/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-wip.dk.mcr-reduction-4b0ab11 [2022-03-01 17:26:13,248 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-01 17:26:13,250 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-01 17:26:13,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-01 17:26:13,364 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2022-03-01 17:26:13,399 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-01 17:26:13,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-01 17:26:13,400 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-03-01 17:26:13,400 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-03-01 17:26:13,401 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-03-01 17:26:13,401 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-03-01 17:26:13,401 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-03-01 17:26:13,402 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-03-01 17:26:13,402 INFO L138 SettingsManager]: * Use SBE=true [2022-03-01 17:26:13,402 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-01 17:26:13,403 INFO L138 SettingsManager]: * sizeof long=4 [2022-03-01 17:26:13,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-01 17:26:13,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-03-01 17:26:13,403 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-01 17:26:13,403 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-01 17:26:13,403 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-01 17:26:13,403 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-01 17:26:13,403 INFO L138 SettingsManager]: * sizeof long double=12 [2022-03-01 17:26:13,403 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-01 17:26:13,404 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-01 17:26:13,404 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-01 17:26:13,404 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-01 17:26:13,404 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-01 17:26:13,404 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-01 17:26:13,405 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-01 17:26:13,405 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:26:13,405 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-01 17:26:13,406 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-03-01 17:26:13,406 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-03-01 17:26:13,406 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-03-01 17:26:13,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-03-01 17:26:13,406 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-03-01 17:26:13,406 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-01 17:26:13,406 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-03-01 17:26:13,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-01 17:26:13,686 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-01 17:26:13,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-01 17:26:13,689 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-03-01 17:26:13,690 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-03-01 17:26:13,691 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl [2022-03-01 17:26:13,691 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl' [2022-03-01 17:26:13,714 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-01 17:26:13,715 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-01 17:26:13,716 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-03-01 17:26:13,716 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-03-01 17:26:13,716 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-03-01 17:26:13,726 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/1) ... [2022-03-01 17:26:13,733 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/1) ... [2022-03-01 17:26:13,737 INFO L137 Inliner]: procedures = 3, calls = 2, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-03-01 17:26:13,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-03-01 17:26:13,740 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-01 17:26:13,740 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-01 17:26:13,740 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-01 17:26:13,746 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/1) ... [2022-03-01 17:26:13,746 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/1) ... [2022-03-01 17:26:13,747 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/1) ... [2022-03-01 17:26:13,747 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/1) ... [2022-03-01 17:26:13,755 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/1) ... [2022-03-01 17:26:13,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/1) ... [2022-03-01 17:26:13,762 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/1) ... [2022-03-01 17:26:13,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-01 17:26:13,765 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-01 17:26:13,765 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-01 17:26:13,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-01 17:26:13,766 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/1) ... [2022-03-01 17:26:13,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-01 17:26:13,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:13,795 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-01 17:26:13,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-01 17:26:13,835 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-03-01 17:26:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-03-01 17:26:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-03-01 17:26:13,835 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-03-01 17:26:13,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-03-01 17:26:13,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-03-01 17:26:13,836 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-03-01 17:26:13,836 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-01 17:26:13,836 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-01 17:26:13,836 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-03-01 17:26:13,880 INFO L234 CfgBuilder]: Building ICFG [2022-03-01 17:26:13,882 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-01 17:26:13,959 INFO L275 CfgBuilder]: Performing block encoding [2022-03-01 17:26:13,988 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-01 17:26:13,988 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-03-01 17:26:13,989 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2022-03-01 17:26:13,989 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2022-03-01 17:26:13,990 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:26:13 BoogieIcfgContainer [2022-03-01 17:26:13,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-01 17:26:13,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-01 17:26:13,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-01 17:26:13,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-01 17:26:13,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 01.03 05:26:13" (1/2) ... [2022-03-01 17:26:13,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45afe916 and model type array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.03 05:26:13, skipping insertion in model container [2022-03-01 17:26:13,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.03 05:26:13" (2/2) ... [2022-03-01 17:26:13,997 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-symm.wvr.bpl [2022-03-01 17:26:14,000 WARN L150 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-03-01 17:26:14,001 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-03-01 17:26:14,001 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-01 17:26:14,001 INFO L534 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-03-01 17:26:14,032 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-03-01 17:26:14,069 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-01 17:26:14,075 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mLazyFiniteAutomaton=false, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR, mMcrOptimizeForkJoin=true, mMcrOverapproximateWrwc=true [2022-03-01 17:26:14,075 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-03-01 17:26:14,083 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 21 places, 16 transitions, 48 flow [2022-03-01 17:26:14,095 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:14,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-01 17:26:14,103 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:14,103 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:14,104 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:14,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:14,108 INFO L85 PathProgramCache]: Analyzing trace with hash -381977313, now seen corresponding path program 1 times [2022-03-01 17:26:14,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:14,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280875582] [2022-03-01 17:26:14,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:14,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:14,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:14,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:14,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:14,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280875582] [2022-03-01 17:26:14,388 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280875582] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:26:14,388 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:26:14,388 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:26:14,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031653508] [2022-03-01 17:26:14,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:26:14,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:26:14,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:14,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:26:14,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:26:14,453 INFO L87 Difference]: Start difference. First operand has 19 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:14,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:14,559 INFO L93 Difference]: Finished difference Result 40 states and 72 transitions. [2022-03-01 17:26:14,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:26:14,563 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-01 17:26:14,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:14,570 INFO L225 Difference]: With dead ends: 40 [2022-03-01 17:26:14,572 INFO L226 Difference]: Without dead ends: 37 [2022-03-01 17:26:14,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:26:14,578 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 11 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:14,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 3 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:14,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-01 17:26:14,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2022-03-01 17:26:14,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:14,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2022-03-01 17:26:14,653 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 10 [2022-03-01 17:26:14,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:14,654 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2022-03-01 17:26:14,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:14,655 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2022-03-01 17:26:14,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-03-01 17:26:14,656 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:14,657 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:14,657 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-01 17:26:14,657 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:14,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash -481455773, now seen corresponding path program 2 times [2022-03-01 17:26:14,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:14,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457691739] [2022-03-01 17:26:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:14,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:14,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:14,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:14,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:14,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457691739] [2022-03-01 17:26:14,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457691739] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:26:14,765 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:26:14,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-03-01 17:26:14,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722645142] [2022-03-01 17:26:14,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:26:14,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-03-01 17:26:14,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:14,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-03-01 17:26:14,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-03-01 17:26:14,768 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:14,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:14,845 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2022-03-01 17:26:14,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-03-01 17:26:14,845 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-03-01 17:26:14,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:14,847 INFO L225 Difference]: With dead ends: 46 [2022-03-01 17:26:14,847 INFO L226 Difference]: Without dead ends: 43 [2022-03-01 17:26:14,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:26:14,852 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 9 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:14,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 6 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:14,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-01 17:26:14,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2022-03-01 17:26:14,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 29 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:14,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 56 transitions. [2022-03-01 17:26:14,858 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 56 transitions. Word has length 10 [2022-03-01 17:26:14,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:14,858 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 56 transitions. [2022-03-01 17:26:14,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:14,858 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 56 transitions. [2022-03-01 17:26:14,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:14,859 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:14,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:14,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-01 17:26:14,859 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:14,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:14,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1042522309, now seen corresponding path program 1 times [2022-03-01 17:26:14,860 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:14,860 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574564704] [2022-03-01 17:26:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:14,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:14,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:14,955 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:14,955 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:14,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574564704] [2022-03-01 17:26:14,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574564704] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:26:14,956 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:26:14,956 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:26:14,956 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404264874] [2022-03-01 17:26:14,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:26:14,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:26:14,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:26:14,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:26:14,958 INFO L87 Difference]: Start difference. First operand 30 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:15,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:15,061 INFO L93 Difference]: Finished difference Result 41 states and 72 transitions. [2022-03-01 17:26:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:15,062 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:15,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:15,062 INFO L225 Difference]: With dead ends: 41 [2022-03-01 17:26:15,063 INFO L226 Difference]: Without dead ends: 36 [2022-03-01 17:26:15,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:26:15,064 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:15,064 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 12 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:15,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-03-01 17:26:15,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 27. [2022-03-01 17:26:15,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.9230769230769231) internal successors, (50), 26 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:15,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 50 transitions. [2022-03-01 17:26:15,069 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 50 transitions. Word has length 11 [2022-03-01 17:26:15,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:15,070 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 50 transitions. [2022-03-01 17:26:15,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:15,070 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 50 transitions. [2022-03-01 17:26:15,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:15,070 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:15,071 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:15,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-01 17:26:15,071 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:15,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:15,072 INFO L85 PathProgramCache]: Analyzing trace with hash -707752653, now seen corresponding path program 1 times [2022-03-01 17:26:15,072 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:15,072 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000413032] [2022-03-01 17:26:15,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:15,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:15,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:15,159 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:15,159 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:15,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000413032] [2022-03-01 17:26:15,160 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000413032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:15,160 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685485498] [2022-03-01 17:26:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:15,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:15,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:15,179 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:15,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-03-01 17:26:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:15,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:26:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:15,359 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:15,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:15,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685485498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:15,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:15,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:26:15,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769324298] [2022-03-01 17:26:15,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:15,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:26:15,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:26:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:26:15,462 INFO L87 Difference]: Start difference. First operand 27 states and 50 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:15,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:15,540 INFO L93 Difference]: Finished difference Result 39 states and 71 transitions. [2022-03-01 17:26:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:15,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:15,546 INFO L225 Difference]: With dead ends: 39 [2022-03-01 17:26:15,546 INFO L226 Difference]: Without dead ends: 39 [2022-03-01 17:26:15,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:26:15,548 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 20 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:15,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 14 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:15,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-01 17:26:15,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2022-03-01 17:26:15,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.962962962962963) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 53 transitions. [2022-03-01 17:26:15,553 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 53 transitions. Word has length 11 [2022-03-01 17:26:15,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:15,554 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 53 transitions. [2022-03-01 17:26:15,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:15,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 53 transitions. [2022-03-01 17:26:15,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:15,555 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:15,555 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:15,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:15,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:15,776 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:15,776 INFO L85 PathProgramCache]: Analyzing trace with hash -742242413, now seen corresponding path program 2 times [2022-03-01 17:26:15,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:15,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993984770] [2022-03-01 17:26:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:15,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:15,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:15,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:15,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993984770] [2022-03-01 17:26:15,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993984770] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:15,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772495459] [2022-03-01 17:26:15,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:26:15,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:15,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:15,856 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:15,858 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-03-01 17:26:15,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:15,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:15,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:26:15,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:15,999 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:16,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:16,093 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772495459] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:16,093 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:16,093 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:26:16,093 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120765561] [2022-03-01 17:26:16,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:16,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:26:16,095 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:16,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:26:16,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:26:16,095 INFO L87 Difference]: Start difference. First operand 28 states and 53 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:16,160 INFO L93 Difference]: Finished difference Result 52 states and 92 transitions. [2022-03-01 17:26:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:16,160 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:16,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:16,162 INFO L225 Difference]: With dead ends: 52 [2022-03-01 17:26:16,163 INFO L226 Difference]: Without dead ends: 52 [2022-03-01 17:26:16,164 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:26:16,169 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 32 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:16,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 14 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:26:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-03-01 17:26:16,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2022-03-01 17:26:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 60 transitions. [2022-03-01 17:26:16,179 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 60 transitions. Word has length 11 [2022-03-01 17:26:16,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:16,180 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 60 transitions. [2022-03-01 17:26:16,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,181 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 60 transitions. [2022-03-01 17:26:16,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:16,181 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:16,181 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:16,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-03-01 17:26:16,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:16,384 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:16,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:16,385 INFO L85 PathProgramCache]: Analyzing trace with hash 59373815, now seen corresponding path program 2 times [2022-03-01 17:26:16,385 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:16,385 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889248604] [2022-03-01 17:26:16,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:16,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:16,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:16,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889248604] [2022-03-01 17:26:16,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889248604] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:26:16,423 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:26:16,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:26:16,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550313451] [2022-03-01 17:26:16,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:26:16,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:26:16,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:26:16,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:26:16,425 INFO L87 Difference]: Start difference. First operand 30 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:16,482 INFO L93 Difference]: Finished difference Result 42 states and 77 transitions. [2022-03-01 17:26:16,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:16,482 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:16,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:16,483 INFO L225 Difference]: With dead ends: 42 [2022-03-01 17:26:16,483 INFO L226 Difference]: Without dead ends: 41 [2022-03-01 17:26:16,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:26:16,486 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:16,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 8 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:26:16,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-01 17:26:16,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 32. [2022-03-01 17:26:16,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.064516129032258) internal successors, (64), 31 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 64 transitions. [2022-03-01 17:26:16,499 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 64 transitions. Word has length 11 [2022-03-01 17:26:16,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:16,499 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 64 transitions. [2022-03-01 17:26:16,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,499 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 64 transitions. [2022-03-01 17:26:16,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:16,500 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:16,500 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:16,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-01 17:26:16,500 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:16,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:16,500 INFO L85 PathProgramCache]: Analyzing trace with hash 865278773, now seen corresponding path program 3 times [2022-03-01 17:26:16,500 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:16,501 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010425241] [2022-03-01 17:26:16,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:16,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:16,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:16,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:16,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010425241] [2022-03-01 17:26:16,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010425241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:26:16,571 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:26:16,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:26:16,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280317834] [2022-03-01 17:26:16,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:26:16,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:26:16,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:26:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:26:16,573 INFO L87 Difference]: Start difference. First operand 32 states and 64 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:16,626 INFO L93 Difference]: Finished difference Result 46 states and 84 transitions. [2022-03-01 17:26:16,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:16,626 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:16,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:16,627 INFO L225 Difference]: With dead ends: 46 [2022-03-01 17:26:16,627 INFO L226 Difference]: Without dead ends: 44 [2022-03-01 17:26:16,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:26:16,629 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:16,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 14 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:26:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-01 17:26:16,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 32. [2022-03-01 17:26:16,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 63 transitions. [2022-03-01 17:26:16,644 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 63 transitions. Word has length 11 [2022-03-01 17:26:16,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:16,645 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 63 transitions. [2022-03-01 17:26:16,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,645 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 63 transitions. [2022-03-01 17:26:16,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:16,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:16,646 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:16,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-01 17:26:16,646 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:16,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:16,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1777717521, now seen corresponding path program 3 times [2022-03-01 17:26:16,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:16,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194609838] [2022-03-01 17:26:16,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:16,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:16,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:16,702 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:16,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194609838] [2022-03-01 17:26:16,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194609838] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:26:16,703 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:26:16,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:26:16,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842034286] [2022-03-01 17:26:16,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:26:16,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:26:16,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:26:16,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:26:16,705 INFO L87 Difference]: Start difference. First operand 32 states and 63 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:16,756 INFO L93 Difference]: Finished difference Result 38 states and 73 transitions. [2022-03-01 17:26:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:16,760 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:16,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:16,761 INFO L225 Difference]: With dead ends: 38 [2022-03-01 17:26:16,761 INFO L226 Difference]: Without dead ends: 38 [2022-03-01 17:26:16,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:26:16,762 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:16,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 6 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:26:16,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-03-01 17:26:16,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 30. [2022-03-01 17:26:16,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 29 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 58 transitions. [2022-03-01 17:26:16,765 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 58 transitions. Word has length 11 [2022-03-01 17:26:16,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:16,765 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 58 transitions. [2022-03-01 17:26:16,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:16,765 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 58 transitions. [2022-03-01 17:26:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:16,765 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:16,766 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:16,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-01 17:26:16,766 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash 617529755, now seen corresponding path program 4 times [2022-03-01 17:26:16,766 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:16,767 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101892006] [2022-03-01 17:26:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:16,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:16,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:16,806 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:16,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101892006] [2022-03-01 17:26:16,807 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101892006] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:16,807 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394286906] [2022-03-01 17:26:16,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:26:16,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:16,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:16,808 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:16,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-03-01 17:26:16,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:26:16,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:16,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:26:16,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:16,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:16,910 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:16,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:16,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394286906] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:16,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:16,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 6 [2022-03-01 17:26:16,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444057783] [2022-03-01 17:26:16,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:16,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-01 17:26:16,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:16,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-01 17:26:16,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-03-01 17:26:16,979 INFO L87 Difference]: Start difference. First operand 30 states and 58 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:17,051 INFO L93 Difference]: Finished difference Result 42 states and 78 transitions. [2022-03-01 17:26:17,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:17,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:17,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:17,055 INFO L225 Difference]: With dead ends: 42 [2022-03-01 17:26:17,055 INFO L226 Difference]: Without dead ends: 42 [2022-03-01 17:26:17,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:26:17,056 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 17 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:17,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 10 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-03-01 17:26:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2022-03-01 17:26:17,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 57 transitions. [2022-03-01 17:26:17,059 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 57 transitions. Word has length 11 [2022-03-01 17:26:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:17,059 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 57 transitions. [2022-03-01 17:26:17,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,059 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 57 transitions. [2022-03-01 17:26:17,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:17,060 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:17,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:17,083 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:17,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:17,283 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:17,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:17,283 INFO L85 PathProgramCache]: Analyzing trace with hash -2019920013, now seen corresponding path program 4 times [2022-03-01 17:26:17,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:17,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713105363] [2022-03-01 17:26:17,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:17,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:17,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:17,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:17,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713105363] [2022-03-01 17:26:17,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713105363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:26:17,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:26:17,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:26:17,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8974594] [2022-03-01 17:26:17,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:26:17,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:26:17,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:17,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:26:17,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:26:17,322 INFO L87 Difference]: Start difference. First operand 29 states and 57 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:17,371 INFO L93 Difference]: Finished difference Result 41 states and 74 transitions. [2022-03-01 17:26:17,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:17,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:17,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:17,371 INFO L225 Difference]: With dead ends: 41 [2022-03-01 17:26:17,372 INFO L226 Difference]: Without dead ends: 39 [2022-03-01 17:26:17,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:26:17,372 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 15 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:17,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:26:17,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-01 17:26:17,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 29. [2022-03-01 17:26:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2022-03-01 17:26:17,375 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2022-03-01 17:26:17,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:17,375 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2022-03-01 17:26:17,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,375 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2022-03-01 17:26:17,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:17,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:17,376 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:17,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-01 17:26:17,376 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:17,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:17,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1491865081, now seen corresponding path program 5 times [2022-03-01 17:26:17,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:17,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073884205] [2022-03-01 17:26:17,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:17,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:17,409 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:17,409 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:17,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073884205] [2022-03-01 17:26:17,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073884205] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:17,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313643451] [2022-03-01 17:26:17,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:26:17,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:17,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:17,411 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:17,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-03-01 17:26:17,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:17,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2022-03-01 17:26:17,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:17,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:17,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313643451] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:17,571 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:17,571 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 7 [2022-03-01 17:26:17,571 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059159590] [2022-03-01 17:26:17,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:17,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-03-01 17:26:17,572 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:17,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-03-01 17:26:17,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:26:17,573 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:17,629 INFO L93 Difference]: Finished difference Result 44 states and 80 transitions. [2022-03-01 17:26:17,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:17,630 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:17,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:17,630 INFO L225 Difference]: With dead ends: 44 [2022-03-01 17:26:17,630 INFO L226 Difference]: Without dead ends: 44 [2022-03-01 17:26:17,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2022-03-01 17:26:17,631 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:17,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 10 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:26:17,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-03-01 17:26:17,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 29. [2022-03-01 17:26:17,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 2.0) internal successors, (56), 28 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 56 transitions. [2022-03-01 17:26:17,634 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 56 transitions. Word has length 11 [2022-03-01 17:26:17,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:17,634 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 56 transitions. [2022-03-01 17:26:17,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,634 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 56 transitions. [2022-03-01 17:26:17,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:17,634 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:17,635 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:17,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:17,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:17,835 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:17,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:17,836 INFO L85 PathProgramCache]: Analyzing trace with hash -2001485987, now seen corresponding path program 5 times [2022-03-01 17:26:17,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:17,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938643273] [2022-03-01 17:26:17,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:17,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:17,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:17,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938643273] [2022-03-01 17:26:17,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [938643273] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:26:17,888 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:26:17,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:26:17,890 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193005570] [2022-03-01 17:26:17,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:26:17,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:26:17,891 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:17,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:26:17,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:26:17,891 INFO L87 Difference]: Start difference. First operand 29 states and 56 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:17,945 INFO L93 Difference]: Finished difference Result 41 states and 73 transitions. [2022-03-01 17:26:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:17,945 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:17,946 INFO L225 Difference]: With dead ends: 41 [2022-03-01 17:26:17,946 INFO L226 Difference]: Without dead ends: 40 [2022-03-01 17:26:17,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:26:17,946 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:17,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 10 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:26:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-03-01 17:26:17,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 31. [2022-03-01 17:26:17,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 60 transitions. [2022-03-01 17:26:17,951 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 60 transitions. Word has length 11 [2022-03-01 17:26:17,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:17,951 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 60 transitions. [2022-03-01 17:26:17,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:17,951 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 60 transitions. [2022-03-01 17:26:17,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:17,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:17,952 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:17,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-01 17:26:17,952 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:17,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:17,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1195581029, now seen corresponding path program 6 times [2022-03-01 17:26:17,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:17,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870076880] [2022-03-01 17:26:17,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:17,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:17,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:18,004 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:18,004 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870076880] [2022-03-01 17:26:18,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870076880] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:26:18,005 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:26:18,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:26:18,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412694046] [2022-03-01 17:26:18,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:26:18,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:26:18,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:18,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:26:18,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:26:18,006 INFO L87 Difference]: Start difference. First operand 31 states and 60 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:18,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:18,053 INFO L93 Difference]: Finished difference Result 35 states and 65 transitions. [2022-03-01 17:26:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:18,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:18,054 INFO L225 Difference]: With dead ends: 35 [2022-03-01 17:26:18,054 INFO L226 Difference]: Without dead ends: 33 [2022-03-01 17:26:18,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:26:18,056 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:18,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 6 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:26:18,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-01 17:26:18,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2022-03-01 17:26:18,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 30 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:18,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 59 transitions. [2022-03-01 17:26:18,059 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 59 transitions. Word has length 11 [2022-03-01 17:26:18,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:18,059 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 59 transitions. [2022-03-01 17:26:18,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:18,059 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 59 transitions. [2022-03-01 17:26:18,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-03-01 17:26:18,059 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:18,060 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:18,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-01 17:26:18,060 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:18,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:18,060 INFO L85 PathProgramCache]: Analyzing trace with hash -283142281, now seen corresponding path program 6 times [2022-03-01 17:26:18,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:18,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321280256] [2022-03-01 17:26:18,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:18,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:18,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:18,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321280256] [2022-03-01 17:26:18,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321280256] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-01 17:26:18,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-01 17:26:18,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-03-01 17:26:18,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075507029] [2022-03-01 17:26:18,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-01 17:26:18,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-03-01 17:26:18,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:18,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-03-01 17:26:18,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-03-01 17:26:18,105 INFO L87 Difference]: Start difference. First operand 31 states and 59 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:18,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:18,155 INFO L93 Difference]: Finished difference Result 32 states and 60 transitions. [2022-03-01 17:26:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-03-01 17:26:18,155 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-03-01 17:26:18,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:18,156 INFO L225 Difference]: With dead ends: 32 [2022-03-01 17:26:18,156 INFO L226 Difference]: Without dead ends: 32 [2022-03-01 17:26:18,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-03-01 17:26:18,157 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:18,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 8 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-01 17:26:18,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-03-01 17:26:18,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2022-03-01 17:26:18,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:18,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 52 transitions. [2022-03-01 17:26:18,159 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 52 transitions. Word has length 11 [2022-03-01 17:26:18,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:18,159 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 52 transitions. [2022-03-01 17:26:18,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:18,160 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 52 transitions. [2022-03-01 17:26:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-01 17:26:18,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:18,160 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:18,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-01 17:26:18,160 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:18,161 INFO L85 PathProgramCache]: Analyzing trace with hash -466578639, now seen corresponding path program 1 times [2022-03-01 17:26:18,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:18,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904331530] [2022-03-01 17:26:18,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:18,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:18,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:18,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:18,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:18,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904331530] [2022-03-01 17:26:18,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904331530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:18,398 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588942027] [2022-03-01 17:26:18,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:18,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:18,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:18,399 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:18,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-03-01 17:26:18,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:18,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:26:18,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:18,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2022-03-01 17:26:18,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 56 [2022-03-01 17:26:18,738 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:18,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:19,119 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:19,120 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 111 [2022-03-01 17:26:19,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:19,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 91 [2022-03-01 17:26:19,310 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:19,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588942027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:19,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:19,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 12 [2022-03-01 17:26:19,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188704784] [2022-03-01 17:26:19,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:19,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:19,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:19,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:19,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:19,312 INFO L87 Difference]: Start difference. First operand 28 states and 52 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:19,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:19,552 INFO L93 Difference]: Finished difference Result 56 states and 104 transitions. [2022-03-01 17:26:19,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:26:19,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-01 17:26:19,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:19,553 INFO L225 Difference]: With dead ends: 56 [2022-03-01 17:26:19,553 INFO L226 Difference]: Without dead ends: 53 [2022-03-01 17:26:19,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:26:19,554 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 25 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:19,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 8 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:19,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-01 17:26:19,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 37. [2022-03-01 17:26:19,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.0) internal successors, (72), 36 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:19,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 72 transitions. [2022-03-01 17:26:19,556 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 72 transitions. Word has length 12 [2022-03-01 17:26:19,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:19,556 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 72 transitions. [2022-03-01 17:26:19,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:19,557 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 72 transitions. [2022-03-01 17:26:19,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-01 17:26:19,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:19,557 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:19,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:19,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-03-01 17:26:19,758 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:19,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:19,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1514371261, now seen corresponding path program 2 times [2022-03-01 17:26:19,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:19,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990218797] [2022-03-01 17:26:19,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:19,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:19,920 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:19,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990218797] [2022-03-01 17:26:19,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990218797] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:19,920 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458620251] [2022-03-01 17:26:19,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:26:19,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:19,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:19,922 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:19,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-03-01 17:26:19,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:19,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:19,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:26:19,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:20,085 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:20,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-03-01 17:26:20,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:20,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:26:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:20,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:20,380 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:20,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 120 [2022-03-01 17:26:20,390 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:20,391 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 92 [2022-03-01 17:26:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:20,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458620251] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:20,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:20,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-03-01 17:26:20,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567208025] [2022-03-01 17:26:20,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:20,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:20,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:20,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:20,599 INFO L87 Difference]: Start difference. First operand 37 states and 72 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:20,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:20,779 INFO L93 Difference]: Finished difference Result 57 states and 107 transitions. [2022-03-01 17:26:20,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:26:20,779 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-01 17:26:20,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:20,780 INFO L225 Difference]: With dead ends: 57 [2022-03-01 17:26:20,780 INFO L226 Difference]: Without dead ends: 54 [2022-03-01 17:26:20,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:26:20,781 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:20,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 14 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-01 17:26:20,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2022-03-01 17:26:20,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:20,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 88 transitions. [2022-03-01 17:26:20,784 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 88 transitions. Word has length 12 [2022-03-01 17:26:20,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:20,784 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 88 transitions. [2022-03-01 17:26:20,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 88 transitions. [2022-03-01 17:26:20,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-01 17:26:20,785 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:20,785 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:20,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:20,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-03-01 17:26:20,994 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1506640863, now seen corresponding path program 3 times [2022-03-01 17:26:20,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:20,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584604048] [2022-03-01 17:26:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:20,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:21,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:21,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:21,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:21,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584604048] [2022-03-01 17:26:21,152 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584604048] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:21,152 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052065630] [2022-03-01 17:26:21,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:26:21,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:21,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:21,153 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:21,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-03-01 17:26:21,183 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:26:21,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:21,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:26:21,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:21,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:21,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-03-01 17:26:21,315 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:21,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:26:21,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:21,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:21,613 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:21,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 121 [2022-03-01 17:26:21,622 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:21,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-03-01 17:26:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:21,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052065630] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:21,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:21,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-01 17:26:21,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143225229] [2022-03-01 17:26:21,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:21,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:21,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:21,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:21,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:21,851 INFO L87 Difference]: Start difference. First operand 43 states and 88 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:21,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:21,950 INFO L93 Difference]: Finished difference Result 54 states and 108 transitions. [2022-03-01 17:26:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-03-01 17:26:21,951 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-01 17:26:21,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:21,951 INFO L225 Difference]: With dead ends: 54 [2022-03-01 17:26:21,951 INFO L226 Difference]: Without dead ends: 51 [2022-03-01 17:26:21,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:21,952 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:21,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 103 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-03-01 17:26:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-01 17:26:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2022-03-01 17:26:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.0952380952380953) internal successors, (88), 42 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:21,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 88 transitions. [2022-03-01 17:26:21,955 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 88 transitions. Word has length 12 [2022-03-01 17:26:21,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:21,955 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 88 transitions. [2022-03-01 17:26:21,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:21,955 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 88 transitions. [2022-03-01 17:26:21,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-01 17:26:21,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:21,956 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:21,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:22,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:22,168 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:22,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1983860283, now seen corresponding path program 4 times [2022-03-01 17:26:22,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:22,168 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649147723] [2022-03-01 17:26:22,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:22,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:22,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:22,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:22,384 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:22,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649147723] [2022-03-01 17:26:22,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649147723] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:22,384 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293707493] [2022-03-01 17:26:22,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:26:22,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:22,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:22,386 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:22,410 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-03-01 17:26:22,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:26:22,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:22,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:26:22,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:22,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:22,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-03-01 17:26:22,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:22,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:26:22,679 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:22,679 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:22,982 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:22,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 127 treesize of output 117 [2022-03-01 17:26:22,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:22,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 97 [2022-03-01 17:26:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:23,113 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293707493] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:23,113 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:23,113 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-03-01 17:26:23,113 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099221518] [2022-03-01 17:26:23,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:23,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:23,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:23,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:23,114 INFO L87 Difference]: Start difference. First operand 43 states and 88 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:23,289 INFO L93 Difference]: Finished difference Result 70 states and 138 transitions. [2022-03-01 17:26:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:26:23,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-01 17:26:23,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:23,290 INFO L225 Difference]: With dead ends: 70 [2022-03-01 17:26:23,290 INFO L226 Difference]: Without dead ends: 67 [2022-03-01 17:26:23,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:26:23,291 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 19 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:23,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 8 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 157 Invalid, 0 Unknown, 20 Unchecked, 0.1s Time] [2022-03-01 17:26:23,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-01 17:26:23,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 46. [2022-03-01 17:26:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2022-03-01 17:26:23,294 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 12 [2022-03-01 17:26:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:23,294 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2022-03-01 17:26:23,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:23,294 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2022-03-01 17:26:23,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-01 17:26:23,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:23,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:23,318 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:23,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-03-01 17:26:23,495 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:23,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:23,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2002294309, now seen corresponding path program 5 times [2022-03-01 17:26:23,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:23,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073083804] [2022-03-01 17:26:23,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:23,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:23,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:23,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:23,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073083804] [2022-03-01 17:26:23,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073083804] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:23,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849515429] [2022-03-01 17:26:23,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:26:23,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:23,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:23,816 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:23,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-03-01 17:26:23,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:23,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:23,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:26:23,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:24,024 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:26:24,025 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 76 treesize of output 67 [2022-03-01 17:26:24,039 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:26:24,039 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-03-01 17:26:24,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:24,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:24,392 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:24,393 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 112 [2022-03-01 17:26:24,400 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:24,404 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 92 [2022-03-01 17:26:24,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:24,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849515429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:24,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:24,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 14 [2022-03-01 17:26:24,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391608879] [2022-03-01 17:26:24,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:24,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:26:24,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:24,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:26:24,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:24,543 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:24,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:24,819 INFO L93 Difference]: Finished difference Result 72 states and 138 transitions. [2022-03-01 17:26:24,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:26:24,819 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-01 17:26:24,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:24,820 INFO L225 Difference]: With dead ends: 72 [2022-03-01 17:26:24,820 INFO L226 Difference]: Without dead ends: 69 [2022-03-01 17:26:24,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:26:24,821 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 23 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:24,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 10 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 150 Invalid, 0 Unknown, 30 Unchecked, 0.1s Time] [2022-03-01 17:26:24,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-01 17:26:24,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2022-03-01 17:26:24,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:24,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2022-03-01 17:26:24,823 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 12 [2022-03-01 17:26:24,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:24,824 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2022-03-01 17:26:24,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:24,824 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2022-03-01 17:26:24,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-01 17:26:24,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:24,824 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:24,847 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:25,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:25,025 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:25,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:25,025 INFO L85 PathProgramCache]: Analyzing trace with hash -976515683, now seen corresponding path program 6 times [2022-03-01 17:26:25,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:25,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983612000] [2022-03-01 17:26:25,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:25,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:25,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:25,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:25,161 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:25,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983612000] [2022-03-01 17:26:25,161 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983612000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:25,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235268545] [2022-03-01 17:26:25,161 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:26:25,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:25,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:25,164 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:25,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-03-01 17:26:25,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:26:25,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:25,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:26:25,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:25,341 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:25,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-03-01 17:26:25,344 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:25,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:26:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:25,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:25,612 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:25,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 136 treesize of output 120 [2022-03-01 17:26:25,621 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:25,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 92 [2022-03-01 17:26:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:25,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235268545] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:25,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:25,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 13 [2022-03-01 17:26:25,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970633299] [2022-03-01 17:26:25,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:25,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:25,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:25,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:25,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:25,801 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:25,914 INFO L93 Difference]: Finished difference Result 57 states and 115 transitions. [2022-03-01 17:26:25,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:26:25,915 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-01 17:26:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:25,915 INFO L225 Difference]: With dead ends: 57 [2022-03-01 17:26:25,916 INFO L226 Difference]: Without dead ends: 54 [2022-03-01 17:26:25,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:26:25,916 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 10 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 23 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:25,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 9 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 128 Invalid, 0 Unknown, 23 Unchecked, 0.1s Time] [2022-03-01 17:26:25,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-03-01 17:26:25,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2022-03-01 17:26:25,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.111111111111111) internal successors, (95), 45 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:25,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 95 transitions. [2022-03-01 17:26:25,919 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 95 transitions. Word has length 12 [2022-03-01 17:26:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:25,919 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 95 transitions. [2022-03-01 17:26:25,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:25,919 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 95 transitions. [2022-03-01 17:26:25,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-01 17:26:25,919 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:25,920 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:25,947 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:26,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:26,131 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:26,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:26,132 INFO L85 PathProgramCache]: Analyzing trace with hash -968785285, now seen corresponding path program 7 times [2022-03-01 17:26:26,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:26,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338525082] [2022-03-01 17:26:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:26,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:26,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:26,253 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:26,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338525082] [2022-03-01 17:26:26,253 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338525082] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:26,253 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690924265] [2022-03-01 17:26:26,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:26:26,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:26,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:26,254 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:26,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-03-01 17:26:26,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:26,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2022-03-01 17:26:26,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:26,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:26,370 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 60 [2022-03-01 17:26:26,372 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:26,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:26:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:26,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:26,592 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:26,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 137 treesize of output 121 [2022-03-01 17:26:26,598 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:26,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 93 [2022-03-01 17:26:26,782 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:26,782 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690924265] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:26,782 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:26,782 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-03-01 17:26:26,782 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103175934] [2022-03-01 17:26:26,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:26,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:26,783 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:26,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:26,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:26,783 INFO L87 Difference]: Start difference. First operand 46 states and 95 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:26,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:26,892 INFO L93 Difference]: Finished difference Result 67 states and 132 transitions. [2022-03-01 17:26:26,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:26:26,892 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2022-03-01 17:26:26,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:26,893 INFO L225 Difference]: With dead ends: 67 [2022-03-01 17:26:26,893 INFO L226 Difference]: Without dead ends: 64 [2022-03-01 17:26:26,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:26,893 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 30 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:26,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 9 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:26,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-03-01 17:26:26,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 51. [2022-03-01 17:26:26,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.22) internal successors, (111), 50 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 111 transitions. [2022-03-01 17:26:26,896 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 111 transitions. Word has length 12 [2022-03-01 17:26:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:26,896 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 111 transitions. [2022-03-01 17:26:26,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:26,897 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 111 transitions. [2022-03-01 17:26:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:26,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:26,897 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:26,916 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-03-01 17:26:27,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-03-01 17:26:27,107 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:27,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:27,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1580118797, now seen corresponding path program 8 times [2022-03-01 17:26:27,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:27,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39581253] [2022-03-01 17:26:27,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:27,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:27,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:27,180 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:27,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39581253] [2022-03-01 17:26:27,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39581253] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:27,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645072247] [2022-03-01 17:26:27,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:26:27,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:27,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:27,182 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:27,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-03-01 17:26:27,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:27,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:27,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:27,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:27,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:26:27,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:26:27,371 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:27,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:27,447 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:27,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:26:27,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:27,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645072247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:27,460 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:27,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:26:27,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251930285] [2022-03-01 17:26:27,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:27,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:26:27,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:26:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:26:27,461 INFO L87 Difference]: Start difference. First operand 51 states and 111 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:27,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:27,667 INFO L93 Difference]: Finished difference Result 72 states and 149 transitions. [2022-03-01 17:26:27,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:27,668 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:27,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:27,668 INFO L225 Difference]: With dead ends: 72 [2022-03-01 17:26:27,668 INFO L226 Difference]: Without dead ends: 65 [2022-03-01 17:26:27,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:26:27,669 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:27,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 20 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:27,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-01 17:26:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 48. [2022-03-01 17:26:27,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.234042553191489) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 105 transitions. [2022-03-01 17:26:27,672 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 105 transitions. Word has length 13 [2022-03-01 17:26:27,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:27,672 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 105 transitions. [2022-03-01 17:26:27,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:27,672 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 105 transitions. [2022-03-01 17:26:27,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:27,673 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:27,673 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:27,698 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:27,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-03-01 17:26:27,884 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:27,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash -4067771, now seen corresponding path program 9 times [2022-03-01 17:26:27,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:27,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496604612] [2022-03-01 17:26:27,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:27,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:27,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:27,956 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:27,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496604612] [2022-03-01 17:26:27,956 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496604612] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:27,956 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424357792] [2022-03-01 17:26:27,956 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:26:27,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:27,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:27,958 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:27,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-03-01 17:26:27,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:26:27,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:27,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:27,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:28,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:26:28,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:26:28,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:26:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:28,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:28,202 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:28,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:26:28,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:26:28,211 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:28,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424357792] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:28,211 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:28,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:26:28,211 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150764349] [2022-03-01 17:26:28,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:28,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:26:28,211 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:28,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:26:28,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:26:28,212 INFO L87 Difference]: Start difference. First operand 48 states and 105 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:28,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:28,388 INFO L93 Difference]: Finished difference Result 71 states and 151 transitions. [2022-03-01 17:26:28,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:26:28,388 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:28,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:28,389 INFO L225 Difference]: With dead ends: 71 [2022-03-01 17:26:28,389 INFO L226 Difference]: Without dead ends: 71 [2022-03-01 17:26:28,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:28,389 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 37 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:28,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 26 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:28,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-01 17:26:28,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 49. [2022-03-01 17:26:28,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.25) internal successors, (108), 48 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:28,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 108 transitions. [2022-03-01 17:26:28,392 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 108 transitions. Word has length 13 [2022-03-01 17:26:28,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:28,392 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 108 transitions. [2022-03-01 17:26:28,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:28,392 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 108 transitions. [2022-03-01 17:26:28,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:28,393 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:28,393 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:28,417 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:28,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-03-01 17:26:28,593 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:28,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1853476621, now seen corresponding path program 10 times [2022-03-01 17:26:28,594 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:28,594 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021675061] [2022-03-01 17:26:28,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:28,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:28,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:28,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:28,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021675061] [2022-03-01 17:26:28,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021675061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:28,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634556157] [2022-03-01 17:26:28,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:26:28,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:28,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:28,697 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:28,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-03-01 17:26:28,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:26:28,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:28,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:28,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:28,805 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:28,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:28,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:28,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:28,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:28,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:28,981 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:28,981 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:26:28,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:28,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:28,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634556157] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:28,996 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:28,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:26:28,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339957517] [2022-03-01 17:26:28,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:28,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:28,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:28,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:28,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:28,998 INFO L87 Difference]: Start difference. First operand 49 states and 108 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:29,262 INFO L93 Difference]: Finished difference Result 114 states and 220 transitions. [2022-03-01 17:26:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:26:29,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:29,263 INFO L225 Difference]: With dead ends: 114 [2022-03-01 17:26:29,263 INFO L226 Difference]: Without dead ends: 114 [2022-03-01 17:26:29,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:26:29,264 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 114 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:29,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 34 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:29,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-03-01 17:26:29,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 53. [2022-03-01 17:26:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.3653846153846154) internal successors, (123), 52 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:29,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 123 transitions. [2022-03-01 17:26:29,267 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 123 transitions. Word has length 13 [2022-03-01 17:26:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:29,267 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 123 transitions. [2022-03-01 17:26:29,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 123 transitions. [2022-03-01 17:26:29,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:29,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:29,267 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:29,292 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:29,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:29,468 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:29,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:29,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1051860393, now seen corresponding path program 11 times [2022-03-01 17:26:29,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:29,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776059091] [2022-03-01 17:26:29,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:29,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:29,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:29,554 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:29,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776059091] [2022-03-01 17:26:29,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776059091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:29,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114102856] [2022-03-01 17:26:29,554 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:26:29,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:29,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:29,556 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:29,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-03-01 17:26:29,583 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:26:29,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:29,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:29,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:29,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:29,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:29,673 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:29,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:29,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:29,840 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:29,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:26:29,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:26:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:29,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114102856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:29,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:29,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:26:29,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840619320] [2022-03-01 17:26:29,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:29,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:29,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:29,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:29,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:29,850 INFO L87 Difference]: Start difference. First operand 53 states and 123 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:30,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:30,322 INFO L93 Difference]: Finished difference Result 113 states and 223 transitions. [2022-03-01 17:26:30,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:26:30,323 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:30,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:30,323 INFO L225 Difference]: With dead ends: 113 [2022-03-01 17:26:30,323 INFO L226 Difference]: Without dead ends: 108 [2022-03-01 17:26:30,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:26:30,324 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 100 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:30,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 30 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:30,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-01 17:26:30,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 57. [2022-03-01 17:26:30,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.357142857142857) internal successors, (132), 56 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:30,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 132 transitions. [2022-03-01 17:26:30,327 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 132 transitions. Word has length 13 [2022-03-01 17:26:30,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:30,327 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 132 transitions. [2022-03-01 17:26:30,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:30,328 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 132 transitions. [2022-03-01 17:26:30,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:30,328 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:30,328 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:30,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-03-01 17:26:30,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:30,539 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:30,540 INFO L85 PathProgramCache]: Analyzing trace with hash 666483313, now seen corresponding path program 12 times [2022-03-01 17:26:30,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:30,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203270188] [2022-03-01 17:26:30,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:30,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:30,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:30,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203270188] [2022-03-01 17:26:30,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203270188] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:30,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054589117] [2022-03-01 17:26:30,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:26:30,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:30,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:30,612 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:30,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-03-01 17:26:30,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:26:30,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:30,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:30,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:30,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:30,714 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:30,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:30,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:30,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:30,890 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:30,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:26:30,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:26:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:30,908 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054589117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:30,908 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:30,908 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:26:30,908 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100310148] [2022-03-01 17:26:30,908 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:30,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:30,908 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:30,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:30,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:30,909 INFO L87 Difference]: Start difference. First operand 57 states and 132 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:31,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:31,327 INFO L93 Difference]: Finished difference Result 105 states and 218 transitions. [2022-03-01 17:26:31,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:26:31,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:31,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:31,328 INFO L225 Difference]: With dead ends: 105 [2022-03-01 17:26:31,328 INFO L226 Difference]: Without dead ends: 105 [2022-03-01 17:26:31,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:26:31,329 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 72 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:31,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 26 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:31,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-01 17:26:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 56. [2022-03-01 17:26:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.309090909090909) internal successors, (127), 55 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:31,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 127 transitions. [2022-03-01 17:26:31,332 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 127 transitions. Word has length 13 [2022-03-01 17:26:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:31,332 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 127 transitions. [2022-03-01 17:26:31,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 127 transitions. [2022-03-01 17:26:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:31,332 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:31,332 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:31,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:31,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-03-01 17:26:31,539 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash -1044129995, now seen corresponding path program 13 times [2022-03-01 17:26:31,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:31,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131819021] [2022-03-01 17:26:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:31,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:31,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:31,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:31,609 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:31,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131819021] [2022-03-01 17:26:31,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131819021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:31,610 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636823443] [2022-03-01 17:26:31,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:26:31,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:31,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:31,611 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:31,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-03-01 17:26:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:31,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:31,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:31,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:31,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:26:31,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:31,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:26:31,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:31,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:31,909 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:31,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:26:31,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:26:31,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:31,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636823443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:31,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:31,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:26:31,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139318984] [2022-03-01 17:26:31,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:31,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:31,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:31,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:31,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:31,922 INFO L87 Difference]: Start difference. First operand 56 states and 127 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:32,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:32,129 INFO L93 Difference]: Finished difference Result 98 states and 212 transitions. [2022-03-01 17:26:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:32,129 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:32,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:32,131 INFO L225 Difference]: With dead ends: 98 [2022-03-01 17:26:32,131 INFO L226 Difference]: Without dead ends: 98 [2022-03-01 17:26:32,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:26:32,132 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:32,132 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 18 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 240 Invalid, 0 Unknown, 34 Unchecked, 0.1s Time] [2022-03-01 17:26:32,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-03-01 17:26:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 56. [2022-03-01 17:26:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.309090909090909) internal successors, (127), 55 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:32,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 127 transitions. [2022-03-01 17:26:32,134 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 127 transitions. Word has length 13 [2022-03-01 17:26:32,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:32,135 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 127 transitions. [2022-03-01 17:26:32,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 127 transitions. [2022-03-01 17:26:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:32,135 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:32,135 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:32,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:32,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-03-01 17:26:32,343 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:32,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:32,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1239138935, now seen corresponding path program 14 times [2022-03-01 17:26:32,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:32,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708584720] [2022-03-01 17:26:32,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:32,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:32,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:32,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:32,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708584720] [2022-03-01 17:26:32,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708584720] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:32,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340135880] [2022-03-01 17:26:32,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:26:32,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:32,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:32,407 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:32,408 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-03-01 17:26:32,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:32,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:32,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:32,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:32,520 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:32,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:26:32,524 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:32,524 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:26:32,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:32,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:26:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:32,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:32,632 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:32,633 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:32,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:32,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:32,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340135880] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:32,650 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:32,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:32,651 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618964644] [2022-03-01 17:26:32,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:32,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:32,652 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:32,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:32,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:32,652 INFO L87 Difference]: Start difference. First operand 56 states and 127 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:32,809 INFO L93 Difference]: Finished difference Result 87 states and 182 transitions. [2022-03-01 17:26:32,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:32,810 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:32,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:32,810 INFO L225 Difference]: With dead ends: 87 [2022-03-01 17:26:32,811 INFO L226 Difference]: Without dead ends: 87 [2022-03-01 17:26:32,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:32,811 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 39 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:32,811 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 42 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:32,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-01 17:26:32,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 60. [2022-03-01 17:26:32,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.406779661016949) internal successors, (142), 59 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 142 transitions. [2022-03-01 17:26:32,814 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 142 transitions. Word has length 13 [2022-03-01 17:26:32,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:32,814 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 142 transitions. [2022-03-01 17:26:32,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:32,814 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 142 transitions. [2022-03-01 17:26:32,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:32,814 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:32,814 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:32,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:33,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-03-01 17:26:33,015 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:33,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:33,016 INFO L85 PathProgramCache]: Analyzing trace with hash 319438227, now seen corresponding path program 15 times [2022-03-01 17:26:33,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:33,016 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151023678] [2022-03-01 17:26:33,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:33,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:33,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:33,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:33,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151023678] [2022-03-01 17:26:33,078 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151023678] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:33,078 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958929378] [2022-03-01 17:26:33,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:26:33,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:33,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:33,079 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:33,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-03-01 17:26:33,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:26:33,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:33,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:33,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:33,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:33,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:26:33,208 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:33,209 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:26:33,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:33,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:33,345 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:33,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:26:33,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:33,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958929378] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:33,365 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:33,366 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:33,366 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624279511] [2022-03-01 17:26:33,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:33,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:33,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:33,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:33,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:33,367 INFO L87 Difference]: Start difference. First operand 60 states and 142 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:33,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:33,579 INFO L93 Difference]: Finished difference Result 78 states and 165 transitions. [2022-03-01 17:26:33,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:26:33,579 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:33,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:33,579 INFO L225 Difference]: With dead ends: 78 [2022-03-01 17:26:33,580 INFO L226 Difference]: Without dead ends: 75 [2022-03-01 17:26:33,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:26:33,580 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 31 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:33,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 18 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:33,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-01 17:26:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2022-03-01 17:26:33,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.389830508474576) internal successors, (141), 59 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:33,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 141 transitions. [2022-03-01 17:26:33,583 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 141 transitions. Word has length 13 [2022-03-01 17:26:33,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:33,583 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 141 transitions. [2022-03-01 17:26:33,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:33,583 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 141 transitions. [2022-03-01 17:26:33,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:33,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:33,584 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:33,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:33,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-03-01 17:26:33,787 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:33,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:33,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1246869333, now seen corresponding path program 16 times [2022-03-01 17:26:33,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:33,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560548065] [2022-03-01 17:26:33,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:33,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:33,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:33,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:33,858 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:33,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560548065] [2022-03-01 17:26:33,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560548065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:33,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326176382] [2022-03-01 17:26:33,859 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:26:33,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:33,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:33,861 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:33,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-03-01 17:26:33,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:26:33,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:33,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:33,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:33,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:33,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:33,977 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:33,977 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:34,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:34,151 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:34,151 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:34,154 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:34,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326176382] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:34,170 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:34,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:34,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664437259] [2022-03-01 17:26:34,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:34,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:34,170 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:34,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:34,171 INFO L87 Difference]: Start difference. First operand 60 states and 141 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:34,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:34,385 INFO L93 Difference]: Finished difference Result 100 states and 199 transitions. [2022-03-01 17:26:34,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:34,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:34,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:34,386 INFO L225 Difference]: With dead ends: 100 [2022-03-01 17:26:34,386 INFO L226 Difference]: Without dead ends: 99 [2022-03-01 17:26:34,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:26:34,387 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:34,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 36 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:34,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-01 17:26:34,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 61. [2022-03-01 17:26:34,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.3666666666666667) internal successors, (142), 60 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:34,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 142 transitions. [2022-03-01 17:26:34,390 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 142 transitions. Word has length 13 [2022-03-01 17:26:34,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:34,390 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 142 transitions. [2022-03-01 17:26:34,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:34,390 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 142 transitions. [2022-03-01 17:26:34,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:34,390 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:34,390 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:34,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:34,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:34,591 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:34,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash 2048485561, now seen corresponding path program 17 times [2022-03-01 17:26:34,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:34,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500702069] [2022-03-01 17:26:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:34,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:34,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500702069] [2022-03-01 17:26:34,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500702069] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:34,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297168220] [2022-03-01 17:26:34,663 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:26:34,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:34,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:34,664 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:34,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-03-01 17:26:34,687 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:34,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:34,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:34,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:34,754 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:34,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:34,761 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:34,762 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:34,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:34,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:34,886 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:34,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:26:34,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:34,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297168220] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:34,904 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:34,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:34,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578303683] [2022-03-01 17:26:34,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:34,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:34,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:34,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:34,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:34,905 INFO L87 Difference]: Start difference. First operand 61 states and 142 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:35,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:35,076 INFO L93 Difference]: Finished difference Result 85 states and 177 transitions. [2022-03-01 17:26:35,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:26:35,076 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:35,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:35,076 INFO L225 Difference]: With dead ends: 85 [2022-03-01 17:26:35,076 INFO L226 Difference]: Without dead ends: 81 [2022-03-01 17:26:35,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:26:35,077 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 43 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:35,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 12 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-01 17:26:35,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2022-03-01 17:26:35,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.3442622950819674) internal successors, (143), 61 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 143 transitions. [2022-03-01 17:26:35,079 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 143 transitions. Word has length 13 [2022-03-01 17:26:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:35,080 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 143 transitions. [2022-03-01 17:26:35,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:35,080 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 143 transitions. [2022-03-01 17:26:35,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:35,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:35,080 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:35,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:35,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:35,295 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:35,296 INFO L85 PathProgramCache]: Analyzing trace with hash -528138029, now seen corresponding path program 18 times [2022-03-01 17:26:35,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:35,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213415291] [2022-03-01 17:26:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:35,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:35,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:35,377 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:35,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213415291] [2022-03-01 17:26:35,377 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213415291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:35,377 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416665] [2022-03-01 17:26:35,377 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:26:35,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:35,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:35,378 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:35,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-03-01 17:26:35,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:26:35,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:35,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:35,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:35,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:35,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:35,472 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:35,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:35,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:35,526 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:35,601 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:35,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:26:35,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:35,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:35,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416665] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:35,617 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:35,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:35,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383235872] [2022-03-01 17:26:35,617 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:35,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:35,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:35,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:35,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:35,618 INFO L87 Difference]: Start difference. First operand 62 states and 143 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:35,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:35,751 INFO L93 Difference]: Finished difference Result 78 states and 171 transitions. [2022-03-01 17:26:35,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:26:35,752 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:35,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:35,752 INFO L225 Difference]: With dead ends: 78 [2022-03-01 17:26:35,752 INFO L226 Difference]: Without dead ends: 78 [2022-03-01 17:26:35,753 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:26:35,753 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:35,753 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 14 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-03-01 17:26:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 61. [2022-03-01 17:26:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.316666666666667) internal successors, (139), 60 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:35,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 139 transitions. [2022-03-01 17:26:35,756 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 139 transitions. Word has length 13 [2022-03-01 17:26:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:35,756 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 139 transitions. [2022-03-01 17:26:35,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 139 transitions. [2022-03-01 17:26:35,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:35,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:35,756 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:35,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:35,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:35,971 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:35,972 INFO L85 PathProgramCache]: Analyzing trace with hash -242535663, now seen corresponding path program 19 times [2022-03-01 17:26:35,972 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:35,972 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83957614] [2022-03-01 17:26:35,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:35,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:35,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:36,049 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:36,049 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:36,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83957614] [2022-03-01 17:26:36,050 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83957614] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:36,050 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243475599] [2022-03-01 17:26:36,050 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:26:36,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:36,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:36,051 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:36,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-03-01 17:26:36,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:36,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:36,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:36,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:36,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:36,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:36,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:36,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:36,313 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:36,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:26:36,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:36,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:36,330 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243475599] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:36,330 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:36,330 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:36,330 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224653189] [2022-03-01 17:26:36,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:36,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:36,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:36,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:36,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:36,331 INFO L87 Difference]: Start difference. First operand 61 states and 139 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:36,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:36,469 INFO L93 Difference]: Finished difference Result 107 states and 214 transitions. [2022-03-01 17:26:36,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:26:36,470 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:36,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:36,470 INFO L225 Difference]: With dead ends: 107 [2022-03-01 17:26:36,470 INFO L226 Difference]: Without dead ends: 107 [2022-03-01 17:26:36,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:36,471 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:36,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 36 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:36,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-01 17:26:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 64. [2022-03-01 17:26:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.3968253968253967) internal successors, (151), 63 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 151 transitions. [2022-03-01 17:26:36,474 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 151 transitions. Word has length 13 [2022-03-01 17:26:36,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:36,474 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 151 transitions. [2022-03-01 17:26:36,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:36,474 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 151 transitions. [2022-03-01 17:26:36,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:36,474 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:36,474 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:36,497 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:36,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:36,697 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:36,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:36,697 INFO L85 PathProgramCache]: Analyzing trace with hash 559080565, now seen corresponding path program 20 times [2022-03-01 17:26:36,698 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:36,698 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721696473] [2022-03-01 17:26:36,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:36,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:36,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:36,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721696473] [2022-03-01 17:26:36,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721696473] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:36,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162100218] [2022-03-01 17:26:36,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:26:36,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:36,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:36,769 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:36,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-03-01 17:26:36,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:36,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:36,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:36,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:36,872 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:36,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:36,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:36,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:36,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:36,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:37,066 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:37,067 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:37,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:37,081 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162100218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:37,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:37,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:37,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890335829] [2022-03-01 17:26:37,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:37,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:37,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:37,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:37,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:37,082 INFO L87 Difference]: Start difference. First operand 64 states and 151 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:37,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:37,384 INFO L93 Difference]: Finished difference Result 102 states and 207 transitions. [2022-03-01 17:26:37,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:26:37,384 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:37,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:37,385 INFO L225 Difference]: With dead ends: 102 [2022-03-01 17:26:37,385 INFO L226 Difference]: Without dead ends: 97 [2022-03-01 17:26:37,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:26:37,385 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 54 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:37,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 22 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:37,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-01 17:26:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-03-01 17:26:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.409090909090909) internal successors, (159), 66 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:37,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 159 transitions. [2022-03-01 17:26:37,388 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 159 transitions. Word has length 13 [2022-03-01 17:26:37,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:37,388 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 159 transitions. [2022-03-01 17:26:37,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:37,388 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 159 transitions. [2022-03-01 17:26:37,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:37,389 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:37,389 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:37,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-03-01 17:26:37,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:37,595 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:37,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:37,596 INFO L85 PathProgramCache]: Analyzing trace with hash -2017543025, now seen corresponding path program 21 times [2022-03-01 17:26:37,596 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:37,596 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223602291] [2022-03-01 17:26:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:37,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:37,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:37,663 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:37,663 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:37,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223602291] [2022-03-01 17:26:37,663 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223602291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:37,663 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558861161] [2022-03-01 17:26:37,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:26:37,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:37,664 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:37,665 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:37,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-03-01 17:26:37,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:26:37,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:37,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:37,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:37,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:37,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:37,750 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:37,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:37,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:37,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:37,869 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:37,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:37,872 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:37,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558861161] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:37,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:37,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:37,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248942072] [2022-03-01 17:26:37,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:37,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:37,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:37,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:37,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:37,881 INFO L87 Difference]: Start difference. First operand 67 states and 159 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:38,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:38,137 INFO L93 Difference]: Finished difference Result 88 states and 190 transitions. [2022-03-01 17:26:38,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:38,138 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:38,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:38,138 INFO L225 Difference]: With dead ends: 88 [2022-03-01 17:26:38,138 INFO L226 Difference]: Without dead ends: 88 [2022-03-01 17:26:38,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:26:38,139 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:38,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 18 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:38,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-03-01 17:26:38,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 61. [2022-03-01 17:26:38,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.3) internal successors, (138), 60 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:38,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 138 transitions. [2022-03-01 17:26:38,142 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 138 transitions. Word has length 13 [2022-03-01 17:26:38,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:38,142 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 138 transitions. [2022-03-01 17:26:38,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:38,142 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 138 transitions. [2022-03-01 17:26:38,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:38,143 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:38,143 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:38,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:38,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-03-01 17:26:38,343 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:38,344 INFO L85 PathProgramCache]: Analyzing trace with hash 566810963, now seen corresponding path program 22 times [2022-03-01 17:26:38,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:38,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178025091] [2022-03-01 17:26:38,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:38,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:38,397 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:38,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178025091] [2022-03-01 17:26:38,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178025091] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:38,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536499313] [2022-03-01 17:26:38,397 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:26:38,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:38,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:38,398 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:38,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-03-01 17:26:38,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:26:38,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:38,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:38,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:38,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:38,508 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:26:38,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:38,511 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:26:38,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:38,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:38,616 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:38,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:38,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:38,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536499313] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:38,626 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:38,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:38,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605396878] [2022-03-01 17:26:38,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:38,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:38,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:38,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:38,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:38,627 INFO L87 Difference]: Start difference. First operand 61 states and 138 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:38,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:38,733 INFO L93 Difference]: Finished difference Result 86 states and 190 transitions. [2022-03-01 17:26:38,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:26:38,734 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:38,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:38,734 INFO L225 Difference]: With dead ends: 86 [2022-03-01 17:26:38,734 INFO L226 Difference]: Without dead ends: 86 [2022-03-01 17:26:38,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:38,735 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:38,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 158 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2022-03-01 17:26:38,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-03-01 17:26:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 65. [2022-03-01 17:26:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.328125) internal successors, (149), 64 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:38,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 149 transitions. [2022-03-01 17:26:38,737 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 149 transitions. Word has length 13 [2022-03-01 17:26:38,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:38,738 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 149 transitions. [2022-03-01 17:26:38,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:38,738 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 149 transitions. [2022-03-01 17:26:38,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:38,738 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:38,738 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:38,758 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:38,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-03-01 17:26:38,951 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:38,952 INFO L85 PathProgramCache]: Analyzing trace with hash -2120635147, now seen corresponding path program 23 times [2022-03-01 17:26:38,952 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:38,952 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102431588] [2022-03-01 17:26:38,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:38,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:38,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:39,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:39,030 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:39,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102431588] [2022-03-01 17:26:39,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102431588] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:39,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257893278] [2022-03-01 17:26:39,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:26:39,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:39,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:39,036 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:39,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-03-01 17:26:39,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:39,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:39,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:39,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:26:39,180 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:39,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:26:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:39,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:39,293 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:39,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:39,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:39,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:39,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257893278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:39,305 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:39,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:39,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875865975] [2022-03-01 17:26:39,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:39,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:39,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:39,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:39,306 INFO L87 Difference]: Start difference. First operand 65 states and 149 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:39,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:39,393 INFO L93 Difference]: Finished difference Result 85 states and 186 transitions. [2022-03-01 17:26:39,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:26:39,394 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:39,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:39,394 INFO L225 Difference]: With dead ends: 85 [2022-03-01 17:26:39,394 INFO L226 Difference]: Without dead ends: 85 [2022-03-01 17:26:39,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:39,394 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 18 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:39,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 14 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 31 Unchecked, 0.1s Time] [2022-03-01 17:26:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-01 17:26:39,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2022-03-01 17:26:39,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.3333333333333335) internal successors, (154), 66 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:39,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 154 transitions. [2022-03-01 17:26:39,397 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 154 transitions. Word has length 13 [2022-03-01 17:26:39,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:39,397 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 154 transitions. [2022-03-01 17:26:39,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:39,397 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 154 transitions. [2022-03-01 17:26:39,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:39,397 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:39,397 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:39,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2022-03-01 17:26:39,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-03-01 17:26:39,599 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:39,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:39,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1546997875, now seen corresponding path program 24 times [2022-03-01 17:26:39,600 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:39,600 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037106526] [2022-03-01 17:26:39,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:39,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:39,665 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:39,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037106526] [2022-03-01 17:26:39,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037106526] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:39,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003312404] [2022-03-01 17:26:39,665 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:26:39,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:39,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:39,666 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:39,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-03-01 17:26:39,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:26:39,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:39,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:39,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:39,772 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:26:39,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:26:39,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:26:39,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:39,803 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:39,880 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:39,880 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:26:39,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:26:39,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:39,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003312404] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:39,888 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:39,888 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:26:39,888 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292594491] [2022-03-01 17:26:39,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:39,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:26:39,888 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:39,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:26:39,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:26:39,889 INFO L87 Difference]: Start difference. First operand 67 states and 154 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:40,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:40,048 INFO L93 Difference]: Finished difference Result 97 states and 217 transitions. [2022-03-01 17:26:40,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-01 17:26:40,048 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:40,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:40,049 INFO L225 Difference]: With dead ends: 97 [2022-03-01 17:26:40,049 INFO L226 Difference]: Without dead ends: 97 [2022-03-01 17:26:40,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:40,049 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 38 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:40,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 28 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-01 17:26:40,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 66. [2022-03-01 17:26:40,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.353846153846154) internal successors, (153), 65 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 153 transitions. [2022-03-01 17:26:40,052 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 153 transitions. Word has length 13 [2022-03-01 17:26:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:40,052 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 153 transitions. [2022-03-01 17:26:40,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 153 transitions. [2022-03-01 17:26:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:40,053 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:40,053 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:40,079 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:40,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:40,267 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:40,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1390433691, now seen corresponding path program 25 times [2022-03-01 17:26:40,268 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:40,268 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690431414] [2022-03-01 17:26:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:40,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:40,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:40,341 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:40,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690431414] [2022-03-01 17:26:40,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690431414] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:40,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987712183] [2022-03-01 17:26:40,341 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:26:40,341 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:40,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:40,343 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:40,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-03-01 17:26:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:40,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:40,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:40,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:26:40,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:26:40,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:40,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:40,615 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:40,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:26:40,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:40,631 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987712183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:40,631 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:40,631 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-03-01 17:26:40,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146203173] [2022-03-01 17:26:40,633 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:40,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-01 17:26:40,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:40,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-01 17:26:40,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-03-01 17:26:40,633 INFO L87 Difference]: Start difference. First operand 66 states and 153 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:40,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:40,867 INFO L93 Difference]: Finished difference Result 95 states and 210 transitions. [2022-03-01 17:26:40,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:40,868 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:40,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:40,868 INFO L225 Difference]: With dead ends: 95 [2022-03-01 17:26:40,868 INFO L226 Difference]: Without dead ends: 92 [2022-03-01 17:26:40,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:26:40,869 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 179 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 179 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:40,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 24 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 179 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:40,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-03-01 17:26:40,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 66. [2022-03-01 17:26:40,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3384615384615386) internal successors, (152), 65 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:40,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 152 transitions. [2022-03-01 17:26:40,871 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 152 transitions. Word has length 13 [2022-03-01 17:26:40,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:40,871 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 152 transitions. [2022-03-01 17:26:40,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:40,872 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 152 transitions. [2022-03-01 17:26:40,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:40,872 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:40,872 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:40,898 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:41,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-03-01 17:26:41,073 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:41,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:41,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1413378091, now seen corresponding path program 26 times [2022-03-01 17:26:41,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:41,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993888305] [2022-03-01 17:26:41,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:41,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:41,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:41,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993888305] [2022-03-01 17:26:41,145 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993888305] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:41,145 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623101534] [2022-03-01 17:26:41,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:26:41,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:41,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:41,146 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:41,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-03-01 17:26:41,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:41,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:41,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:41,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:41,298 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:41,299 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:26:41,302 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:41,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:26:41,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:41,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:41,422 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:41,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:26:41,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:26:41,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:41,430 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623101534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:41,430 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:41,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:26:41,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912882448] [2022-03-01 17:26:41,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:41,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:41,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:41,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:41,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:41,431 INFO L87 Difference]: Start difference. First operand 66 states and 152 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:41,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:41,650 INFO L93 Difference]: Finished difference Result 108 states and 239 transitions. [2022-03-01 17:26:41,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:41,650 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:41,651 INFO L225 Difference]: With dead ends: 108 [2022-03-01 17:26:41,651 INFO L226 Difference]: Without dead ends: 108 [2022-03-01 17:26:41,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:26:41,652 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:41,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 18 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 217 Invalid, 0 Unknown, 51 Unchecked, 0.1s Time] [2022-03-01 17:26:41,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-01 17:26:41,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 67. [2022-03-01 17:26:41,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.3484848484848486) internal successors, (155), 66 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:41,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 155 transitions. [2022-03-01 17:26:41,654 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 155 transitions. Word has length 13 [2022-03-01 17:26:41,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:41,655 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 155 transitions. [2022-03-01 17:26:41,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:41,655 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 155 transitions. [2022-03-01 17:26:41,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:41,655 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:41,655 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:41,686 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:41,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-03-01 17:26:41,856 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:41,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:41,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1961888497, now seen corresponding path program 27 times [2022-03-01 17:26:41,856 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:41,856 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703778851] [2022-03-01 17:26:41,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:41,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:41,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:41,928 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:41,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703778851] [2022-03-01 17:26:41,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703778851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:41,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708669290] [2022-03-01 17:26:41,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:26:41,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:41,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:41,929 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:41,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-03-01 17:26:41,950 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:26:41,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:41,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:41,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:42,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:42,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:26:42,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:42,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:26:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:42,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:42,201 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:42,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:26:42,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:42,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:42,218 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708669290] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:42,218 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:42,218 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:26:42,218 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482785254] [2022-03-01 17:26:42,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:42,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:42,219 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:42,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:42,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:42,219 INFO L87 Difference]: Start difference. First operand 67 states and 155 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:42,419 INFO L93 Difference]: Finished difference Result 99 states and 217 transitions. [2022-03-01 17:26:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:26:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:42,419 INFO L225 Difference]: With dead ends: 99 [2022-03-01 17:26:42,419 INFO L226 Difference]: Without dead ends: 97 [2022-03-01 17:26:42,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:26:42,420 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:42,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 26 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 191 Invalid, 0 Unknown, 1 Unchecked, 0.1s Time] [2022-03-01 17:26:42,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-01 17:26:42,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2022-03-01 17:26:42,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.3333333333333335) internal successors, (154), 66 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:42,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 154 transitions. [2022-03-01 17:26:42,422 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 154 transitions. Word has length 13 [2022-03-01 17:26:42,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:42,422 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 154 transitions. [2022-03-01 17:26:42,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:42,423 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 154 transitions. [2022-03-01 17:26:42,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:42,423 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:42,423 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:42,440 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2022-03-01 17:26:42,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:42,627 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:42,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:42,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1405647693, now seen corresponding path program 28 times [2022-03-01 17:26:42,628 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:42,628 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943610102] [2022-03-01 17:26:42,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:42,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:42,705 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:42,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943610102] [2022-03-01 17:26:42,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943610102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:42,705 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582075807] [2022-03-01 17:26:42,705 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:26:42,705 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:42,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:42,706 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:42,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-03-01 17:26:42,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:26:42,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:42,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:42,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:42,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:42,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:42,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:42,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:42,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:42,864 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:42,945 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:42,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:26:42,947 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:26:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:42,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582075807] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:42,953 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:42,953 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:26:42,953 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106460234] [2022-03-01 17:26:42,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:42,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:42,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:42,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:42,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:42,954 INFO L87 Difference]: Start difference. First operand 67 states and 154 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:43,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:43,318 INFO L93 Difference]: Finished difference Result 141 states and 287 transitions. [2022-03-01 17:26:43,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:26:43,319 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:43,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:43,319 INFO L225 Difference]: With dead ends: 141 [2022-03-01 17:26:43,319 INFO L226 Difference]: Without dead ends: 141 [2022-03-01 17:26:43,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:26:43,320 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 81 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:43,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 30 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:43,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-01 17:26:43,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 70. [2022-03-01 17:26:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.391304347826087) internal successors, (165), 69 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 165 transitions. [2022-03-01 17:26:43,322 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 165 transitions. Word has length 13 [2022-03-01 17:26:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:43,323 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 165 transitions. [2022-03-01 17:26:43,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 165 transitions. [2022-03-01 17:26:43,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:43,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:43,323 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:43,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:43,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:43,543 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:43,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:43,544 INFO L85 PathProgramCache]: Analyzing trace with hash -604031465, now seen corresponding path program 29 times [2022-03-01 17:26:43,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:43,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057078549] [2022-03-01 17:26:43,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:43,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:43,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:43,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:43,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057078549] [2022-03-01 17:26:43,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057078549] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:43,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566863772] [2022-03-01 17:26:43,626 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:26:43,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:43,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:43,627 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:43,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-03-01 17:26:43,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:43,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:43,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:43,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:43,734 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:43,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:43,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:43,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:43,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:43,929 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:43,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:26:43,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:43,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:43,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566863772] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:43,943 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:43,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:26:43,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938879702] [2022-03-01 17:26:43,943 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:43,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:43,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:43,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:43,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:43,944 INFO L87 Difference]: Start difference. First operand 70 states and 165 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:44,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:44,435 INFO L93 Difference]: Finished difference Result 134 states and 277 transitions. [2022-03-01 17:26:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:26:44,436 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:44,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:44,436 INFO L225 Difference]: With dead ends: 134 [2022-03-01 17:26:44,436 INFO L226 Difference]: Without dead ends: 131 [2022-03-01 17:26:44,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=464, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:26:44,437 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 67 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:44,437 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 44 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:26:44,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-01 17:26:44,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 73. [2022-03-01 17:26:44,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.4166666666666665) internal successors, (174), 72 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:44,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 174 transitions. [2022-03-01 17:26:44,440 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 174 transitions. Word has length 13 [2022-03-01 17:26:44,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:44,440 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 174 transitions. [2022-03-01 17:26:44,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:44,440 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 174 transitions. [2022-03-01 17:26:44,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:44,441 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:44,441 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:44,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:44,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-03-01 17:26:44,651 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:44,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:44,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1114312241, now seen corresponding path program 30 times [2022-03-01 17:26:44,652 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:44,652 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946079491] [2022-03-01 17:26:44,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:44,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:44,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:44,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:44,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946079491] [2022-03-01 17:26:44,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946079491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:44,736 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836106356] [2022-03-01 17:26:44,736 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:26:44,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:44,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:44,737 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:44,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-03-01 17:26:44,768 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:26:44,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:44,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:44,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:44,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:44,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:44,861 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:44,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:44,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:44,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:45,019 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:26:45,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:26:45,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:45,032 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:45,032 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836106356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:45,032 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:45,033 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-03-01 17:26:45,033 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302566361] [2022-03-01 17:26:45,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:45,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-01 17:26:45,033 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:45,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-01 17:26:45,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-03-01 17:26:45,033 INFO L87 Difference]: Start difference. First operand 73 states and 174 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:45,272 INFO L93 Difference]: Finished difference Result 124 states and 262 transitions. [2022-03-01 17:26:45,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:26:45,275 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:45,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:45,276 INFO L225 Difference]: With dead ends: 124 [2022-03-01 17:26:45,276 INFO L226 Difference]: Without dead ends: 124 [2022-03-01 17:26:45,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:26:45,277 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:45,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 58 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:45,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2022-03-01 17:26:45,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 71. [2022-03-01 17:26:45,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 2.3714285714285714) internal successors, (166), 70 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 166 transitions. [2022-03-01 17:26:45,280 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 166 transitions. Word has length 13 [2022-03-01 17:26:45,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:45,280 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 166 transitions. [2022-03-01 17:26:45,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 166 transitions. [2022-03-01 17:26:45,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:45,280 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:45,280 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:45,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-03-01 17:26:45,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:45,491 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:45,492 INFO L85 PathProgramCache]: Analyzing trace with hash 732792669, now seen corresponding path program 31 times [2022-03-01 17:26:45,492 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:45,492 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438618763] [2022-03-01 17:26:45,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:45,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:45,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:45,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:45,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438618763] [2022-03-01 17:26:45,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438618763] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:45,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834304151] [2022-03-01 17:26:45,546 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:26:45,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:45,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:45,547 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:45,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-03-01 17:26:45,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:45,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:45,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:45,665 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:45,666 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:26:45,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:45,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:26:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:45,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:45,779 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:45,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:45,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:45,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834304151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:45,789 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:45,789 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:45,789 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573086170] [2022-03-01 17:26:45,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:45,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:45,790 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:45,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:45,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:45,790 INFO L87 Difference]: Start difference. First operand 71 states and 166 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:45,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:45,961 INFO L93 Difference]: Finished difference Result 109 states and 243 transitions. [2022-03-01 17:26:45,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:26:45,961 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:45,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:45,962 INFO L225 Difference]: With dead ends: 109 [2022-03-01 17:26:45,962 INFO L226 Difference]: Without dead ends: 109 [2022-03-01 17:26:45,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:45,963 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:45,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 203 Invalid, 0 Unknown, 21 Unchecked, 0.1s Time] [2022-03-01 17:26:45,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-01 17:26:45,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 76. [2022-03-01 17:26:45,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.453333333333333) internal successors, (184), 75 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:45,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 184 transitions. [2022-03-01 17:26:45,966 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 184 transitions. Word has length 13 [2022-03-01 17:26:45,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:45,966 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 184 transitions. [2022-03-01 17:26:45,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:45,966 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 184 transitions. [2022-03-01 17:26:45,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:45,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:45,966 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:45,993 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:46,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-03-01 17:26:46,175 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:46,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:46,176 INFO L85 PathProgramCache]: Analyzing trace with hash -186908039, now seen corresponding path program 32 times [2022-03-01 17:26:46,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:46,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183275145] [2022-03-01 17:26:46,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:46,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:46,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:46,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183275145] [2022-03-01 17:26:46,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183275145] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:46,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752840598] [2022-03-01 17:26:46,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:26:46,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:46,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:46,252 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:46,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-03-01 17:26:46,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:46,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:46,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:46,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:46,383 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:46,384 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:26:46,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:46,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:26:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:46,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:46,512 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:46,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:26:46,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:46,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:46,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752840598] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:46,528 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:46,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:46,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822885239] [2022-03-01 17:26:46,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:46,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:46,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:46,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:46,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:46,529 INFO L87 Difference]: Start difference. First operand 76 states and 184 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:46,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:46,711 INFO L93 Difference]: Finished difference Result 96 states and 215 transitions. [2022-03-01 17:26:46,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:26:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:46,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:46,712 INFO L225 Difference]: With dead ends: 96 [2022-03-01 17:26:46,712 INFO L226 Difference]: Without dead ends: 94 [2022-03-01 17:26:46,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:26:46,713 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:46,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 16 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 10 Unchecked, 0.1s Time] [2022-03-01 17:26:46,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-03-01 17:26:46,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 77. [2022-03-01 17:26:46,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.4342105263157894) internal successors, (185), 76 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:46,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 185 transitions. [2022-03-01 17:26:46,716 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 185 transitions. Word has length 13 [2022-03-01 17:26:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:46,716 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 185 transitions. [2022-03-01 17:26:46,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 185 transitions. [2022-03-01 17:26:46,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:46,716 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:46,716 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:46,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:46,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:46,935 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:46,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:46,935 INFO L85 PathProgramCache]: Analyzing trace with hash 740523067, now seen corresponding path program 33 times [2022-03-01 17:26:46,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:46,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960564451] [2022-03-01 17:26:46,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:46,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:46,999 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:46,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960564451] [2022-03-01 17:26:46,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960564451] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:46,999 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517263252] [2022-03-01 17:26:46,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:26:46,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:46,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:47,000 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:47,001 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-03-01 17:26:47,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:26:47,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:47,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:47,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:47,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:47,095 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:47,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:47,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:47,232 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:47,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:47,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:47,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517263252] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:47,247 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:47,247 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:47,247 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747034420] [2022-03-01 17:26:47,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:47,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:47,248 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:47,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:47,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:47,248 INFO L87 Difference]: Start difference. First operand 77 states and 185 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:47,478 INFO L93 Difference]: Finished difference Result 129 states and 264 transitions. [2022-03-01 17:26:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:47,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:47,478 INFO L225 Difference]: With dead ends: 129 [2022-03-01 17:26:47,479 INFO L226 Difference]: Without dead ends: 129 [2022-03-01 17:26:47,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:26:47,479 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:47,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 42 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-01 17:26:47,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 75. [2022-03-01 17:26:47,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.364864864864865) internal successors, (175), 74 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 175 transitions. [2022-03-01 17:26:47,484 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 175 transitions. Word has length 13 [2022-03-01 17:26:47,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:47,484 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 175 transitions. [2022-03-01 17:26:47,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:47,484 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 175 transitions. [2022-03-01 17:26:47,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:47,484 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:47,484 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:47,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-03-01 17:26:47,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-03-01 17:26:47,707 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:47,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:47,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1542139295, now seen corresponding path program 34 times [2022-03-01 17:26:47,707 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:47,707 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425764673] [2022-03-01 17:26:47,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:47,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:47,772 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:47,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425764673] [2022-03-01 17:26:47,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425764673] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:47,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865883606] [2022-03-01 17:26:47,772 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:26:47,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:47,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:47,774 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:47,774 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-03-01 17:26:47,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:26:47,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:47,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:47,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:47,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:47,861 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:47,863 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:47,863 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:47,937 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:47,997 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:47,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:26:47,999 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:48,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:48,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865883606] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:48,011 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:48,012 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:48,012 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761034967] [2022-03-01 17:26:48,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:48,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:48,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:48,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:48,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:48,012 INFO L87 Difference]: Start difference. First operand 75 states and 175 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:48,194 INFO L93 Difference]: Finished difference Result 103 states and 219 transitions. [2022-03-01 17:26:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:26:48,194 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:48,195 INFO L225 Difference]: With dead ends: 103 [2022-03-01 17:26:48,195 INFO L226 Difference]: Without dead ends: 100 [2022-03-01 17:26:48,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:26:48,195 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 43 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:48,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 20 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:48,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-03-01 17:26:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 77. [2022-03-01 17:26:48,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 2.3815789473684212) internal successors, (181), 76 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:48,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 181 transitions. [2022-03-01 17:26:48,198 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 181 transitions. Word has length 13 [2022-03-01 17:26:48,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:48,198 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 181 transitions. [2022-03-01 17:26:48,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:48,198 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 181 transitions. [2022-03-01 17:26:48,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:48,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:48,199 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:48,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:48,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-03-01 17:26:48,407 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1034484295, now seen corresponding path program 35 times [2022-03-01 17:26:48,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:48,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638056061] [2022-03-01 17:26:48,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:48,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:48,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:48,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:48,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638056061] [2022-03-01 17:26:48,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638056061] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:48,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782286441] [2022-03-01 17:26:48,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:26:48,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:48,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:48,466 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:48,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-03-01 17:26:48,487 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:26:48,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:48,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:48,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:48,543 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:48,544 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:48,545 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:48,546 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:48,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:48,602 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:48,662 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:48,662 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:26:48,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:48,681 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:48,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782286441] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:48,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:48,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:48,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627957274] [2022-03-01 17:26:48,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:48,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:48,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:48,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:48,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:48,682 INFO L87 Difference]: Start difference. First operand 77 states and 181 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:48,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:48,797 INFO L93 Difference]: Finished difference Result 96 states and 213 transitions. [2022-03-01 17:26:48,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:26:48,797 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:48,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:48,797 INFO L225 Difference]: With dead ends: 96 [2022-03-01 17:26:48,797 INFO L226 Difference]: Without dead ends: 96 [2022-03-01 17:26:48,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:48,798 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 23 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:48,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:48,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-03-01 17:26:48,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 75. [2022-03-01 17:26:48,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.3378378378378377) internal successors, (173), 74 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 173 transitions. [2022-03-01 17:26:48,800 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 173 transitions. Word has length 13 [2022-03-01 17:26:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:48,800 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 173 transitions. [2022-03-01 17:26:48,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:48,800 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 173 transitions. [2022-03-01 17:26:48,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:48,800 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:48,800 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:48,819 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:49,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-03-01 17:26:49,011 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:49,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:49,012 INFO L85 PathProgramCache]: Analyzing trace with hash -748881929, now seen corresponding path program 36 times [2022-03-01 17:26:49,012 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:49,012 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415921420] [2022-03-01 17:26:49,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:49,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:49,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:49,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:49,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415921420] [2022-03-01 17:26:49,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415921420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:49,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50455128] [2022-03-01 17:26:49,086 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:26:49,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:49,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:49,089 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:49,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-03-01 17:26:49,115 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:26:49,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:49,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:49,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:49,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:49,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:49,187 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:49,187 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:49,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:49,320 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:49,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:26:49,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:26:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:49,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50455128] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:49,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:49,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:49,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169985469] [2022-03-01 17:26:49,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:49,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:49,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:49,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:49,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:49,337 INFO L87 Difference]: Start difference. First operand 75 states and 173 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:49,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:49,483 INFO L93 Difference]: Finished difference Result 123 states and 258 transitions. [2022-03-01 17:26:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:26:49,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:49,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:49,484 INFO L225 Difference]: With dead ends: 123 [2022-03-01 17:26:49,484 INFO L226 Difference]: Without dead ends: 123 [2022-03-01 17:26:49,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:26:49,484 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:49,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 26 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:49,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-01 17:26:49,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 78. [2022-03-01 17:26:49,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4025974025974026) internal successors, (185), 77 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:49,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 185 transitions. [2022-03-01 17:26:49,487 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 185 transitions. Word has length 13 [2022-03-01 17:26:49,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:49,487 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 185 transitions. [2022-03-01 17:26:49,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:49,487 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 185 transitions. [2022-03-01 17:26:49,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:49,487 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:49,488 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:49,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:49,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-03-01 17:26:49,704 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:49,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:49,704 INFO L85 PathProgramCache]: Analyzing trace with hash 52734299, now seen corresponding path program 37 times [2022-03-01 17:26:49,704 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:49,704 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890118958] [2022-03-01 17:26:49,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:49,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:49,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:49,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:49,767 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:49,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890118958] [2022-03-01 17:26:49,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890118958] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:49,767 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960814978] [2022-03-01 17:26:49,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:26:49,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:49,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:49,768 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:49,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-03-01 17:26:49,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:49,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:49,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:49,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:49,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:49,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:49,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:49,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:49,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:49,989 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:49,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:49,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:49,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:49,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960814978] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:49,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:49,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:49,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514486156] [2022-03-01 17:26:49,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:49,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:49,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:49,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:49,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:49,999 INFO L87 Difference]: Start difference. First operand 78 states and 185 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:50,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:50,277 INFO L93 Difference]: Finished difference Result 123 states and 256 transitions. [2022-03-01 17:26:50,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:26:50,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:50,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:50,278 INFO L225 Difference]: With dead ends: 123 [2022-03-01 17:26:50,278 INFO L226 Difference]: Without dead ends: 117 [2022-03-01 17:26:50,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:26:50,278 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 54 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:50,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 22 Invalid, 308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:50,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-01 17:26:50,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 82. [2022-03-01 17:26:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.419753086419753) internal successors, (196), 81 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:50,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 196 transitions. [2022-03-01 17:26:50,281 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 196 transitions. Word has length 13 [2022-03-01 17:26:50,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:50,281 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 196 transitions. [2022-03-01 17:26:50,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:50,281 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 196 transitions. [2022-03-01 17:26:50,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:50,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:50,282 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:50,301 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-03-01 17:26:50,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:50,495 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:50,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:50,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1771078005, now seen corresponding path program 38 times [2022-03-01 17:26:50,496 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:50,496 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807124702] [2022-03-01 17:26:50,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:50,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:50,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:50,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807124702] [2022-03-01 17:26:50,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807124702] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:50,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053144492] [2022-03-01 17:26:50,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:26:50,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:50,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:50,563 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:50,575 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-03-01 17:26:50,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:50,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:50,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:50,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:50,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:50,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:26:50,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:50,649 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:26:50,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:50,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:50,775 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:50,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:50,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:50,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1053144492] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:50,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:50,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:50,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584271371] [2022-03-01 17:26:50,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:50,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:50,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:50,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:50,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:50,794 INFO L87 Difference]: Start difference. First operand 82 states and 196 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:50,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:50,963 INFO L93 Difference]: Finished difference Result 108 states and 235 transitions. [2022-03-01 17:26:50,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:50,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:50,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:50,963 INFO L225 Difference]: With dead ends: 108 [2022-03-01 17:26:50,963 INFO L226 Difference]: Without dead ends: 108 [2022-03-01 17:26:50,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:26:50,964 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:50,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 14 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:50,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-03-01 17:26:50,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 79. [2022-03-01 17:26:50,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.3461538461538463) internal successors, (183), 78 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:50,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 183 transitions. [2022-03-01 17:26:50,967 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 183 transitions. Word has length 13 [2022-03-01 17:26:50,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:50,967 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 183 transitions. [2022-03-01 17:26:50,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:50,967 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 183 transitions. [2022-03-01 17:26:50,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-03-01 17:26:50,967 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:50,967 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:50,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:51,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:51,182 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:51,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:51,183 INFO L85 PathProgramCache]: Analyzing trace with hash 60464697, now seen corresponding path program 39 times [2022-03-01 17:26:51,183 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:51,183 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615691324] [2022-03-01 17:26:51,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:51,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:51,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:51,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615691324] [2022-03-01 17:26:51,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615691324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:51,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702948723] [2022-03-01 17:26:51,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:26:51,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:51,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:51,249 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:51,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-03-01 17:26:51,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:26:51,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:51,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2022-03-01 17:26:51,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:51,352 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:51,352 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:26:51,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:51,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:26:51,359 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:51,360 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:26:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:51,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:51,459 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:26:51,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:26:51,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:26:51,469 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:51,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702948723] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:51,469 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:51,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2022-03-01 17:26:51,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657445565] [2022-03-01 17:26:51,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:51,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-03-01 17:26:51,470 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:51,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-03-01 17:26:51,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-03-01 17:26:51,470 INFO L87 Difference]: Start difference. First operand 79 states and 183 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:51,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:51,587 INFO L93 Difference]: Finished difference Result 106 states and 236 transitions. [2022-03-01 17:26:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:51,587 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-03-01 17:26:51,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:51,588 INFO L225 Difference]: With dead ends: 106 [2022-03-01 17:26:51,588 INFO L226 Difference]: Without dead ends: 106 [2022-03-01 17:26:51,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:26:51,588 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:51,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 16 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:26:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-03-01 17:26:51,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2022-03-01 17:26:51,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.3461538461538463) internal successors, (183), 78 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:51,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 183 transitions. [2022-03-01 17:26:51,590 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 183 transitions. Word has length 13 [2022-03-01 17:26:51,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:51,591 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 183 transitions. [2022-03-01 17:26:51,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 12 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:51,591 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 183 transitions. [2022-03-01 17:26:51,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:26:51,591 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:51,591 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:51,614 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-03-01 17:26:51,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2022-03-01 17:26:51,807 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:51,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:51,807 INFO L85 PathProgramCache]: Analyzing trace with hash -127183777, now seen corresponding path program 40 times [2022-03-01 17:26:51,807 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:51,807 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934639737] [2022-03-01 17:26:51,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:51,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:52,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:52,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934639737] [2022-03-01 17:26:52,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934639737] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:52,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300104446] [2022-03-01 17:26:52,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:26:52,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:52,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:52,183 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:52,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-03-01 17:26:52,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:26:52,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:26:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:52,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:26:52,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:26:52,626 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:52,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:26:52,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:52,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:26:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:52,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:53,222 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:26:53,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:26:53,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:53,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:53,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:26:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:53,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300104446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:53,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:53,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:26:53,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847453804] [2022-03-01 17:26:53,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:53,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:26:53,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:53,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:26:53,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:26:53,570 INFO L87 Difference]: Start difference. First operand 79 states and 183 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:53,895 INFO L93 Difference]: Finished difference Result 125 states and 272 transitions. [2022-03-01 17:26:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:26:53,895 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:26:53,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:53,896 INFO L225 Difference]: With dead ends: 125 [2022-03-01 17:26:53,896 INFO L226 Difference]: Without dead ends: 123 [2022-03-01 17:26:53,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:26:53,896 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 172 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:53,896 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 28 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 248 Invalid, 0 Unknown, 172 Unchecked, 0.1s Time] [2022-03-01 17:26:53,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-01 17:26:53,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 85. [2022-03-01 17:26:53,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.3095238095238093) internal successors, (194), 84 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:53,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 194 transitions. [2022-03-01 17:26:53,899 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 194 transitions. Word has length 14 [2022-03-01 17:26:53,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:53,899 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 194 transitions. [2022-03-01 17:26:53,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:53,899 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 194 transitions. [2022-03-01 17:26:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:26:53,900 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:53,900 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:53,922 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-03-01 17:26:54,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:54,122 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:54,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:54,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1446621923, now seen corresponding path program 41 times [2022-03-01 17:26:54,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:54,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408076896] [2022-03-01 17:26:54,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:54,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:54,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:54,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:54,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408076896] [2022-03-01 17:26:54,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408076896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:54,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956422738] [2022-03-01 17:26:54,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:26:54,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:54,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:54,578 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:54,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-03-01 17:26:54,604 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:26:54,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:54,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:26:54,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:54,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:26:54,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:26:54,941 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:54,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:26:54,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:54,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:26:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:54,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:55,464 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:26:55,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 226 treesize of output 206 [2022-03-01 17:26:55,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:55,482 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:55,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 190 treesize of output 184 [2022-03-01 17:26:55,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:55,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956422738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:55,774 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:55,774 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:26:55,774 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008336573] [2022-03-01 17:26:55,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:55,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:26:55,775 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:55,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:26:55,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:26:55,775 INFO L87 Difference]: Start difference. First operand 85 states and 194 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:56,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:56,054 INFO L93 Difference]: Finished difference Result 121 states and 276 transitions. [2022-03-01 17:26:56,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:26:56,054 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:26:56,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:56,055 INFO L225 Difference]: With dead ends: 121 [2022-03-01 17:26:56,055 INFO L226 Difference]: Without dead ends: 118 [2022-03-01 17:26:56,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:26:56,055 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:56,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 13 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 224 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-03-01 17:26:56,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-01 17:26:56,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2022-03-01 17:26:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.310344827586207) internal successors, (201), 87 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:56,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 201 transitions. [2022-03-01 17:26:56,058 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 201 transitions. Word has length 14 [2022-03-01 17:26:56,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:56,058 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 201 transitions. [2022-03-01 17:26:56,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:56,058 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 201 transitions. [2022-03-01 17:26:56,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:26:56,058 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:56,058 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:56,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-03-01 17:26:56,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-03-01 17:26:56,279 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:56,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:56,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1617324353, now seen corresponding path program 42 times [2022-03-01 17:26:56,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:56,280 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944272679] [2022-03-01 17:26:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:56,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:56,667 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:56,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944272679] [2022-03-01 17:26:56,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944272679] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:56,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615767185] [2022-03-01 17:26:56,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:26:56,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:56,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:56,668 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:56,669 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-03-01 17:26:56,697 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:26:56,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:26:56,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:26:56,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:57,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:26:57,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:26:57,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:57,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:26:57,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:57,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:26:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:57,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:57,620 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:26:57,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 226 treesize of output 206 [2022-03-01 17:26:57,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:57,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:57,642 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 190 treesize of output 184 [2022-03-01 17:26:57,926 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:57,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615767185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:26:57,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:26:57,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:26:57,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336575912] [2022-03-01 17:26:57,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:26:57,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:26:57,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:26:57,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:26:57,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:26:57,927 INFO L87 Difference]: Start difference. First operand 88 states and 201 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:58,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:26:58,115 INFO L93 Difference]: Finished difference Result 125 states and 283 transitions. [2022-03-01 17:26:58,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:26:58,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:26:58,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:26:58,116 INFO L225 Difference]: With dead ends: 125 [2022-03-01 17:26:58,116 INFO L226 Difference]: Without dead ends: 123 [2022-03-01 17:26:58,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:26:58,117 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:26:58,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 13 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 87 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-03-01 17:26:58,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-01 17:26:58,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 90. [2022-03-01 17:26:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 205 transitions. [2022-03-01 17:26:58,119 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 205 transitions. Word has length 14 [2022-03-01 17:26:58,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:26:58,119 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 205 transitions. [2022-03-01 17:26:58,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:26:58,119 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 205 transitions. [2022-03-01 17:26:58,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:26:58,120 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:26:58,120 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:26:58,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-03-01 17:26:58,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:58,327 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:26:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:26:58,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1819363059, now seen corresponding path program 43 times [2022-03-01 17:26:58,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:26:58,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961761480] [2022-03-01 17:26:58,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:26:58,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:26:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:58,760 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:26:58,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961761480] [2022-03-01 17:26:58,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961761480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:26:58,760 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631287948] [2022-03-01 17:26:58,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:26:58,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:26:58,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:26:58,762 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:26:58,763 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-03-01 17:26:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:26:58,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:26:58,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:26:59,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:26:59,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:26:59,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:59,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:26:59,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:59,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:26:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:26:59,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:26:59,677 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:26:59,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 226 treesize of output 206 [2022-03-01 17:26:59,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:26:59,695 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:26:59,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 190 treesize of output 184 [2022-03-01 17:27:00,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:00,188 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631287948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:00,188 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:00,188 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:27:00,188 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214013640] [2022-03-01 17:27:00,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:00,188 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:27:00,188 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:00,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:27:00,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:27:00,189 INFO L87 Difference]: Start difference. First operand 90 states and 205 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:00,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:00,459 INFO L93 Difference]: Finished difference Result 124 states and 280 transitions. [2022-03-01 17:27:00,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:27:00,459 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:00,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:00,459 INFO L225 Difference]: With dead ends: 124 [2022-03-01 17:27:00,460 INFO L226 Difference]: Without dead ends: 122 [2022-03-01 17:27:00,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:27:00,463 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:00,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 11 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 167 Invalid, 0 Unknown, 86 Unchecked, 0.1s Time] [2022-03-01 17:27:00,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-03-01 17:27:00,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 90. [2022-03-01 17:27:00,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 205 transitions. [2022-03-01 17:27:00,465 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 205 transitions. Word has length 14 [2022-03-01 17:27:00,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:00,465 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 205 transitions. [2022-03-01 17:27:00,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:00,465 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 205 transitions. [2022-03-01 17:27:00,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:00,465 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:00,465 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:00,481 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:00,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:00,666 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:00,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:00,666 INFO L85 PathProgramCache]: Analyzing trace with hash -400541601, now seen corresponding path program 44 times [2022-03-01 17:27:00,666 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:00,666 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802637417] [2022-03-01 17:27:00,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:00,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:00,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:00,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:00,846 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:00,846 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802637417] [2022-03-01 17:27:00,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802637417] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:00,847 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644513913] [2022-03-01 17:27:00,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:27:00,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:00,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:00,848 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:00,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-03-01 17:27:00,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:27:00,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:00,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:00,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:01,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:01,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:01,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:01,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:01,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:01,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:01,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:01,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:01,769 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:01,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:27:01,772 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:01,787 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:01,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:27:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:02,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644513913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:02,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:02,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-01 17:27:02,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561066011] [2022-03-01 17:27:02,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:02,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:27:02,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:27:02,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:27:02,030 INFO L87 Difference]: Start difference. First operand 90 states and 205 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:02,299 INFO L93 Difference]: Finished difference Result 118 states and 270 transitions. [2022-03-01 17:27:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:27:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:02,300 INFO L225 Difference]: With dead ends: 118 [2022-03-01 17:27:02,300 INFO L226 Difference]: Without dead ends: 115 [2022-03-01 17:27:02,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:27:02,300 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 12 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:02,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 11 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 173 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-01 17:27:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-01 17:27:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 93. [2022-03-01 17:27:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.3369565217391304) internal successors, (215), 92 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 215 transitions. [2022-03-01 17:27:02,302 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 215 transitions. Word has length 14 [2022-03-01 17:27:02,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:02,302 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 215 transitions. [2022-03-01 17:27:02,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 215 transitions. [2022-03-01 17:27:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:02,303 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:02,303 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:02,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-03-01 17:27:02,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-03-01 17:27:02,503 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:02,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:02,504 INFO L85 PathProgramCache]: Analyzing trace with hash 1206979585, now seen corresponding path program 45 times [2022-03-01 17:27:02,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:02,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474635476] [2022-03-01 17:27:02,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:02,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:02,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:02,817 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:02,817 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474635476] [2022-03-01 17:27:02,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474635476] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:02,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451679550] [2022-03-01 17:27:02,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:27:02,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:02,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:02,819 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:02,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-03-01 17:27:02,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:27:02,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:02,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:02,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:03,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:03,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:03,175 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:03,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:03,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:03,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:03,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:03,763 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:03,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:27:03,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:03,782 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:03,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:27:04,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:04,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451679550] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:04,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:04,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:04,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244379103] [2022-03-01 17:27:04,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:04,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:04,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:04,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:04,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:04,030 INFO L87 Difference]: Start difference. First operand 93 states and 215 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:04,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:04,395 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2022-03-01 17:27:04,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:27:04,395 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:04,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:04,396 INFO L225 Difference]: With dead ends: 119 [2022-03-01 17:27:04,396 INFO L226 Difference]: Without dead ends: 116 [2022-03-01 17:27:04,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:27:04,396 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:04,396 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 14 Invalid, 312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 251 Invalid, 0 Unknown, 55 Unchecked, 0.1s Time] [2022-03-01 17:27:04,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-03-01 17:27:04,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2022-03-01 17:27:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.3369565217391304) internal successors, (215), 92 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:04,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 215 transitions. [2022-03-01 17:27:04,398 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 215 transitions. Word has length 14 [2022-03-01 17:27:04,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:04,399 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 215 transitions. [2022-03-01 17:27:04,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:04,399 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 215 transitions. [2022-03-01 17:27:04,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:04,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:04,399 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:04,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:04,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-03-01 17:27:04,603 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:04,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:04,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1377682015, now seen corresponding path program 46 times [2022-03-01 17:27:04,604 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:04,604 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807040357] [2022-03-01 17:27:04,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:04,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:04,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:04,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:04,949 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:04,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807040357] [2022-03-01 17:27:04,949 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807040357] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:04,949 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946795478] [2022-03-01 17:27:04,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:27:04,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:04,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:04,950 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:04,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-03-01 17:27:04,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:27:04,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:04,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:04,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:05,377 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:05,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:05,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:05,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:05,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:05,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:05,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:06,016 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:06,017 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:27:06,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:06,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:06,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:27:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:06,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946795478] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:06,348 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:06,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:06,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559862177] [2022-03-01 17:27:06,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:06,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:06,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:06,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:06,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:06,349 INFO L87 Difference]: Start difference. First operand 93 states and 215 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:06,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:06,728 INFO L93 Difference]: Finished difference Result 120 states and 271 transitions. [2022-03-01 17:27:06,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:27:06,728 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:06,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:06,729 INFO L225 Difference]: With dead ends: 120 [2022-03-01 17:27:06,729 INFO L226 Difference]: Without dead ends: 118 [2022-03-01 17:27:06,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:27:06,729 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 9 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 24 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:06,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 15 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 266 Invalid, 0 Unknown, 24 Unchecked, 0.2s Time] [2022-03-01 17:27:06,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-03-01 17:27:06,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 93. [2022-03-01 17:27:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.3369565217391304) internal successors, (215), 92 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:06,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 215 transitions. [2022-03-01 17:27:06,731 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 215 transitions. Word has length 14 [2022-03-01 17:27:06,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:06,731 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 215 transitions. [2022-03-01 17:27:06,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:06,731 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 215 transitions. [2022-03-01 17:27:06,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:06,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:06,732 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:06,750 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-03-01 17:27:06,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-03-01 17:27:06,943 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:06,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:06,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1358940377, now seen corresponding path program 47 times [2022-03-01 17:27:06,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:06,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710300736] [2022-03-01 17:27:06,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:06,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:07,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:07,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710300736] [2022-03-01 17:27:07,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710300736] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:07,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943668637] [2022-03-01 17:27:07,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:27:07,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:07,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:07,444 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:07,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-03-01 17:27:07,468 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:27:07,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:07,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:07,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:07,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:07,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:07,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:07,807 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:07,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:07,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:07,866 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:08,419 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:08,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:27:08,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:08,445 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:08,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:27:08,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:08,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943668637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:08,704 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:08,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:27:08,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499402369] [2022-03-01 17:27:08,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:08,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:27:08,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:08,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:27:08,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:27:08,705 INFO L87 Difference]: Start difference. First operand 93 states and 215 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:09,244 INFO L93 Difference]: Finished difference Result 120 states and 273 transitions. [2022-03-01 17:27:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:27:09,244 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:09,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:09,245 INFO L225 Difference]: With dead ends: 120 [2022-03-01 17:27:09,245 INFO L226 Difference]: Without dead ends: 117 [2022-03-01 17:27:09,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:27:09,245 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:09,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 18 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 339 Invalid, 0 Unknown, 61 Unchecked, 0.2s Time] [2022-03-01 17:27:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-01 17:27:09,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 94. [2022-03-01 17:27:09,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3333333333333335) internal successors, (217), 93 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 217 transitions. [2022-03-01 17:27:09,249 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 217 transitions. Word has length 14 [2022-03-01 17:27:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:09,249 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 217 transitions. [2022-03-01 17:27:09,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 217 transitions. [2022-03-01 17:27:09,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:09,250 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:09,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:09,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:09,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:09,471 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:09,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:09,472 INFO L85 PathProgramCache]: Analyzing trace with hash -1188237947, now seen corresponding path program 48 times [2022-03-01 17:27:09,472 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:09,472 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118547272] [2022-03-01 17:27:09,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:09,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:09,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:10,057 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:10,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118547272] [2022-03-01 17:27:10,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118547272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:10,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045755503] [2022-03-01 17:27:10,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:27:10,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:10,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:10,059 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:10,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-03-01 17:27:10,082 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:27:10,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:10,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:10,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:10,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:10,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:10,485 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:10,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:10,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:10,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:10,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:11,110 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:11,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:27:11,115 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:11,129 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:11,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:27:11,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:11,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045755503] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:11,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:11,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2022-03-01 17:27:11,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900828179] [2022-03-01 17:27:11,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:11,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:27:11,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:11,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:27:11,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:27:11,410 INFO L87 Difference]: Start difference. First operand 94 states and 217 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:12,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:12,013 INFO L93 Difference]: Finished difference Result 130 states and 294 transitions. [2022-03-01 17:27:12,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:27:12,013 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:12,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:12,014 INFO L225 Difference]: With dead ends: 130 [2022-03-01 17:27:12,014 INFO L226 Difference]: Without dead ends: 127 [2022-03-01 17:27:12,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:27:12,014 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:12,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 17 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 357 Invalid, 0 Unknown, 94 Unchecked, 0.2s Time] [2022-03-01 17:27:12,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-01 17:27:12,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 94. [2022-03-01 17:27:12,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3440860215053765) internal successors, (218), 93 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 218 transitions. [2022-03-01 17:27:12,016 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 218 transitions. Word has length 14 [2022-03-01 17:27:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:12,016 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 218 transitions. [2022-03-01 17:27:12,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 218 transitions. [2022-03-01 17:27:12,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:12,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:12,017 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:12,034 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-03-01 17:27:12,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2022-03-01 17:27:12,218 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:12,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:12,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1602893341, now seen corresponding path program 49 times [2022-03-01 17:27:12,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:12,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840016743] [2022-03-01 17:27:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:12,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:12,541 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:12,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840016743] [2022-03-01 17:27:12,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840016743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:12,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629444245] [2022-03-01 17:27:12,541 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:27:12,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:12,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:12,542 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:12,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-03-01 17:27:12,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:12,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:12,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:12,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:12,900 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:27:12,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 83 treesize of output 72 [2022-03-01 17:27:12,906 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:27:12,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-03-01 17:27:12,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:12,972 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:13,686 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:13,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 241 treesize of output 217 [2022-03-01 17:27:13,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:13,704 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:13,704 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 201 treesize of output 191 [2022-03-01 17:27:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:14,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629444245] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:14,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:14,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:27:14,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725996871] [2022-03-01 17:27:14,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:14,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:14,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:14,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:14,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:14,008 INFO L87 Difference]: Start difference. First operand 94 states and 218 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:15,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:15,181 INFO L93 Difference]: Finished difference Result 204 states and 421 transitions. [2022-03-01 17:27:15,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:27:15,182 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:15,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:15,182 INFO L225 Difference]: With dead ends: 204 [2022-03-01 17:27:15,182 INFO L226 Difference]: Without dead ends: 195 [2022-03-01 17:27:15,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:27:15,183 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 86 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 601 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:15,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 51 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 601 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:27:15,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-03-01 17:27:15,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 106. [2022-03-01 17:27:15,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.4952380952380953) internal successors, (262), 105 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:15,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 262 transitions. [2022-03-01 17:27:15,186 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 262 transitions. Word has length 14 [2022-03-01 17:27:15,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:15,186 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 262 transitions. [2022-03-01 17:27:15,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:15,186 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 262 transitions. [2022-03-01 17:27:15,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:15,186 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:15,186 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:15,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:15,409 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:15,409 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:15,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:15,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1595162943, now seen corresponding path program 50 times [2022-03-01 17:27:15,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:15,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969039812] [2022-03-01 17:27:15,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:15,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:15,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:15,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:15,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:15,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969039812] [2022-03-01 17:27:15,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969039812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:15,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150610819] [2022-03-01 17:27:15,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:27:15,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:15,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:15,563 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:15,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-03-01 17:27:15,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:27:15,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:15,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:15,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:15,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:15,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:15,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:15,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:15,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:15,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:15,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:15,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:16,637 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:16,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:27:16,641 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:16,655 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:16,655 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:27:16,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:16,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150610819] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:16,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:16,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-01 17:27:16,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963581649] [2022-03-01 17:27:16,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:16,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:27:16,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:16,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:27:16,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:27:16,938 INFO L87 Difference]: Start difference. First operand 106 states and 262 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:17,332 INFO L93 Difference]: Finished difference Result 135 states and 319 transitions. [2022-03-01 17:27:17,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:27:17,332 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:17,333 INFO L225 Difference]: With dead ends: 135 [2022-03-01 17:27:17,333 INFO L226 Difference]: Without dead ends: 131 [2022-03-01 17:27:17,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:27:17,333 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 29 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:17,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 20 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 272 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-03-01 17:27:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-01 17:27:17,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 109. [2022-03-01 17:27:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.5185185185185186) internal successors, (272), 108 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:17,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 272 transitions. [2022-03-01 17:27:17,336 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 272 transitions. Word has length 14 [2022-03-01 17:27:17,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:17,336 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 272 transitions. [2022-03-01 17:27:17,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:17,337 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 272 transitions. [2022-03-01 17:27:17,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:17,337 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:17,337 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:17,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:17,543 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:17,543 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:17,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:17,544 INFO L85 PathProgramCache]: Analyzing trace with hash 12358243, now seen corresponding path program 51 times [2022-03-01 17:27:17,544 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:17,544 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096800943] [2022-03-01 17:27:17,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:17,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:17,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:17,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:17,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096800943] [2022-03-01 17:27:17,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096800943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:17,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689825674] [2022-03-01 17:27:17,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:27:17,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:17,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:17,889 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:17,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-03-01 17:27:17,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:27:17,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:17,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:17,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:18,309 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:18,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:18,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:18,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:18,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:18,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:18,369 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:19,046 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:19,046 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:27:19,050 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:19,065 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:19,065 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:27:19,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:19,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689825674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:19,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:19,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:19,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891730674] [2022-03-01 17:27:19,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:19,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:19,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:19,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:19,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:19,350 INFO L87 Difference]: Start difference. First operand 109 states and 272 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:20,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:20,127 INFO L93 Difference]: Finished difference Result 147 states and 341 transitions. [2022-03-01 17:27:20,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:27:20,127 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:20,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:20,127 INFO L225 Difference]: With dead ends: 147 [2022-03-01 17:27:20,128 INFO L226 Difference]: Without dead ends: 141 [2022-03-01 17:27:20,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:27:20,128 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 326 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:20,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 22 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 326 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-03-01 17:27:20,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-01 17:27:20,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 111. [2022-03-01 17:27:20,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.5272727272727273) internal successors, (278), 110 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 278 transitions. [2022-03-01 17:27:20,133 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 278 transitions. Word has length 14 [2022-03-01 17:27:20,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:20,133 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 278 transitions. [2022-03-01 17:27:20,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:20,133 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 278 transitions. [2022-03-01 17:27:20,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:20,134 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:20,134 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:20,152 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-03-01 17:27:20,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:20,339 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:20,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:20,340 INFO L85 PathProgramCache]: Analyzing trace with hash 183060673, now seen corresponding path program 52 times [2022-03-01 17:27:20,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:20,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835036732] [2022-03-01 17:27:20,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:20,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:20,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:20,728 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:20,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835036732] [2022-03-01 17:27:20,728 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835036732] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:20,728 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358003418] [2022-03-01 17:27:20,728 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:27:20,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:20,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:20,729 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:20,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-03-01 17:27:20,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:27:20,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:20,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:20,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:21,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:21,181 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:21,181 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:21,183 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:21,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:21,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:21,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:21,927 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:21,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:27:21,931 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:21,944 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:21,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:27:22,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:22,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358003418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:22,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:22,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:22,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21673312] [2022-03-01 17:27:22,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:22,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:22,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:22,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:22,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:22,296 INFO L87 Difference]: Start difference. First operand 111 states and 278 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:23,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:23,129 INFO L93 Difference]: Finished difference Result 145 states and 335 transitions. [2022-03-01 17:27:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:27:23,130 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:23,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:23,130 INFO L225 Difference]: With dead ends: 145 [2022-03-01 17:27:23,130 INFO L226 Difference]: Without dead ends: 141 [2022-03-01 17:27:23,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:27:23,131 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:23,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 19 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 303 Invalid, 0 Unknown, 35 Unchecked, 0.2s Time] [2022-03-01 17:27:23,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-01 17:27:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 111. [2022-03-01 17:27:23,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.5272727272727273) internal successors, (278), 110 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:23,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 278 transitions. [2022-03-01 17:27:23,134 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 278 transitions. Word has length 14 [2022-03-01 17:27:23,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:23,134 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 278 transitions. [2022-03-01 17:27:23,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:23,134 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 278 transitions. [2022-03-01 17:27:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:23,135 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:23,135 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:23,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-03-01 17:27:23,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:23,343 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:23,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:23,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1210399357, now seen corresponding path program 53 times [2022-03-01 17:27:23,344 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:23,344 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684534389] [2022-03-01 17:27:23,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:23,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:23,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:23,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:23,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684534389] [2022-03-01 17:27:23,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684534389] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:23,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084537901] [2022-03-01 17:27:23,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:27:23,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:23,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:23,525 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:23,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-03-01 17:27:23,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:27:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:23,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:23,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:23,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:23,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:23,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:23,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:23,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:23,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:23,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:23,905 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:24,488 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:24,489 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:27:24,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:24,506 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:24,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:27:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:24,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084537901] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:24,703 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:24,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-01 17:27:24,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347338312] [2022-03-01 17:27:24,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:24,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:27:24,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:24,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:27:24,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:27:24,704 INFO L87 Difference]: Start difference. First operand 111 states and 278 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:25,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:25,031 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2022-03-01 17:27:25,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:27:25,031 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:25,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:25,032 INFO L225 Difference]: With dead ends: 157 [2022-03-01 17:27:25,032 INFO L226 Difference]: Without dead ends: 151 [2022-03-01 17:27:25,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:27:25,032 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 21 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 325 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 141 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:25,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 325 Invalid, 0 Unknown, 141 Unchecked, 0.2s Time] [2022-03-01 17:27:25,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-01 17:27:25,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 119. [2022-03-01 17:27:25,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.5338983050847457) internal successors, (299), 118 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2022-03-01 17:27:25,035 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 14 [2022-03-01 17:27:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:25,035 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2022-03-01 17:27:25,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:25,035 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2022-03-01 17:27:25,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:25,036 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:25,036 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:25,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:25,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2022-03-01 17:27:25,259 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:25,259 INFO L85 PathProgramCache]: Analyzing trace with hash -1477046753, now seen corresponding path program 54 times [2022-03-01 17:27:25,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:25,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761525883] [2022-03-01 17:27:25,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:25,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:25,583 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:25,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761525883] [2022-03-01 17:27:25,583 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761525883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:25,583 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016081009] [2022-03-01 17:27:25,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:27:25,583 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:25,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:25,588 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:25,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-03-01 17:27:25,621 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:27:25,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:25,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:25,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:26,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:26,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:26,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:26,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:26,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:26,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:26,051 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:26,833 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:26,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 248 treesize of output 228 [2022-03-01 17:27:26,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:26,851 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:26,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 212 treesize of output 206 [2022-03-01 17:27:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:27,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016081009] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:27,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:27,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:27:27,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561802311] [2022-03-01 17:27:27,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:27,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:27:27,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:27,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:27:27,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:27:27,100 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:27,478 INFO L93 Difference]: Finished difference Result 160 states and 372 transitions. [2022-03-01 17:27:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:27:27,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:27,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:27,479 INFO L225 Difference]: With dead ends: 160 [2022-03-01 17:27:27,479 INFO L226 Difference]: Without dead ends: 154 [2022-03-01 17:27:27,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:27:27,480 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:27,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 26 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 337 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-03-01 17:27:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-03-01 17:27:27,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2022-03-01 17:27:27,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 2.5338983050847457) internal successors, (299), 118 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 299 transitions. [2022-03-01 17:27:27,482 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 299 transitions. Word has length 14 [2022-03-01 17:27:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:27,482 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 299 transitions. [2022-03-01 17:27:27,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 299 transitions. [2022-03-01 17:27:27,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:27,482 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:27,482 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:27,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-03-01 17:27:27,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2022-03-01 17:27:27,683 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:27,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash 422703011, now seen corresponding path program 55 times [2022-03-01 17:27:27,683 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:27,683 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808696420] [2022-03-01 17:27:27,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:27,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:27,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:27,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:27,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:27,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808696420] [2022-03-01 17:27:27,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808696420] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:27,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197693163] [2022-03-01 17:27:27,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:27:27,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:27,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:27,980 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:27,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-03-01 17:27:28,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:28,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:28,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:28,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:28,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:28,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:28,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:28,413 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:28,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:28,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:28,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:29,062 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:29,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:27:29,066 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:29,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:29,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:27:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:29,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197693163] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:29,367 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:29,367 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:29,367 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616292750] [2022-03-01 17:27:29,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:29,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:29,368 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:29,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:29,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:29,368 INFO L87 Difference]: Start difference. First operand 119 states and 299 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:29,647 INFO L93 Difference]: Finished difference Result 149 states and 351 transitions. [2022-03-01 17:27:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-03-01 17:27:29,647 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:29,648 INFO L225 Difference]: With dead ends: 149 [2022-03-01 17:27:29,648 INFO L226 Difference]: Without dead ends: 147 [2022-03-01 17:27:29,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:27:29,648 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:29,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 20 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 250 Invalid, 0 Unknown, 100 Unchecked, 0.1s Time] [2022-03-01 17:27:29,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-01 17:27:29,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2022-03-01 17:27:29,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.5384615384615383) internal successors, (297), 117 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 297 transitions. [2022-03-01 17:27:29,651 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 297 transitions. Word has length 14 [2022-03-01 17:27:29,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:29,651 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 297 transitions. [2022-03-01 17:27:29,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:29,651 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 297 transitions. [2022-03-01 17:27:29,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:29,651 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:29,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:29,667 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-03-01 17:27:29,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-03-01 17:27:29,852 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:29,852 INFO L85 PathProgramCache]: Analyzing trace with hash -221091617, now seen corresponding path program 56 times [2022-03-01 17:27:29,852 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:29,852 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686535623] [2022-03-01 17:27:29,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:29,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:29,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:30,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:30,110 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:30,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686535623] [2022-03-01 17:27:30,110 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686535623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:30,110 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573038369] [2022-03-01 17:27:30,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:27:30,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:30,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:30,112 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:30,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-03-01 17:27:30,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:27:30,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:30,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:30,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:30,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:30,408 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:30,413 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2022-03-01 17:27:30,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:30,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:27:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:30,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:30,903 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-03-01 17:27:30,903 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 207 [2022-03-01 17:27:30,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:30,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:30,921 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:30,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 175 [2022-03-01 17:27:31,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:31,230 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573038369] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:31,231 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:31,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:31,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905985721] [2022-03-01 17:27:31,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:31,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:31,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:31,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:31,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:31,231 INFO L87 Difference]: Start difference. First operand 118 states and 297 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:31,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:31,833 INFO L93 Difference]: Finished difference Result 185 states and 415 transitions. [2022-03-01 17:27:31,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:27:31,833 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:31,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:31,834 INFO L225 Difference]: With dead ends: 185 [2022-03-01 17:27:31,834 INFO L226 Difference]: Without dead ends: 176 [2022-03-01 17:27:31,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:27:31,834 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 40 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:31,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 49 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:27:31,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-01 17:27:31,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 125. [2022-03-01 17:27:31,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 2.532258064516129) internal successors, (314), 124 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:31,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 314 transitions. [2022-03-01 17:27:31,837 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 314 transitions. Word has length 14 [2022-03-01 17:27:31,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:31,837 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 314 transitions. [2022-03-01 17:27:31,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 314 transitions. [2022-03-01 17:27:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:31,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:31,838 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:31,856 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-03-01 17:27:32,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:32,048 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:32,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:32,048 INFO L85 PathProgramCache]: Analyzing trace with hash 26281119, now seen corresponding path program 57 times [2022-03-01 17:27:32,048 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:32,048 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195614693] [2022-03-01 17:27:32,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:32,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:32,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:32,444 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:32,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195614693] [2022-03-01 17:27:32,444 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195614693] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:32,444 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161439517] [2022-03-01 17:27:32,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:27:32,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:32,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:32,446 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:32,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-03-01 17:27:32,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:27:32,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:32,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:32,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:32,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:32,812 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:27:32,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-03-01 17:27:32,820 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:27:32,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-01 17:27:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:32,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:33,408 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-03-01 17:27:33,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 264 treesize of output 228 [2022-03-01 17:27:33,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:33,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:33,428 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:33,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 212 treesize of output 196 [2022-03-01 17:27:33,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:33,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161439517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:33,762 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:33,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:27:33,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939021190] [2022-03-01 17:27:33,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:33,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:33,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:33,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:33,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:33,763 INFO L87 Difference]: Start difference. First operand 125 states and 314 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:34,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:34,667 INFO L93 Difference]: Finished difference Result 191 states and 441 transitions. [2022-03-01 17:27:34,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:27:34,667 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:34,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:34,668 INFO L225 Difference]: With dead ends: 191 [2022-03-01 17:27:34,668 INFO L226 Difference]: Without dead ends: 182 [2022-03-01 17:27:34,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:27:34,668 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 62 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:34,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 28 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 375 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-03-01 17:27:34,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-01 17:27:34,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 134. [2022-03-01 17:27:34,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.6240601503759398) internal successors, (349), 133 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:34,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 349 transitions. [2022-03-01 17:27:34,671 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 349 transitions. Word has length 14 [2022-03-01 17:27:34,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:34,671 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 349 transitions. [2022-03-01 17:27:34,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:34,671 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 349 transitions. [2022-03-01 17:27:34,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:34,672 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:34,672 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:34,688 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-03-01 17:27:34,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:34,875 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:34,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:34,876 INFO L85 PathProgramCache]: Analyzing trace with hash -390038497, now seen corresponding path program 58 times [2022-03-01 17:27:34,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:34,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918539927] [2022-03-01 17:27:34,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:34,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:35,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:35,155 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:35,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918539927] [2022-03-01 17:27:35,155 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918539927] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:35,155 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930203370] [2022-03-01 17:27:35,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:27:35,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:35,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:35,160 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:35,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-03-01 17:27:35,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:27:35,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:35,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:35,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:35,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:35,528 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:27:35,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-03-01 17:27:35,534 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:27:35,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-01 17:27:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:35,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:36,114 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-03-01 17:27:36,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 265 treesize of output 229 [2022-03-01 17:27:36,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:36,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:36,133 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:36,133 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 213 treesize of output 197 [2022-03-01 17:27:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:36,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930203370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:36,427 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:36,427 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:27:36,427 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636866008] [2022-03-01 17:27:36,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:36,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:27:36,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:36,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:27:36,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:27:36,428 INFO L87 Difference]: Start difference. First operand 134 states and 349 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:36,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:36,970 INFO L93 Difference]: Finished difference Result 175 states and 426 transitions. [2022-03-01 17:27:36,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:27:36,970 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:36,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:36,971 INFO L225 Difference]: With dead ends: 175 [2022-03-01 17:27:36,971 INFO L226 Difference]: Without dead ends: 169 [2022-03-01 17:27:36,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:27:36,971 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 22 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 365 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:36,971 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 25 Invalid, 365 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 343 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2022-03-01 17:27:36,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2022-03-01 17:27:36,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 136. [2022-03-01 17:27:36,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 2.6296296296296298) internal successors, (355), 135 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:36,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 355 transitions. [2022-03-01 17:27:36,975 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 355 transitions. Word has length 14 [2022-03-01 17:27:36,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:36,975 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 355 transitions. [2022-03-01 17:27:36,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:36,975 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 355 transitions. [2022-03-01 17:27:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:36,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:36,975 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:36,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:37,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:37,196 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:37,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:37,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1348437273, now seen corresponding path program 59 times [2022-03-01 17:27:37,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:37,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275682105] [2022-03-01 17:27:37,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:37,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:37,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:37,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:37,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:37,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275682105] [2022-03-01 17:27:37,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275682105] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:37,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114011517] [2022-03-01 17:27:37,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:27:37,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:37,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:37,387 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:37,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-03-01 17:27:37,411 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:27:37,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:37,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:37,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:37,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:37,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:37,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:37,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:37,719 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:37,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:37,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:38,242 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-03-01 17:27:38,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 244 treesize of output 208 [2022-03-01 17:27:38,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:38,247 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:38,261 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:38,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 192 treesize of output 176 [2022-03-01 17:27:38,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:38,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114011517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:38,577 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:38,577 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:38,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893872385] [2022-03-01 17:27:38,577 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:38,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:38,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:38,577 INFO L87 Difference]: Start difference. First operand 136 states and 355 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:38,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:38,848 INFO L93 Difference]: Finished difference Result 209 states and 483 transitions. [2022-03-01 17:27:38,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:27:38,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:38,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:38,850 INFO L225 Difference]: With dead ends: 209 [2022-03-01 17:27:38,850 INFO L226 Difference]: Without dead ends: 203 [2022-03-01 17:27:38,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:27:38,850 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:38,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 54 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 397 Invalid, 0 Unknown, 145 Unchecked, 0.2s Time] [2022-03-01 17:27:38,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-03-01 17:27:38,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 144. [2022-03-01 17:27:38,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.6503496503496504) internal successors, (379), 143 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:38,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 379 transitions. [2022-03-01 17:27:38,855 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 379 transitions. Word has length 14 [2022-03-01 17:27:38,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:38,855 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 379 transitions. [2022-03-01 17:27:38,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:38,855 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 379 transitions. [2022-03-01 17:27:38,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:38,856 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:38,856 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:38,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-03-01 17:27:39,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:39,057 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:39,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:39,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2097435551, now seen corresponding path program 60 times [2022-03-01 17:27:39,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:39,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260093263] [2022-03-01 17:27:39,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:39,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:39,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:39,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:39,131 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:39,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260093263] [2022-03-01 17:27:39,131 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260093263] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:39,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504527752] [2022-03-01 17:27:39,132 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:27:39,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:39,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:39,133 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:39,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-03-01 17:27:39,165 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:27:39,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:39,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 15 conjunts are in the unsatisfiable core [2022-03-01 17:27:39,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:39,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:39,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:27:39,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:39,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:27:39,325 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:39,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:39,451 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:27:39,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 25 [2022-03-01 17:27:39,453 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:27:39,462 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:39,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504527752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:39,463 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:39,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-03-01 17:27:39,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020975544] [2022-03-01 17:27:39,463 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:39,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:27:39,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:39,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:27:39,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:27:39,464 INFO L87 Difference]: Start difference. First operand 144 states and 379 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:39,646 INFO L93 Difference]: Finished difference Result 181 states and 447 transitions. [2022-03-01 17:27:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:27:39,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:39,646 INFO L225 Difference]: With dead ends: 181 [2022-03-01 17:27:39,647 INFO L226 Difference]: Without dead ends: 181 [2022-03-01 17:27:39,647 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:27:39,647 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:39,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 20 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 250 Invalid, 0 Unknown, 42 Unchecked, 0.1s Time] [2022-03-01 17:27:39,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-03-01 17:27:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 140. [2022-03-01 17:27:39,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 2.6546762589928057) internal successors, (369), 139 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 369 transitions. [2022-03-01 17:27:39,650 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 369 transitions. Word has length 14 [2022-03-01 17:27:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:39,650 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 369 transitions. [2022-03-01 17:27:39,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:39,650 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 369 transitions. [2022-03-01 17:27:39,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:39,650 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:39,651 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:39,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:39,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:39,868 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:39,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:39,869 INFO L85 PathProgramCache]: Analyzing trace with hash 732600931, now seen corresponding path program 61 times [2022-03-01 17:27:39,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:39,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054725174] [2022-03-01 17:27:39,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:39,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:39,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:40,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:40,264 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:40,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054725174] [2022-03-01 17:27:40,264 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054725174] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:40,264 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457093955] [2022-03-01 17:27:40,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:27:40,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:40,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:40,265 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:40,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-03-01 17:27:40,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:40,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:40,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:40,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:40,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:40,628 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:40,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:40,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:40,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:40,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:40,675 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:41,221 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:41,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 187 [2022-03-01 17:27:41,225 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:41,239 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:41,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 165 [2022-03-01 17:27:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:41,638 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457093955] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:41,638 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:41,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:41,638 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606692367] [2022-03-01 17:27:41,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:41,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:41,638 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:41,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:41,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:41,639 INFO L87 Difference]: Start difference. First operand 140 states and 369 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:42,369 INFO L93 Difference]: Finished difference Result 185 states and 461 transitions. [2022-03-01 17:27:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:27:42,370 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:42,370 INFO L225 Difference]: With dead ends: 185 [2022-03-01 17:27:42,370 INFO L226 Difference]: Without dead ends: 182 [2022-03-01 17:27:42,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:27:42,371 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:42,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 17 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 339 Invalid, 0 Unknown, 100 Unchecked, 0.2s Time] [2022-03-01 17:27:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-03-01 17:27:42,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 142. [2022-03-01 17:27:42,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.645390070921986) internal successors, (373), 141 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 373 transitions. [2022-03-01 17:27:42,374 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 373 transitions. Word has length 14 [2022-03-01 17:27:42,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:42,374 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 373 transitions. [2022-03-01 17:27:42,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 373 transitions. [2022-03-01 17:27:42,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:42,374 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:42,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:42,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:42,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-03-01 17:27:42,575 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:42,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:42,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1304055737, now seen corresponding path program 62 times [2022-03-01 17:27:42,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:42,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029813556] [2022-03-01 17:27:42,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:42,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:42,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:42,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029813556] [2022-03-01 17:27:42,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029813556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:42,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097923126] [2022-03-01 17:27:42,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:27:42,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:42,815 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:42,815 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:42,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-03-01 17:27:42,838 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:27:42,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:42,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:42,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:43,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:43,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:43,182 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:43,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:43,184 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:43,184 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:43,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:43,752 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:43,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 187 [2022-03-01 17:27:43,756 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:43,770 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:43,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 165 [2022-03-01 17:27:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:44,040 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097923126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:44,040 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:44,040 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:27:44,040 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695477850] [2022-03-01 17:27:44,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:44,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:27:44,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:44,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:27:44,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:27:44,041 INFO L87 Difference]: Start difference. First operand 142 states and 373 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:44,471 INFO L93 Difference]: Finished difference Result 178 states and 453 transitions. [2022-03-01 17:27:44,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:27:44,472 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:44,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:44,472 INFO L225 Difference]: With dead ends: 178 [2022-03-01 17:27:44,472 INFO L226 Difference]: Without dead ends: 175 [2022-03-01 17:27:44,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:27:44,473 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:44,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 11 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 220 Invalid, 0 Unknown, 50 Unchecked, 0.1s Time] [2022-03-01 17:27:44,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-03-01 17:27:44,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 143. [2022-03-01 17:27:44,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.647887323943662) internal successors, (376), 142 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:44,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 376 transitions. [2022-03-01 17:27:44,476 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 376 transitions. Word has length 14 [2022-03-01 17:27:44,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:44,476 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 376 transitions. [2022-03-01 17:27:44,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:44,476 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 376 transitions. [2022-03-01 17:27:44,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:44,477 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:44,477 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:44,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:44,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2022-03-01 17:27:44,692 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1261864225, now seen corresponding path program 63 times [2022-03-01 17:27:44,693 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:44,693 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684912382] [2022-03-01 17:27:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:44,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:44,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:44,922 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:44,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:44,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684912382] [2022-03-01 17:27:44,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684912382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:44,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082505388] [2022-03-01 17:27:44,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:27:44,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:44,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:44,923 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:44,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-03-01 17:27:44,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:27:44,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:44,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:44,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:45,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:45,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:45,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:45,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:45,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:45,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:45,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:45,852 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:45,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 187 [2022-03-01 17:27:45,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:45,885 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:45,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 165 [2022-03-01 17:27:46,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:46,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082505388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:46,096 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:46,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:46,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658808695] [2022-03-01 17:27:46,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:46,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:46,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:46,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:46,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:46,097 INFO L87 Difference]: Start difference. First operand 143 states and 376 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:46,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:46,412 INFO L93 Difference]: Finished difference Result 180 states and 458 transitions. [2022-03-01 17:27:46,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:27:46,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:46,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:46,413 INFO L225 Difference]: With dead ends: 180 [2022-03-01 17:27:46,413 INFO L226 Difference]: Without dead ends: 177 [2022-03-01 17:27:46,413 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:27:46,414 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:46,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 14 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 241 Invalid, 0 Unknown, 99 Unchecked, 0.1s Time] [2022-03-01 17:27:46,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-03-01 17:27:46,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 144. [2022-03-01 17:27:46,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 2.6503496503496504) internal successors, (379), 143 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 379 transitions. [2022-03-01 17:27:46,416 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 379 transitions. Word has length 14 [2022-03-01 17:27:46,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:46,416 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 379 transitions. [2022-03-01 17:27:46,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:46,417 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 379 transitions. [2022-03-01 17:27:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:46,417 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:46,417 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:46,441 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:46,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2022-03-01 17:27:46,641 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:46,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:46,641 INFO L85 PathProgramCache]: Analyzing trace with hash 456479481, now seen corresponding path program 64 times [2022-03-01 17:27:46,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:46,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341656477] [2022-03-01 17:27:46,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:46,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:46,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:46,812 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:46,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341656477] [2022-03-01 17:27:46,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341656477] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:46,812 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646185183] [2022-03-01 17:27:46,812 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:27:46,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:46,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:46,813 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:46,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-03-01 17:27:46,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:27:46,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:46,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:46,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:47,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:47,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:47,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:47,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:47,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:47,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:47,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:47,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:47,770 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:47,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 187 [2022-03-01 17:27:47,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:47,788 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:47,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 165 [2022-03-01 17:27:48,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:48,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646185183] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:48,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:48,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2022-03-01 17:27:48,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775030046] [2022-03-01 17:27:48,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:48,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:27:48,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:48,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:27:48,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:27:48,120 INFO L87 Difference]: Start difference. First operand 144 states and 379 transitions. Second operand has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:48,320 INFO L93 Difference]: Finished difference Result 179 states and 457 transitions. [2022-03-01 17:27:48,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:27:48,320 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:48,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:48,321 INFO L225 Difference]: With dead ends: 179 [2022-03-01 17:27:48,321 INFO L226 Difference]: Without dead ends: 176 [2022-03-01 17:27:48,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:27:48,321 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:48,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 16 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 65 Unchecked, 0.1s Time] [2022-03-01 17:27:48,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-03-01 17:27:48,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 142. [2022-03-01 17:27:48,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.645390070921986) internal successors, (373), 141 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 373 transitions. [2022-03-01 17:27:48,324 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 373 transitions. Word has length 14 [2022-03-01 17:27:48,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:48,324 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 373 transitions. [2022-03-01 17:27:48,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:48,324 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 373 transitions. [2022-03-01 17:27:48,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:48,325 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:48,325 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:48,351 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:48,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2022-03-01 17:27:48,547 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:48,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:48,547 INFO L85 PathProgramCache]: Analyzing trace with hash -844740799, now seen corresponding path program 65 times [2022-03-01 17:27:48,547 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:48,547 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941723021] [2022-03-01 17:27:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:48,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:48,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:48,894 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:48,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941723021] [2022-03-01 17:27:48,894 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941723021] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:48,894 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982487104] [2022-03-01 17:27:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:27:48,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:48,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:48,895 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:48,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-03-01 17:27:48,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:27:48,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:48,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:48,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:49,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:49,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:49,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:49,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:49,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:49,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:49,339 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:49,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:49,966 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:49,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 223 treesize of output 203 [2022-03-01 17:27:49,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:49,984 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:49,984 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 187 treesize of output 181 [2022-03-01 17:27:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:50,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982487104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:50,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:50,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:27:50,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902680145] [2022-03-01 17:27:50,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:50,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:50,284 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:50,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:50,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:50,284 INFO L87 Difference]: Start difference. First operand 142 states and 373 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:50,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:50,821 INFO L93 Difference]: Finished difference Result 167 states and 420 transitions. [2022-03-01 17:27:50,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:27:50,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:50,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:50,822 INFO L225 Difference]: With dead ends: 167 [2022-03-01 17:27:50,822 INFO L226 Difference]: Without dead ends: 164 [2022-03-01 17:27:50,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:27:50,823 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:50,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 18 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 152 Unchecked, 0.2s Time] [2022-03-01 17:27:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-03-01 17:27:50,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 142. [2022-03-01 17:27:50,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.645390070921986) internal successors, (373), 141 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:50,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 373 transitions. [2022-03-01 17:27:50,825 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 373 transitions. Word has length 14 [2022-03-01 17:27:50,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:50,826 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 373 transitions. [2022-03-01 17:27:50,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 20 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:50,826 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 373 transitions. [2022-03-01 17:27:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:50,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:50,826 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:50,845 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-03-01 17:27:51,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:51,035 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:51,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:51,036 INFO L85 PathProgramCache]: Analyzing trace with hash -605098461, now seen corresponding path program 66 times [2022-03-01 17:27:51,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:51,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227661698] [2022-03-01 17:27:51,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:51,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:51,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:51,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:51,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:51,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227661698] [2022-03-01 17:27:51,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227661698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:51,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280912616] [2022-03-01 17:27:51,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:27:51,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:51,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:51,413 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:51,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-03-01 17:27:51,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:27:51,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:51,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:51,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:51,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:51,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:51,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:51,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:51,841 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:51,841 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:51,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:51,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:52,528 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:52,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 207 treesize of output 187 [2022-03-01 17:27:52,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:52,545 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:52,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 171 treesize of output 165 [2022-03-01 17:27:52,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:52,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280912616] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:52,880 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:52,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:27:52,880 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004517983] [2022-03-01 17:27:52,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:52,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:27:52,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:27:52,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:27:52,880 INFO L87 Difference]: Start difference. First operand 142 states and 373 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:53,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:53,349 INFO L93 Difference]: Finished difference Result 180 states and 437 transitions. [2022-03-01 17:27:53,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:27:53,349 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:53,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:53,350 INFO L225 Difference]: With dead ends: 180 [2022-03-01 17:27:53,350 INFO L226 Difference]: Without dead ends: 171 [2022-03-01 17:27:53,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=112, Invalid=488, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:27:53,350 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 27 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:53,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 417 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-03-01 17:27:53,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-03-01 17:27:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 142. [2022-03-01 17:27:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.645390070921986) internal successors, (373), 141 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 373 transitions. [2022-03-01 17:27:53,352 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 373 transitions. Word has length 14 [2022-03-01 17:27:53,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:53,352 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 373 transitions. [2022-03-01 17:27:53,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:53,352 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 373 transitions. [2022-03-01 17:27:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:53,353 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:53,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:53,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:53,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:53,553 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:53,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:53,554 INFO L85 PathProgramCache]: Analyzing trace with hash -597368063, now seen corresponding path program 67 times [2022-03-01 17:27:53,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:53,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103721762] [2022-03-01 17:27:53,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:53,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:53,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:53,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:53,711 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:53,711 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103721762] [2022-03-01 17:27:53,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103721762] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:53,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53035003] [2022-03-01 17:27:53,712 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:27:53,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:53,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:53,713 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:53,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-03-01 17:27:53,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:53,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:54,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:54,053 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:54,054 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 65 [2022-03-01 17:27:54,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:54,056 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:27:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:54,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:54,725 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:27:54,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 216 treesize of output 192 [2022-03-01 17:27:54,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:54,742 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:54,742 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 176 treesize of output 166 [2022-03-01 17:27:55,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:55,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53035003] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:55,020 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:55,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-03-01 17:27:55,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696548653] [2022-03-01 17:27:55,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:55,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:27:55,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:27:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:27:55,021 INFO L87 Difference]: Start difference. First operand 142 states and 373 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:55,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:55,872 INFO L93 Difference]: Finished difference Result 210 states and 492 transitions. [2022-03-01 17:27:55,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:27:55,872 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:55,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:55,873 INFO L225 Difference]: With dead ends: 210 [2022-03-01 17:27:55,873 INFO L226 Difference]: Without dead ends: 207 [2022-03-01 17:27:55,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:27:55,874 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 41 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 545 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:55,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 47 Invalid, 545 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:27:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-03-01 17:27:55,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2022-03-01 17:27:55,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 2.6666666666666665) internal successors, (384), 144 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:55,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 384 transitions. [2022-03-01 17:27:55,876 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 384 transitions. Word has length 14 [2022-03-01 17:27:55,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:55,876 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 384 transitions. [2022-03-01 17:27:55,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:55,877 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 384 transitions. [2022-03-01 17:27:55,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:55,877 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:55,877 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:55,900 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2022-03-01 17:27:56,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:56,091 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:56,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:56,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1262043321, now seen corresponding path program 68 times [2022-03-01 17:27:56,092 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:56,092 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756087443] [2022-03-01 17:27:56,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:56,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:56,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:56,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:56,353 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:56,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756087443] [2022-03-01 17:27:56,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756087443] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:56,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814735177] [2022-03-01 17:27:56,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:27:56,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:56,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:56,355 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:56,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-03-01 17:27:56,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:27:56,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:56,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:56,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:56,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:56,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:56,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:56,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:56,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:56,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:56,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:56,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:57,246 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-03-01 17:27:57,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 207 [2022-03-01 17:27:57,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:57,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:57,265 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:57,265 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 175 [2022-03-01 17:27:57,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:57,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814735177] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:57,592 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:57,592 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:57,592 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052511378] [2022-03-01 17:27:57,592 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:57,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:57,592 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:57,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:57,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:57,593 INFO L87 Difference]: Start difference. First operand 145 states and 384 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:57,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:27:57,958 INFO L93 Difference]: Finished difference Result 207 states and 498 transitions. [2022-03-01 17:27:57,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:27:57,958 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:27:57,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:27:57,959 INFO L225 Difference]: With dead ends: 207 [2022-03-01 17:27:57,959 INFO L226 Difference]: Without dead ends: 198 [2022-03-01 17:27:57,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:27:57,960 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:27:57,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 34 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 309 Invalid, 0 Unknown, 42 Unchecked, 0.2s Time] [2022-03-01 17:27:57,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-03-01 17:27:57,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 150. [2022-03-01 17:27:57,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 2.684563758389262) internal successors, (400), 149 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:57,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 400 transitions. [2022-03-01 17:27:57,963 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 400 transitions. Word has length 14 [2022-03-01 17:27:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:27:57,963 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 400 transitions. [2022-03-01 17:27:57,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:27:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 400 transitions. [2022-03-01 17:27:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:27:57,964 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:27:57,964 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:27:57,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-03-01 17:27:58,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-03-01 17:27:58,179 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:27:58,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:27:58,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1303876641, now seen corresponding path program 69 times [2022-03-01 17:27:58,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:27:58,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027224672] [2022-03-01 17:27:58,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:27:58,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:27:58,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:27:58,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:58,485 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:27:58,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027224672] [2022-03-01 17:27:58,485 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027224672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:27:58,485 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452230190] [2022-03-01 17:27:58,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:27:58,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:27:58,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:27:58,487 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:27:58,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-03-01 17:27:58,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:27:58,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:27:58,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:27:58,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:27:58,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:58,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:27:58,890 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:58,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:27:58,896 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:58,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:27:58,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:58,942 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:27:59,389 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-03-01 17:27:59,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 207 [2022-03-01 17:27:59,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:59,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:27:59,407 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:27:59,407 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 175 [2022-03-01 17:27:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:27:59,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452230190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:27:59,719 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:27:59,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:27:59,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59956791] [2022-03-01 17:27:59,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:27:59,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:27:59,720 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:27:59,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:27:59,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:27:59,720 INFO L87 Difference]: Start difference. First operand 150 states and 400 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:00,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:00,156 INFO L93 Difference]: Finished difference Result 189 states and 471 transitions. [2022-03-01 17:28:00,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:28:00,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:28:00,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:00,157 INFO L225 Difference]: With dead ends: 189 [2022-03-01 17:28:00,157 INFO L226 Difference]: Without dead ends: 183 [2022-03-01 17:28:00,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:28:00,157 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 14 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:00,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 28 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 295 Invalid, 0 Unknown, 108 Unchecked, 0.2s Time] [2022-03-01 17:28:00,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-03-01 17:28:00,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 152. [2022-03-01 17:28:00,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.6887417218543046) internal successors, (406), 151 states have internal predecessors, (406), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:00,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 406 transitions. [2022-03-01 17:28:00,160 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 406 transitions. Word has length 14 [2022-03-01 17:28:00,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:00,160 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 406 transitions. [2022-03-01 17:28:00,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:00,160 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 406 transitions. [2022-03-01 17:28:00,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:28:00,160 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:00,160 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:00,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:00,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:00,369 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:00,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:00,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1720196257, now seen corresponding path program 70 times [2022-03-01 17:28:00,369 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:00,369 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303629862] [2022-03-01 17:28:00,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:00,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:00,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:00,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:00,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:00,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303629862] [2022-03-01 17:28:00,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303629862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:00,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62922857] [2022-03-01 17:28:00,618 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:00,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:00,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:00,620 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:00,638 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-03-01 17:28:00,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:00,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:00,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:28:00,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:01,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:01,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:01,011 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:01,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:28:01,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:01,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:28:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:01,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:01,607 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-03-01 17:28:01,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 243 treesize of output 207 [2022-03-01 17:28:01,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:01,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:01,630 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:01,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 191 treesize of output 175 [2022-03-01 17:28:01,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:01,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62922857] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:01,963 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:01,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:28:01,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441191501] [2022-03-01 17:28:01,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:01,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:28:01,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:01,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:28:01,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:28:01,964 INFO L87 Difference]: Start difference. First operand 152 states and 406 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:02,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:02,562 INFO L93 Difference]: Finished difference Result 221 states and 534 transitions. [2022-03-01 17:28:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:28:02,563 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:28:02,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:02,563 INFO L225 Difference]: With dead ends: 221 [2022-03-01 17:28:02,563 INFO L226 Difference]: Without dead ends: 209 [2022-03-01 17:28:02,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:28:02,564 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 31 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:02,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 26 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 505 Invalid, 0 Unknown, 76 Unchecked, 0.3s Time] [2022-03-01 17:28:02,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-03-01 17:28:02,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 158. [2022-03-01 17:28:02,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.732484076433121) internal successors, (429), 157 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:02,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 429 transitions. [2022-03-01 17:28:02,567 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 429 transitions. Word has length 14 [2022-03-01 17:28:02,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:02,567 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 429 transitions. [2022-03-01 17:28:02,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:02,567 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 429 transitions. [2022-03-01 17:28:02,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:28:02,568 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:02,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:02,591 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:02,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:02,790 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:02,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:02,791 INFO L85 PathProgramCache]: Analyzing trace with hash 1093096441, now seen corresponding path program 71 times [2022-03-01 17:28:02,791 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:02,791 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207681076] [2022-03-01 17:28:02,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:02,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:03,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:03,077 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:03,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207681076] [2022-03-01 17:28:03,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207681076] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:03,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404338608] [2022-03-01 17:28:03,077 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:03,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:03,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:03,080 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:03,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-03-01 17:28:03,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:28:03,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:03,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:28:03,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:03,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:03,371 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:28:03,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 81 treesize of output 70 [2022-03-01 17:28:03,376 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:28:03,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-01 17:28:03,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:03,426 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:03,870 INFO L353 Elim1Store]: treesize reduction 44, result has 39.7 percent of original size [2022-03-01 17:28:03,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 265 treesize of output 229 [2022-03-01 17:28:03,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:03,875 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:03,889 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:03,889 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 213 treesize of output 197 [2022-03-01 17:28:04,197 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:04,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404338608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:04,197 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:04,197 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 19 [2022-03-01 17:28:04,197 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231259609] [2022-03-01 17:28:04,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:04,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:28:04,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:04,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:28:04,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:28:04,198 INFO L87 Difference]: Start difference. First operand 158 states and 429 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:04,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:04,818 INFO L93 Difference]: Finished difference Result 224 states and 548 transitions. [2022-03-01 17:28:04,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:28:04,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:28:04,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:04,819 INFO L225 Difference]: With dead ends: 224 [2022-03-01 17:28:04,819 INFO L226 Difference]: Without dead ends: 218 [2022-03-01 17:28:04,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:04,820 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:04,820 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 38 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:28:04,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-03-01 17:28:04,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 162. [2022-03-01 17:28:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.751552795031056) internal successors, (443), 161 states have internal predecessors, (443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:04,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 443 transitions. [2022-03-01 17:28:04,823 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 443 transitions. Word has length 14 [2022-03-01 17:28:04,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:04,823 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 443 transitions. [2022-03-01 17:28:04,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:04,823 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 443 transitions. [2022-03-01 17:28:04,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:28:04,824 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:04,824 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:04,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:05,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2022-03-01 17:28:05,046 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:05,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:05,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1325147407, now seen corresponding path program 72 times [2022-03-01 17:28:05,047 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:05,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865057222] [2022-03-01 17:28:05,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:05,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:05,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:05,356 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:05,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865057222] [2022-03-01 17:28:05,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865057222] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:05,356 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223069388] [2022-03-01 17:28:05,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:05,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:05,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:05,360 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:05,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-03-01 17:28:05,394 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:28:05,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:05,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:28:05,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:05,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:05,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:05,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:05,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:28:05,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:05,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:28:05,860 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:05,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:06,419 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:28:06,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:28:06,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:06,436 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:06,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:28:06,712 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:06,712 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223069388] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:06,712 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:06,712 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:28:06,712 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365039048] [2022-03-01 17:28:06,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:06,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:28:06,713 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:06,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:28:06,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:28:06,713 INFO L87 Difference]: Start difference. First operand 162 states and 443 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:06,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:06,964 INFO L93 Difference]: Finished difference Result 209 states and 551 transitions. [2022-03-01 17:28:06,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-03-01 17:28:06,964 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:28:06,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:06,965 INFO L225 Difference]: With dead ends: 209 [2022-03-01 17:28:06,965 INFO L226 Difference]: Without dead ends: 206 [2022-03-01 17:28:06,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:28:06,965 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 8 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 35 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:06,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 13 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 222 Invalid, 0 Unknown, 35 Unchecked, 0.1s Time] [2022-03-01 17:28:06,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-03-01 17:28:06,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 161. [2022-03-01 17:28:06,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.75625) internal successors, (441), 160 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:06,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 441 transitions. [2022-03-01 17:28:06,969 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 441 transitions. Word has length 14 [2022-03-01 17:28:06,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:06,969 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 441 transitions. [2022-03-01 17:28:06,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:06,969 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 441 transitions. [2022-03-01 17:28:06,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:28:06,970 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:06,970 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:06,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:07,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:07,193 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:07,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:07,193 INFO L85 PathProgramCache]: Analyzing trace with hash -296165093, now seen corresponding path program 73 times [2022-03-01 17:28:07,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:07,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221367914] [2022-03-01 17:28:07,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:07,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:07,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:07,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:07,506 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:07,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221367914] [2022-03-01 17:28:07,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221367914] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:07,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540335633] [2022-03-01 17:28:07,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:07,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:07,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:07,507 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:07,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-03-01 17:28:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:07,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:28:07,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:07,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:07,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:07,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:07,949 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:28:07,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:07,951 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:28:07,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:07,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:08,560 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:28:08,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 208 treesize of output 188 [2022-03-01 17:28:08,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:08,577 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:08,577 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 172 treesize of output 166 [2022-03-01 17:28:08,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:08,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540335633] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:08,874 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:08,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 20 [2022-03-01 17:28:08,875 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034883588] [2022-03-01 17:28:08,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:08,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:28:08,875 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:08,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:28:08,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:28:08,875 INFO L87 Difference]: Start difference. First operand 161 states and 441 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:09,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:09,188 INFO L93 Difference]: Finished difference Result 212 states and 561 transitions. [2022-03-01 17:28:09,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:28:09,188 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:28:09,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:09,189 INFO L225 Difference]: With dead ends: 212 [2022-03-01 17:28:09,189 INFO L226 Difference]: Without dead ends: 210 [2022-03-01 17:28:09,189 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:09,189 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 77 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:09,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 14 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 268 Invalid, 0 Unknown, 77 Unchecked, 0.1s Time] [2022-03-01 17:28:09,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-03-01 17:28:09,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 159. [2022-03-01 17:28:09,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 2.7658227848101267) internal successors, (437), 158 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:09,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 437 transitions. [2022-03-01 17:28:09,192 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 437 transitions. Word has length 14 [2022-03-01 17:28:09,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:09,192 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 437 transitions. [2022-03-01 17:28:09,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:09,192 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 437 transitions. [2022-03-01 17:28:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:28:09,192 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:09,192 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:09,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-03-01 17:28:09,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:09,393 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:09,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:09,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1122656365, now seen corresponding path program 74 times [2022-03-01 17:28:09,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:09,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049183663] [2022-03-01 17:28:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:09,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:09,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:09,764 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:09,764 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:09,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049183663] [2022-03-01 17:28:09,764 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049183663] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:09,764 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189611327] [2022-03-01 17:28:09,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:09,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:09,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:09,765 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:09,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-03-01 17:28:09,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:09,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:09,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:28:09,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:10,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:10,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:10,185 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:28:10,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-03-01 17:28:10,191 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:28:10,191 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-01 17:28:10,265 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:10,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:10,811 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:28:10,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 221 treesize of output 201 [2022-03-01 17:28:10,815 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:10,830 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:10,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 185 treesize of output 179 [2022-03-01 17:28:11,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:11,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189611327] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:11,173 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:11,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:28:11,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685926832] [2022-03-01 17:28:11,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:11,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:28:11,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:11,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:28:11,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:28:11,174 INFO L87 Difference]: Start difference. First operand 159 states and 437 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:11,688 INFO L93 Difference]: Finished difference Result 199 states and 531 transitions. [2022-03-01 17:28:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:28:11,688 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:28:11,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:11,689 INFO L225 Difference]: With dead ends: 199 [2022-03-01 17:28:11,689 INFO L226 Difference]: Without dead ends: 196 [2022-03-01 17:28:11,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:28:11,689 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 7 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:11,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 13 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 306 Invalid, 0 Unknown, 7 Unchecked, 0.2s Time] [2022-03-01 17:28:11,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-01 17:28:11,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 160. [2022-03-01 17:28:11,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.7672955974842766) internal successors, (440), 159 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:11,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 440 transitions. [2022-03-01 17:28:11,692 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 440 transitions. Word has length 14 [2022-03-01 17:28:11,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:11,692 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 440 transitions. [2022-03-01 17:28:11,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:11,692 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 440 transitions. [2022-03-01 17:28:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:28:11,692 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:11,692 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:11,708 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-03-01 17:28:11,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:11,893 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1564789745, now seen corresponding path program 75 times [2022-03-01 17:28:11,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:11,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30456210] [2022-03-01 17:28:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:11,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:12,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:12,386 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:12,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30456210] [2022-03-01 17:28:12,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30456210] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:12,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094482247] [2022-03-01 17:28:12,387 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:12,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:12,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:12,392 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:12,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-03-01 17:28:12,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:28:12,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:12,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:28:12,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:12,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:12,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:12,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:12,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-03-01 17:28:12,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:12,832 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:28:12,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:12,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:13,488 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:28:13,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 231 treesize of output 211 [2022-03-01 17:28:13,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:13,505 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:13,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 195 treesize of output 189 [2022-03-01 17:28:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:13,802 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094482247] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:13,802 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:13,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:28:13,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174607374] [2022-03-01 17:28:13,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:13,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:28:13,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:13,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:28:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:28:13,803 INFO L87 Difference]: Start difference. First operand 160 states and 440 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:14,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:14,320 INFO L93 Difference]: Finished difference Result 199 states and 529 transitions. [2022-03-01 17:28:14,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:28:14,320 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:28:14,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:14,321 INFO L225 Difference]: With dead ends: 199 [2022-03-01 17:28:14,321 INFO L226 Difference]: Without dead ends: 196 [2022-03-01 17:28:14,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:28:14,323 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:14,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 12 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 269 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-03-01 17:28:14,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-03-01 17:28:14,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 161. [2022-03-01 17:28:14,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 2.7625) internal successors, (442), 160 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:14,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 442 transitions. [2022-03-01 17:28:14,326 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 442 transitions. Word has length 14 [2022-03-01 17:28:14,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:14,326 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 442 transitions. [2022-03-01 17:28:14,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:14,326 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 442 transitions. [2022-03-01 17:28:14,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-01 17:28:14,327 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:14,327 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:14,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:14,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-03-01 17:28:14,546 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:14,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:14,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1394087315, now seen corresponding path program 76 times [2022-03-01 17:28:14,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:14,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598996342] [2022-03-01 17:28:14,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:14,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:14,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:14,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:14,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:14,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598996342] [2022-03-01 17:28:14,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598996342] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:14,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110980669] [2022-03-01 17:28:14,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:14,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:14,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:14,998 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:14,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-03-01 17:28:15,021 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:15,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2022-03-01 17:28:15,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:15,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:15,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:28:15,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:15,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 83 treesize of output 67 [2022-03-01 17:28:15,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:15,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:28:15,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:15,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:16,089 INFO L353 Elim1Store]: treesize reduction 26, result has 50.9 percent of original size [2022-03-01 17:28:16,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 231 treesize of output 211 [2022-03-01 17:28:16,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:16,107 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:28:16,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 195 treesize of output 189 [2022-03-01 17:28:16,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:16,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110980669] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:16,357 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:16,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 20 [2022-03-01 17:28:16,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369961235] [2022-03-01 17:28:16,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:16,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:28:16,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:16,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:28:16,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:28:16,358 INFO L87 Difference]: Start difference. First operand 161 states and 442 transitions. Second operand has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:16,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:16,861 INFO L93 Difference]: Finished difference Result 199 states and 527 transitions. [2022-03-01 17:28:16,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-01 17:28:16,861 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2022-03-01 17:28:16,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:16,863 INFO L225 Difference]: With dead ends: 199 [2022-03-01 17:28:16,863 INFO L226 Difference]: Without dead ends: 197 [2022-03-01 17:28:16,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:28:16,864 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:16,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 11 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 224 Invalid, 0 Unknown, 48 Unchecked, 0.1s Time] [2022-03-01 17:28:16,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-03-01 17:28:16,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2022-03-01 17:28:16,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.7628205128205128) internal successors, (431), 156 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:16,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 431 transitions. [2022-03-01 17:28:16,867 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 431 transitions. Word has length 14 [2022-03-01 17:28:16,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:16,867 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 431 transitions. [2022-03-01 17:28:16,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.75) internal successors, (35), 20 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:16,867 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 431 transitions. [2022-03-01 17:28:16,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:16,868 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:16,868 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:16,885 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2022-03-01 17:28:17,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2022-03-01 17:28:17,075 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:17,075 INFO L85 PathProgramCache]: Analyzing trace with hash 351187333, now seen corresponding path program 77 times [2022-03-01 17:28:17,076 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:17,076 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3241439] [2022-03-01 17:28:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:17,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:17,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:17,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:17,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:17,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3241439] [2022-03-01 17:28:17,165 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3241439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:17,165 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552608027] [2022-03-01 17:28:17,165 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:17,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:17,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:17,166 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:17,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-03-01 17:28:17,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:28:17,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:17,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:17,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:17,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:28:17,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:28:17,338 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:17,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:17,428 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:28:17,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:28:17,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:17,448 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:17,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552608027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:17,448 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:17,448 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:28:17,448 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236565890] [2022-03-01 17:28:17,448 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:17,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:28:17,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:17,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:28:17,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:28:17,449 INFO L87 Difference]: Start difference. First operand 157 states and 431 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:17,738 INFO L93 Difference]: Finished difference Result 213 states and 547 transitions. [2022-03-01 17:28:17,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:28:17,738 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:17,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:17,739 INFO L225 Difference]: With dead ends: 213 [2022-03-01 17:28:17,739 INFO L226 Difference]: Without dead ends: 204 [2022-03-01 17:28:17,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:17,739 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:17,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 52 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:28:17,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-03-01 17:28:17,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2022-03-01 17:28:17,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 2.7777777777777777) internal successors, (425), 153 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:17,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 425 transitions. [2022-03-01 17:28:17,742 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 425 transitions. Word has length 15 [2022-03-01 17:28:17,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:17,742 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 425 transitions. [2022-03-01 17:28:17,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:17,742 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 425 transitions. [2022-03-01 17:28:17,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:17,742 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:17,742 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:17,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:17,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:17,947 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:17,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1964128883, now seen corresponding path program 78 times [2022-03-01 17:28:17,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:17,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77934870] [2022-03-01 17:28:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:17,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:18,028 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:18,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77934870] [2022-03-01 17:28:18,028 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77934870] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:18,028 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032745053] [2022-03-01 17:28:18,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:18,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:18,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:18,030 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:18,030 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-03-01 17:28:18,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:28:18,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:18,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:18,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:18,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:18,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:28:18,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:28:18,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:18,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:18,271 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:28:18,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:28:18,273 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:28:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:18,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1032745053] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:18,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:18,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:28:18,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127642751] [2022-03-01 17:28:18,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:18,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:28:18,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:18,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:28:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:28:18,284 INFO L87 Difference]: Start difference. First operand 154 states and 425 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:18,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:18,504 INFO L93 Difference]: Finished difference Result 213 states and 552 transitions. [2022-03-01 17:28:18,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:28:18,504 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:18,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:18,505 INFO L225 Difference]: With dead ends: 213 [2022-03-01 17:28:18,505 INFO L226 Difference]: Without dead ends: 213 [2022-03-01 17:28:18,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:28:18,505 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:18,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 50 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:28:18,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-03-01 17:28:18,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 155. [2022-03-01 17:28:18,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.779220779220779) internal successors, (428), 154 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:18,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 428 transitions. [2022-03-01 17:28:18,508 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 428 transitions. Word has length 15 [2022-03-01 17:28:18,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:18,508 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 428 transitions. [2022-03-01 17:28:18,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:18,508 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 428 transitions. [2022-03-01 17:28:18,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:18,508 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:18,508 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:18,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-03-01 17:28:18,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2022-03-01 17:28:18,715 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:18,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:18,716 INFO L85 PathProgramCache]: Analyzing trace with hash -313196909, now seen corresponding path program 79 times [2022-03-01 17:28:18,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:18,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873397718] [2022-03-01 17:28:18,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:18,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:18,825 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:18,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873397718] [2022-03-01 17:28:18,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873397718] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:18,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420170578] [2022-03-01 17:28:18,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:18,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:18,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:18,828 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:18,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-03-01 17:28:18,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:18,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:18,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:18,990 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:18,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:18,992 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:18,993 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:19,060 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:19,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:19,160 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:28:19,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:28:19,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:19,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420170578] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:19,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:19,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:19,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124823621] [2022-03-01 17:28:19,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:19,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:19,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:19,177 INFO L87 Difference]: Start difference. First operand 155 states and 428 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:19,506 INFO L93 Difference]: Finished difference Result 255 states and 618 transitions. [2022-03-01 17:28:19,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:19,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:19,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:19,507 INFO L225 Difference]: With dead ends: 255 [2022-03-01 17:28:19,508 INFO L226 Difference]: Without dead ends: 255 [2022-03-01 17:28:19,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:19,508 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 115 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:19,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 74 Invalid, 469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 445 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:19,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-03-01 17:28:19,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 160. [2022-03-01 17:28:19,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 2.79874213836478) internal successors, (445), 159 states have internal predecessors, (445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:19,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 445 transitions. [2022-03-01 17:28:19,510 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 445 transitions. Word has length 15 [2022-03-01 17:28:19,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:19,511 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 445 transitions. [2022-03-01 17:28:19,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:19,511 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 445 transitions. [2022-03-01 17:28:19,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:19,511 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:19,511 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:19,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-03-01 17:28:19,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:19,712 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:19,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:19,712 INFO L85 PathProgramCache]: Analyzing trace with hash 488419319, now seen corresponding path program 80 times [2022-03-01 17:28:19,712 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:19,712 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375765961] [2022-03-01 17:28:19,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:19,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:19,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:19,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:19,821 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:19,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375765961] [2022-03-01 17:28:19,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375765961] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:19,821 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632093590] [2022-03-01 17:28:19,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:19,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:19,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:19,824 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:19,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-03-01 17:28:19,851 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:19,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:19,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:19,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:19,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:19,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:19,963 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:19,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:20,046 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:20,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:20,180 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:28:20,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:28:20,182 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:28:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:20,194 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632093590] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:20,195 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:20,195 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:20,195 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130650021] [2022-03-01 17:28:20,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:20,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:20,195 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:20,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:20,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:20,196 INFO L87 Difference]: Start difference. First operand 160 states and 445 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:21,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:21,308 INFO L93 Difference]: Finished difference Result 286 states and 677 transitions. [2022-03-01 17:28:21,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:28:21,308 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:21,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:21,309 INFO L225 Difference]: With dead ends: 286 [2022-03-01 17:28:21,309 INFO L226 Difference]: Without dead ends: 279 [2022-03-01 17:28:21,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=350, Invalid=1812, Unknown=0, NotChecked=0, Total=2162 [2022-03-01 17:28:21,310 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 138 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:21,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 76 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:28:21,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-01 17:28:21,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 169. [2022-03-01 17:28:21,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 2.8214285714285716) internal successors, (474), 168 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:21,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 474 transitions. [2022-03-01 17:28:21,313 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 474 transitions. Word has length 15 [2022-03-01 17:28:21,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:21,313 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 474 transitions. [2022-03-01 17:28:21,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:21,313 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 474 transitions. [2022-03-01 17:28:21,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:21,313 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:21,313 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:21,329 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2022-03-01 17:28:21,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:21,514 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:21,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:21,514 INFO L85 PathProgramCache]: Analyzing trace with hash -2088204271, now seen corresponding path program 81 times [2022-03-01 17:28:21,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:21,514 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630492774] [2022-03-01 17:28:21,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:21,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:21,594 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:21,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630492774] [2022-03-01 17:28:21,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630492774] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:21,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040267256] [2022-03-01 17:28:21,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:21,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:21,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:21,596 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:21,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-03-01 17:28:21,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:28:21,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:21,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:28:21,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:21,729 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:21,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:21,731 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:21,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:21,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:21,889 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:28:21,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:28:21,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:28:21,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:21,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040267256] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:21,901 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:21,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:21,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821232005] [2022-03-01 17:28:21,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:21,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:21,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:21,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:21,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:21,902 INFO L87 Difference]: Start difference. First operand 169 states and 474 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:22,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:22,731 INFO L93 Difference]: Finished difference Result 288 states and 692 transitions. [2022-03-01 17:28:22,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:28:22,731 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:22,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:22,732 INFO L225 Difference]: With dead ends: 288 [2022-03-01 17:28:22,732 INFO L226 Difference]: Without dead ends: 288 [2022-03-01 17:28:22,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:28:22,733 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:22,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 58 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 591 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-01 17:28:22,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 167. [2022-03-01 17:28:22,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 2.8012048192771086) internal successors, (465), 166 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:22,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 465 transitions. [2022-03-01 17:28:22,736 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 465 transitions. Word has length 15 [2022-03-01 17:28:22,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:22,736 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 465 transitions. [2022-03-01 17:28:22,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:22,736 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 465 transitions. [2022-03-01 17:28:22,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:22,737 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:22,737 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:22,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:22,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:22,939 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:22,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:22,939 INFO L85 PathProgramCache]: Analyzing trace with hash 496149717, now seen corresponding path program 82 times [2022-03-01 17:28:22,940 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:22,940 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844343530] [2022-03-01 17:28:22,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:22,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:23,016 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:23,016 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:23,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844343530] [2022-03-01 17:28:23,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844343530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:23,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930187215] [2022-03-01 17:28:23,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:23,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:23,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:23,017 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:23,018 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-03-01 17:28:23,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:23,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:23,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:23,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:23,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:23,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:23,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:23,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:23,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:23,301 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:28:23,301 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:28:23,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:28:23,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:23,326 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930187215] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:23,326 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:23,327 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:23,327 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820919009] [2022-03-01 17:28:23,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:23,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:23,327 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:23,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:23,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:23,327 INFO L87 Difference]: Start difference. First operand 167 states and 465 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:24,148 INFO L93 Difference]: Finished difference Result 276 states and 678 transitions. [2022-03-01 17:28:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:28:24,149 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:24,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:24,150 INFO L225 Difference]: With dead ends: 276 [2022-03-01 17:28:24,150 INFO L226 Difference]: Without dead ends: 276 [2022-03-01 17:28:24,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=289, Invalid=1117, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:28:24,150 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 72 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 65 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:24,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 68 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 501 Invalid, 0 Unknown, 65 Unchecked, 0.2s Time] [2022-03-01 17:28:24,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-03-01 17:28:24,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 172. [2022-03-01 17:28:24,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 2.801169590643275) internal successors, (479), 171 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:24,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 479 transitions. [2022-03-01 17:28:24,153 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 479 transitions. Word has length 15 [2022-03-01 17:28:24,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:24,153 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 479 transitions. [2022-03-01 17:28:24,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:24,153 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 479 transitions. [2022-03-01 17:28:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:24,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:24,154 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:24,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:24,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:24,354 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:24,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:24,355 INFO L85 PathProgramCache]: Analyzing trace with hash 2103670903, now seen corresponding path program 83 times [2022-03-01 17:28:24,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:24,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31265059] [2022-03-01 17:28:24,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:24,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:24,435 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:24,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31265059] [2022-03-01 17:28:24,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31265059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:24,435 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977607524] [2022-03-01 17:28:24,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:24,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:24,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:24,436 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:24,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-03-01 17:28:24,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:28:24,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:24,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:24,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:24,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:24,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:24,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:24,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:24,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:24,734 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:28:24,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:28:24,736 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:28:24,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:24,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977607524] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:24,746 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:24,746 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:24,746 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096231276] [2022-03-01 17:28:24,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:24,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:24,746 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:24,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:24,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:24,747 INFO L87 Difference]: Start difference. First operand 172 states and 479 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:25,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:25,314 INFO L93 Difference]: Finished difference Result 262 states and 657 transitions. [2022-03-01 17:28:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:28:25,315 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:25,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:25,315 INFO L225 Difference]: With dead ends: 262 [2022-03-01 17:28:25,315 INFO L226 Difference]: Without dead ends: 262 [2022-03-01 17:28:25,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=795, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:28:25,316 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 445 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:25,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 56 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 445 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-03-01 17:28:25,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-03-01 17:28:25,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 170. [2022-03-01 17:28:25,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.798816568047337) internal successors, (473), 169 states have internal predecessors, (473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:25,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 473 transitions. [2022-03-01 17:28:25,322 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 473 transitions. Word has length 15 [2022-03-01 17:28:25,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:25,322 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 473 transitions. [2022-03-01 17:28:25,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:25,322 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 473 transitions. [2022-03-01 17:28:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:25,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:25,323 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:25,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2022-03-01 17:28:25,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:25,538 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:25,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:25,539 INFO L85 PathProgramCache]: Analyzing trace with hash -993255279, now seen corresponding path program 84 times [2022-03-01 17:28:25,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:25,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523227567] [2022-03-01 17:28:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:25,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:25,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:25,618 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:25,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523227567] [2022-03-01 17:28:25,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523227567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:25,618 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113119680] [2022-03-01 17:28:25,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:25,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:25,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:25,619 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:25,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-03-01 17:28:25,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:28:25,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:25,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:25,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:25,764 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:25,764 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:25,767 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:25,767 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:25,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:25,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:25,890 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:28:25,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:28:25,892 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:28:25,902 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:25,902 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113119680] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:25,902 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:25,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:28:25,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619164141] [2022-03-01 17:28:25,902 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:25,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:25,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:25,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:25,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:25,903 INFO L87 Difference]: Start difference. First operand 170 states and 473 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:26,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:26,143 INFO L93 Difference]: Finished difference Result 247 states and 636 transitions. [2022-03-01 17:28:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:28:26,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:26,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:26,144 INFO L225 Difference]: With dead ends: 247 [2022-03-01 17:28:26,145 INFO L226 Difference]: Without dead ends: 247 [2022-03-01 17:28:26,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:26,145 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:26,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 56 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 315 Invalid, 0 Unknown, 85 Unchecked, 0.1s Time] [2022-03-01 17:28:26,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-03-01 17:28:26,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 171. [2022-03-01 17:28:26,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.8) internal successors, (476), 170 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:26,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 476 transitions. [2022-03-01 17:28:26,148 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 476 transitions. Word has length 15 [2022-03-01 17:28:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:26,148 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 476 transitions. [2022-03-01 17:28:26,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 476 transitions. [2022-03-01 17:28:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:26,148 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:26,148 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:26,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2022-03-01 17:28:26,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2022-03-01 17:28:26,349 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:26,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1951654055, now seen corresponding path program 85 times [2022-03-01 17:28:26,349 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:26,349 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100436929] [2022-03-01 17:28:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:26,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:26,442 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:26,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100436929] [2022-03-01 17:28:26,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100436929] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:26,442 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635393943] [2022-03-01 17:28:26,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:26,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:26,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:26,443 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:26,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-03-01 17:28:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:26,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:26,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:26,639 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:26,640 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:26,643 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:26,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:26,668 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:26,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:26,769 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:28:26,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:28:26,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:28:26,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:26,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635393943] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:26,780 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:26,780 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:28:26,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814572431] [2022-03-01 17:28:26,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:26,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:26,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:26,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:26,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:26,781 INFO L87 Difference]: Start difference. First operand 171 states and 476 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:27,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:27,036 INFO L93 Difference]: Finished difference Result 245 states and 630 transitions. [2022-03-01 17:28:27,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:28:27,037 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:27,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:27,038 INFO L225 Difference]: With dead ends: 245 [2022-03-01 17:28:27,038 INFO L226 Difference]: Without dead ends: 245 [2022-03-01 17:28:27,039 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:27,039 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 44 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:27,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 70 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 364 Invalid, 0 Unknown, 131 Unchecked, 0.1s Time] [2022-03-01 17:28:27,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-03-01 17:28:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 175. [2022-03-01 17:28:27,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 2.7873563218390807) internal successors, (485), 174 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 485 transitions. [2022-03-01 17:28:27,043 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 485 transitions. Word has length 15 [2022-03-01 17:28:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:27,043 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 485 transitions. [2022-03-01 17:28:27,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 485 transitions. [2022-03-01 17:28:27,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:27,044 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:27,044 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:27,061 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-03-01 17:28:27,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2022-03-01 17:28:27,251 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:27,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1780951625, now seen corresponding path program 86 times [2022-03-01 17:28:27,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:27,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612602733] [2022-03-01 17:28:27,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:27,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:27,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:27,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:27,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612602733] [2022-03-01 17:28:27,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612602733] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:27,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676144051] [2022-03-01 17:28:27,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:27,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:27,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:27,326 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:27,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-03-01 17:28:27,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:27,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:27,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:27,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:27,493 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:27,494 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:27,496 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:27,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:27,517 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:27,635 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:28:27,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:28:27,636 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:28:27,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:27,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676144051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:27,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:27,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:28:27,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957750815] [2022-03-01 17:28:27,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:27,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:27,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:27,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:27,647 INFO L87 Difference]: Start difference. First operand 175 states and 485 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:27,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:27,887 INFO L93 Difference]: Finished difference Result 246 states and 629 transitions. [2022-03-01 17:28:27,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:28:27,888 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:27,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:27,889 INFO L225 Difference]: With dead ends: 246 [2022-03-01 17:28:27,889 INFO L226 Difference]: Without dead ends: 246 [2022-03-01 17:28:27,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:27,889 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:27,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 40 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 337 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-03-01 17:28:27,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-01 17:28:27,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 173. [2022-03-01 17:28:27,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.796511627906977) internal successors, (481), 172 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 481 transitions. [2022-03-01 17:28:27,892 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 481 transitions. Word has length 15 [2022-03-01 17:28:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:27,892 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 481 transitions. [2022-03-01 17:28:27,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 481 transitions. [2022-03-01 17:28:27,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:27,893 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:27,893 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:27,909 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2022-03-01 17:28:28,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2022-03-01 17:28:28,095 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:28,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:28,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1505045545, now seen corresponding path program 87 times [2022-03-01 17:28:28,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:28,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893273506] [2022-03-01 17:28:28,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:28,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:28,181 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:28,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893273506] [2022-03-01 17:28:28,181 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893273506] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:28,181 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279654917] [2022-03-01 17:28:28,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:28,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:28,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:28,183 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:28,185 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-03-01 17:28:28,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:28:28,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:28,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 20 conjunts are in the unsatisfiable core [2022-03-01 17:28:28,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:28,314 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:28,315 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:28,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:28,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:28:28,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:28,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:28:28,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:28,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:28,423 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:28,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:28:28,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:28:28,442 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:28,442 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279654917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:28,442 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:28,442 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:28,442 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748200551] [2022-03-01 17:28:28,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:28,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:28,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:28,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:28,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:28,443 INFO L87 Difference]: Start difference. First operand 173 states and 481 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:28,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:28,714 INFO L93 Difference]: Finished difference Result 258 states and 636 transitions. [2022-03-01 17:28:28,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:28:28,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:28,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:28,716 INFO L225 Difference]: With dead ends: 258 [2022-03-01 17:28:28,716 INFO L226 Difference]: Without dead ends: 258 [2022-03-01 17:28:28,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:28:28,716 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 55 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:28,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 90 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-01 17:28:28,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 179. [2022-03-01 17:28:28,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 2.837078651685393) internal successors, (505), 178 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 505 transitions. [2022-03-01 17:28:28,720 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 505 transitions. Word has length 15 [2022-03-01 17:28:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:28,720 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 505 transitions. [2022-03-01 17:28:28,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:28,720 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 505 transitions. [2022-03-01 17:28:28,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:28,721 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:28,721 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:28,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2022-03-01 17:28:28,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-03-01 17:28:28,927 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:28,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:28,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1870221043, now seen corresponding path program 88 times [2022-03-01 17:28:28,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:28,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439855836] [2022-03-01 17:28:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:28,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:29,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:29,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439855836] [2022-03-01 17:28:29,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439855836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:29,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156968777] [2022-03-01 17:28:29,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:29,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:29,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:29,005 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:29,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-03-01 17:28:29,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:29,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:29,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:29,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:29,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:29,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:28:29,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:29,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:28:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:29,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:29,240 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:29,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:28:29,242 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:29,267 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:29,267 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156968777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:29,267 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:29,267 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:29,267 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837843334] [2022-03-01 17:28:29,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:29,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:29,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:29,268 INFO L87 Difference]: Start difference. First operand 179 states and 505 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:29,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:29,579 INFO L93 Difference]: Finished difference Result 242 states and 606 transitions. [2022-03-01 17:28:29,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:28:29,579 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:29,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:29,580 INFO L225 Difference]: With dead ends: 242 [2022-03-01 17:28:29,580 INFO L226 Difference]: Without dead ends: 238 [2022-03-01 17:28:29,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:28:29,580 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 54 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:29,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 64 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:29,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-03-01 17:28:29,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 180. [2022-03-01 17:28:29,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.815642458100559) internal successors, (504), 179 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:29,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 504 transitions. [2022-03-01 17:28:29,583 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 504 transitions. Word has length 15 [2022-03-01 17:28:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:29,583 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 504 transitions. [2022-03-01 17:28:29,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:29,584 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 504 transitions. [2022-03-01 17:28:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:29,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:29,584 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:29,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-03-01 17:28:29,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:29,799 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:29,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:29,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1497315147, now seen corresponding path program 89 times [2022-03-01 17:28:29,799 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:29,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20990212] [2022-03-01 17:28:29,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:29,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:29,888 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:29,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20990212] [2022-03-01 17:28:29,888 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20990212] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:29,888 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89120904] [2022-03-01 17:28:29,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:29,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:29,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:29,889 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:29,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-03-01 17:28:29,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:28:29,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:29,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:29,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:29,995 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:29,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:29,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:29,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:30,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:30,144 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:30,145 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:28:30,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:28:30,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:30,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89120904] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:30,162 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:30,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:30,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593951070] [2022-03-01 17:28:30,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:30,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:30,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:30,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:30,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:30,163 INFO L87 Difference]: Start difference. First operand 180 states and 504 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:30,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:30,460 INFO L93 Difference]: Finished difference Result 304 states and 701 transitions. [2022-03-01 17:28:30,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:28:30,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:30,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:30,460 INFO L225 Difference]: With dead ends: 304 [2022-03-01 17:28:30,460 INFO L226 Difference]: Without dead ends: 303 [2022-03-01 17:28:30,461 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:28:30,461 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 97 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:30,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 70 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:30,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-01 17:28:30,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 180. [2022-03-01 17:28:30,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.815642458100559) internal successors, (504), 179 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:30,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 504 transitions. [2022-03-01 17:28:30,464 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 504 transitions. Word has length 15 [2022-03-01 17:28:30,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:30,465 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 504 transitions. [2022-03-01 17:28:30,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:30,465 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 504 transitions. [2022-03-01 17:28:30,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:30,465 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:30,465 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:30,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-03-01 17:28:30,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-03-01 17:28:30,675 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:30,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:30,675 INFO L85 PathProgramCache]: Analyzing trace with hash -695698919, now seen corresponding path program 90 times [2022-03-01 17:28:30,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:30,676 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736136894] [2022-03-01 17:28:30,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:30,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:30,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:30,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:30,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736136894] [2022-03-01 17:28:30,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736136894] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:30,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779672721] [2022-03-01 17:28:30,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:30,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:30,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:30,750 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:30,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-03-01 17:28:30,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:28:30,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:30,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:30,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:30,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:30,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:30,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:30,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:30,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:30,985 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:30,985 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:28:30,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:31,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779672721] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:31,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:31,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:31,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620261866] [2022-03-01 17:28:31,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:31,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:31,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:31,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:31,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:31,011 INFO L87 Difference]: Start difference. First operand 180 states and 504 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:31,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:31,394 INFO L93 Difference]: Finished difference Result 278 states and 659 transitions. [2022-03-01 17:28:31,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:28:31,394 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:31,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:31,395 INFO L225 Difference]: With dead ends: 278 [2022-03-01 17:28:31,395 INFO L226 Difference]: Without dead ends: 274 [2022-03-01 17:28:31,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:28:31,395 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 100 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:31,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 58 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:31,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2022-03-01 17:28:31,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 182. [2022-03-01 17:28:31,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 2.7955801104972378) internal successors, (506), 181 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:31,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 506 transitions. [2022-03-01 17:28:31,399 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 506 transitions. Word has length 15 [2022-03-01 17:28:31,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:31,399 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 506 transitions. [2022-03-01 17:28:31,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:31,399 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 506 transitions. [2022-03-01 17:28:31,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:31,399 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:31,399 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:31,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-03-01 17:28:31,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-03-01 17:28:31,607 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:31,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1022644787, now seen corresponding path program 91 times [2022-03-01 17:28:31,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:31,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626321374] [2022-03-01 17:28:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:31,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:31,680 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:31,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626321374] [2022-03-01 17:28:31,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626321374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:31,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64565185] [2022-03-01 17:28:31,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:31,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:31,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:31,682 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:31,686 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-03-01 17:28:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:31,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:31,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:31,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:31,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:31,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:31,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:31,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:31,906 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:31,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:28:31,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:31,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64565185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:31,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:31,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:31,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278943044] [2022-03-01 17:28:31,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:31,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:31,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:31,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:31,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:31,929 INFO L87 Difference]: Start difference. First operand 182 states and 506 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:32,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:32,245 INFO L93 Difference]: Finished difference Result 264 states and 638 transitions. [2022-03-01 17:28:32,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:28:32,245 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:32,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:32,246 INFO L225 Difference]: With dead ends: 264 [2022-03-01 17:28:32,246 INFO L226 Difference]: Without dead ends: 264 [2022-03-01 17:28:32,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:32,246 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:32,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 102 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-03-01 17:28:32,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 180. [2022-03-01 17:28:32,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 2.7709497206703912) internal successors, (496), 179 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:32,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 496 transitions. [2022-03-01 17:28:32,248 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 496 transitions. Word has length 15 [2022-03-01 17:28:32,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:32,249 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 496 transitions. [2022-03-01 17:28:32,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:32,249 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 496 transitions. [2022-03-01 17:28:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:32,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:32,249 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:32,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-03-01 17:28:32,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-03-01 17:28:32,449 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:32,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:32,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1379198957, now seen corresponding path program 92 times [2022-03-01 17:28:32,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:32,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357491227] [2022-03-01 17:28:32,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:32,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:32,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:32,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:32,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:32,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357491227] [2022-03-01 17:28:32,523 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357491227] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:32,523 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179040136] [2022-03-01 17:28:32,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:32,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:32,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:32,524 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:32,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-03-01 17:28:32,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:32,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:32,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:32,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:32,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:32,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:32,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:32,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:32,696 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:32,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:32,758 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:32,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:28:32,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:32,780 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179040136] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:32,781 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:32,781 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:32,781 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139361281] [2022-03-01 17:28:32,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:32,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:32,781 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:32,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:32,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:32,781 INFO L87 Difference]: Start difference. First operand 180 states and 496 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:33,294 INFO L93 Difference]: Finished difference Result 264 states and 630 transitions. [2022-03-01 17:28:33,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:28:33,295 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:33,295 INFO L225 Difference]: With dead ends: 264 [2022-03-01 17:28:33,295 INFO L226 Difference]: Without dead ends: 260 [2022-03-01 17:28:33,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:28:33,296 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 80 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:33,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 86 Invalid, 619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-03-01 17:28:33,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 184. [2022-03-01 17:28:33,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 2.748633879781421) internal successors, (503), 183 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:33,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 503 transitions. [2022-03-01 17:28:33,299 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 503 transitions. Word has length 15 [2022-03-01 17:28:33,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:33,299 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 503 transitions. [2022-03-01 17:28:33,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:33,299 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 503 transitions. [2022-03-01 17:28:33,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:33,300 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:33,300 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:33,319 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-03-01 17:28:33,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2022-03-01 17:28:33,511 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:33,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:33,511 INFO L85 PathProgramCache]: Analyzing trace with hash 349848377, now seen corresponding path program 93 times [2022-03-01 17:28:33,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:33,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991339947] [2022-03-01 17:28:33,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:33,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:33,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:33,587 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:33,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991339947] [2022-03-01 17:28:33,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991339947] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:33,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886885109] [2022-03-01 17:28:33,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:33,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:33,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:33,589 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:33,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-03-01 17:28:33,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:28:33,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:33,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:33,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:33,735 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:33,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:28:33,737 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:33,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:28:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:33,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:33,837 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:33,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:28:33,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:33,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:33,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886885109] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:33,860 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:33,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:33,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245526277] [2022-03-01 17:28:33,860 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:33,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:33,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:33,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:33,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:33,861 INFO L87 Difference]: Start difference. First operand 184 states and 503 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:34,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:34,201 INFO L93 Difference]: Finished difference Result 234 states and 583 transitions. [2022-03-01 17:28:34,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:28:34,201 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:34,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:34,202 INFO L225 Difference]: With dead ends: 234 [2022-03-01 17:28:34,202 INFO L226 Difference]: Without dead ends: 226 [2022-03-01 17:28:34,202 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:28:34,202 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 51 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:34,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 72 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 457 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-03-01 17:28:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2022-03-01 17:28:34,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 186. [2022-03-01 17:28:34,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.7243243243243245) internal successors, (504), 185 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 504 transitions. [2022-03-01 17:28:34,205 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 504 transitions. Word has length 15 [2022-03-01 17:28:34,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:34,205 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 504 transitions. [2022-03-01 17:28:34,205 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:34,206 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 504 transitions. [2022-03-01 17:28:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:34,206 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:34,206 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:34,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:34,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:34,419 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:34,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:34,419 INFO L85 PathProgramCache]: Analyzing trace with hash 2117593779, now seen corresponding path program 94 times [2022-03-01 17:28:34,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:34,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544667467] [2022-03-01 17:28:34,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:34,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:34,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:34,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:34,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544667467] [2022-03-01 17:28:34,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544667467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:34,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600878518] [2022-03-01 17:28:34,493 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:34,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:34,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:34,494 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:34,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-03-01 17:28:34,516 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:34,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:34,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:34,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:34,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:34,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:34,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:34,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:34,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:34,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:34,721 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:34,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:28:34,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:28:34,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:34,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1600878518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:34,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:34,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:34,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369701575] [2022-03-01 17:28:34,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:34,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:34,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:34,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:34,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:34,739 INFO L87 Difference]: Start difference. First operand 186 states and 504 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:34,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:34,963 INFO L93 Difference]: Finished difference Result 277 states and 671 transitions. [2022-03-01 17:28:34,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:34,964 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:34,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:34,964 INFO L225 Difference]: With dead ends: 277 [2022-03-01 17:28:34,964 INFO L226 Difference]: Without dead ends: 277 [2022-03-01 17:28:34,964 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:28:34,964 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 41 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:34,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 88 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 422 Invalid, 0 Unknown, 41 Unchecked, 0.2s Time] [2022-03-01 17:28:34,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2022-03-01 17:28:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 190. [2022-03-01 17:28:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 2.7354497354497354) internal successors, (517), 189 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 517 transitions. [2022-03-01 17:28:34,968 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 517 transitions. Word has length 15 [2022-03-01 17:28:34,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:34,968 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 517 transitions. [2022-03-01 17:28:34,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 517 transitions. [2022-03-01 17:28:34,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:34,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:34,968 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:34,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-03-01 17:28:35,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2022-03-01 17:28:35,169 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:35,169 INFO L85 PathProgramCache]: Analyzing trace with hash -1913634763, now seen corresponding path program 95 times [2022-03-01 17:28:35,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:35,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316553787] [2022-03-01 17:28:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:35,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:35,251 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:35,251 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:35,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316553787] [2022-03-01 17:28:35,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316553787] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:35,252 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671612601] [2022-03-01 17:28:35,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:35,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:35,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:35,253 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:35,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-03-01 17:28:35,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:28:35,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:35,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:35,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:35,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:35,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:35,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:35,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:35,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:35,534 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:35,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:28:35,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:35,555 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671612601] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:35,555 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:35,555 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:28:35,555 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029139010] [2022-03-01 17:28:35,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:35,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:35,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:35,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:35,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:35,555 INFO L87 Difference]: Start difference. First operand 190 states and 517 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:35,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:35,808 INFO L93 Difference]: Finished difference Result 282 states and 676 transitions. [2022-03-01 17:28:35,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:28:35,808 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:35,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:35,808 INFO L225 Difference]: With dead ends: 282 [2022-03-01 17:28:35,808 INFO L226 Difference]: Without dead ends: 282 [2022-03-01 17:28:35,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:28:35,809 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 101 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:35,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 78 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:35,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2022-03-01 17:28:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 195. [2022-03-01 17:28:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.768041237113402) internal successors, (537), 194 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:35,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 537 transitions. [2022-03-01 17:28:35,812 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 537 transitions. Word has length 15 [2022-03-01 17:28:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:35,812 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 537 transitions. [2022-03-01 17:28:35,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:35,812 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 537 transitions. [2022-03-01 17:28:35,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:35,812 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:35,812 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:35,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-03-01 17:28:36,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:36,013 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:36,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:36,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1112018535, now seen corresponding path program 96 times [2022-03-01 17:28:36,013 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:36,013 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76198768] [2022-03-01 17:28:36,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:36,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:36,087 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:36,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76198768] [2022-03-01 17:28:36,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76198768] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:36,088 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342535106] [2022-03-01 17:28:36,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:36,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:36,089 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:36,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-03-01 17:28:36,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:28:36,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:36,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:36,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:36,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:36,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:36,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:36,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:36,279 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:36,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:36,394 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:36,394 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:36,396 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:36,414 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342535106] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:36,414 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:36,414 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:28:36,414 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253767486] [2022-03-01 17:28:36,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:36,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:36,414 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:36,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:36,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:36,415 INFO L87 Difference]: Start difference. First operand 195 states and 537 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:37,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:37,276 INFO L93 Difference]: Finished difference Result 299 states and 709 transitions. [2022-03-01 17:28:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:28:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:37,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:37,277 INFO L225 Difference]: With dead ends: 299 [2022-03-01 17:28:37,277 INFO L226 Difference]: Without dead ends: 291 [2022-03-01 17:28:37,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:28:37,278 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:37,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 64 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:28:37,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2022-03-01 17:28:37,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 204. [2022-03-01 17:28:37,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 2.7832512315270934) internal successors, (565), 203 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 565 transitions. [2022-03-01 17:28:37,281 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 565 transitions. Word has length 15 [2022-03-01 17:28:37,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:37,281 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 565 transitions. [2022-03-01 17:28:37,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:37,281 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 565 transitions. [2022-03-01 17:28:37,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:37,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:37,281 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:37,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2022-03-01 17:28:37,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:37,482 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:37,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash 606325171, now seen corresponding path program 97 times [2022-03-01 17:28:37,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:37,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880047525] [2022-03-01 17:28:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:37,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:37,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:37,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880047525] [2022-03-01 17:28:37,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880047525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:37,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604048101] [2022-03-01 17:28:37,571 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:37,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:37,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:37,572 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:37,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2022-03-01 17:28:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:37,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:37,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:37,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:37,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:37,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:37,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:37,744 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:37,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:37,831 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:37,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:37,833 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:37,847 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:37,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604048101] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:37,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:37,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:28:37,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754307880] [2022-03-01 17:28:37,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:37,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:37,847 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:37,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:37,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:37,848 INFO L87 Difference]: Start difference. First operand 204 states and 565 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:38,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:38,414 INFO L93 Difference]: Finished difference Result 284 states and 693 transitions. [2022-03-01 17:28:38,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:28:38,414 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:38,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:38,415 INFO L225 Difference]: With dead ends: 284 [2022-03-01 17:28:38,415 INFO L226 Difference]: Without dead ends: 284 [2022-03-01 17:28:38,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:28:38,415 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:38,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 44 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:38,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-03-01 17:28:38,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 195. [2022-03-01 17:28:38,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.731958762886598) internal successors, (530), 194 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 530 transitions. [2022-03-01 17:28:38,419 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 530 transitions. Word has length 15 [2022-03-01 17:28:38,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:38,419 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 530 transitions. [2022-03-01 17:28:38,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:38,419 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 530 transitions. [2022-03-01 17:28:38,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:38,420 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:38,420 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:38,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:38,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:38,633 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:38,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:38,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1104288137, now seen corresponding path program 98 times [2022-03-01 17:28:38,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:38,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314282806] [2022-03-01 17:28:38,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:38,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:38,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:38,730 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:38,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314282806] [2022-03-01 17:28:38,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314282806] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:38,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343063567] [2022-03-01 17:28:38,730 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:38,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:38,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:38,734 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:38,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2022-03-01 17:28:38,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:38,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:38,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:38,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:38,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:38,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:38,877 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:38,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:38,904 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:38,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:38,994 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:38,994 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:38,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:39,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343063567] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:39,010 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:39,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:28:39,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598892258] [2022-03-01 17:28:39,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:39,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:39,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:39,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:39,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:39,011 INFO L87 Difference]: Start difference. First operand 195 states and 530 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:39,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:39,345 INFO L93 Difference]: Finished difference Result 246 states and 634 transitions. [2022-03-01 17:28:39,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:28:39,346 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:39,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:39,346 INFO L225 Difference]: With dead ends: 246 [2022-03-01 17:28:39,346 INFO L226 Difference]: Without dead ends: 246 [2022-03-01 17:28:39,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:28:39,347 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 22 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:39,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 70 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 366 Invalid, 0 Unknown, 38 Unchecked, 0.1s Time] [2022-03-01 17:28:39,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-03-01 17:28:39,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 202. [2022-03-01 17:28:39,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 2.736318407960199) internal successors, (550), 201 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:39,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 550 transitions. [2022-03-01 17:28:39,349 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 550 transitions. Word has length 15 [2022-03-01 17:28:39,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:39,349 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 550 transitions. [2022-03-01 17:28:39,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:39,350 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 550 transitions. [2022-03-01 17:28:39,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:39,350 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:39,350 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:39,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2022-03-01 17:28:39,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2022-03-01 17:28:39,551 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:39,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:39,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1215110657, now seen corresponding path program 99 times [2022-03-01 17:28:39,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:39,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789833457] [2022-03-01 17:28:39,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:39,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:39,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:39,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:39,656 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:39,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789833457] [2022-03-01 17:28:39,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789833457] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:39,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943871521] [2022-03-01 17:28:39,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:39,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:39,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:39,657 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:39,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2022-03-01 17:28:39,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:28:39,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:39,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:39,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:39,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:39,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:39,804 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:39,805 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:39,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:39,925 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:39,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:39,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:39,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:39,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943871521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:39,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:39,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:28:39,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038604368] [2022-03-01 17:28:39,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:39,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:39,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:39,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:39,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:39,941 INFO L87 Difference]: Start difference. First operand 202 states and 550 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:40,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:40,376 INFO L93 Difference]: Finished difference Result 260 states and 654 transitions. [2022-03-01 17:28:40,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:28:40,377 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:40,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:40,377 INFO L225 Difference]: With dead ends: 260 [2022-03-01 17:28:40,377 INFO L226 Difference]: Without dead ends: 260 [2022-03-01 17:28:40,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:28:40,378 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:40,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 46 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 482 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-03-01 17:28:40,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-03-01 17:28:40,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 194. [2022-03-01 17:28:40,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.7202072538860103) internal successors, (525), 193 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:40,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 525 transitions. [2022-03-01 17:28:40,381 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 525 transitions. Word has length 15 [2022-03-01 17:28:40,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:40,381 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 525 transitions. [2022-03-01 17:28:40,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:40,382 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 525 transitions. [2022-03-01 17:28:40,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:40,382 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:40,382 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:40,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2022-03-01 17:28:40,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:40,591 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:40,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:40,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1701274163, now seen corresponding path program 100 times [2022-03-01 17:28:40,592 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:40,592 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019241368] [2022-03-01 17:28:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:40,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:40,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:40,682 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:40,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019241368] [2022-03-01 17:28:40,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019241368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:40,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141530861] [2022-03-01 17:28:40,682 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:40,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:40,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:40,686 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:40,687 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2022-03-01 17:28:40,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:40,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:40,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:40,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:40,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:40,818 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:40,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:40,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:40,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:40,923 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:40,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:40,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:40,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141530861] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:40,940 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:40,940 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:40,940 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002061065] [2022-03-01 17:28:40,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:40,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:40,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:40,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:40,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:40,941 INFO L87 Difference]: Start difference. First operand 194 states and 525 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:41,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:41,075 INFO L93 Difference]: Finished difference Result 236 states and 613 transitions. [2022-03-01 17:28:41,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:41,075 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:41,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:41,076 INFO L225 Difference]: With dead ends: 236 [2022-03-01 17:28:41,076 INFO L226 Difference]: Without dead ends: 236 [2022-03-01 17:28:41,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:41,076 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 26 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:41,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 42 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 235 Invalid, 0 Unknown, 59 Unchecked, 0.1s Time] [2022-03-01 17:28:41,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-01 17:28:41,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 197. [2022-03-01 17:28:41,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.7244897959183674) internal successors, (534), 196 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:41,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 534 transitions. [2022-03-01 17:28:41,079 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 534 transitions. Word has length 15 [2022-03-01 17:28:41,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:41,079 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 534 transitions. [2022-03-01 17:28:41,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:41,079 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 534 transitions. [2022-03-01 17:28:41,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:41,079 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:41,079 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:41,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:41,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:41,299 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:41,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:41,300 INFO L85 PathProgramCache]: Analyzing trace with hash -986171947, now seen corresponding path program 101 times [2022-03-01 17:28:41,300 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:41,300 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127874698] [2022-03-01 17:28:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:41,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:41,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:41,376 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:41,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127874698] [2022-03-01 17:28:41,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127874698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:41,376 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359390414] [2022-03-01 17:28:41,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:41,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:41,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:41,377 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:41,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2022-03-01 17:28:41,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:28:41,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:41,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:41,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:41,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:41,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:41,533 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:41,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:41,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:41,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:41,646 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:41,646 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:41,647 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:41,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:41,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359390414] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:41,662 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:41,662 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:41,662 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780346986] [2022-03-01 17:28:41,662 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:41,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:41,662 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:41,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:41,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:41,662 INFO L87 Difference]: Start difference. First operand 197 states and 534 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:41,804 INFO L93 Difference]: Finished difference Result 236 states and 611 transitions. [2022-03-01 17:28:41,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:41,805 INFO L225 Difference]: With dead ends: 236 [2022-03-01 17:28:41,805 INFO L226 Difference]: Without dead ends: 236 [2022-03-01 17:28:41,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:41,805 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 21 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:41,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 50 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 288 Invalid, 0 Unknown, 69 Unchecked, 0.1s Time] [2022-03-01 17:28:41,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-03-01 17:28:41,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 197. [2022-03-01 17:28:41,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 2.7244897959183674) internal successors, (534), 196 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:41,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 534 transitions. [2022-03-01 17:28:41,809 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 534 transitions. Word has length 15 [2022-03-01 17:28:41,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:41,809 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 534 transitions. [2022-03-01 17:28:41,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 534 transitions. [2022-03-01 17:28:41,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:41,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:41,809 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:41,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2022-03-01 17:28:42,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2022-03-01 17:28:42,010 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:42,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:42,010 INFO L85 PathProgramCache]: Analyzing trace with hash -815469517, now seen corresponding path program 102 times [2022-03-01 17:28:42,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:42,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131343337] [2022-03-01 17:28:42,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:42,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:42,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:42,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:42,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131343337] [2022-03-01 17:28:42,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131343337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:42,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165802846] [2022-03-01 17:28:42,083 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:42,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:42,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:42,084 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:42,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2022-03-01 17:28:42,107 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:28:42,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:42,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:42,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:42,236 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:42,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:42,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:42,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:42,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:42,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:42,348 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:42,348 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:42,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:42,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165802846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:42,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:42,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:28:42,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017976329] [2022-03-01 17:28:42,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:42,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:42,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:42,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:42,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:42,370 INFO L87 Difference]: Start difference. First operand 197 states and 534 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:42,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:42,569 INFO L93 Difference]: Finished difference Result 249 states and 638 transitions. [2022-03-01 17:28:42,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:42,570 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:42,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:42,570 INFO L225 Difference]: With dead ends: 249 [2022-03-01 17:28:42,571 INFO L226 Difference]: Without dead ends: 249 [2022-03-01 17:28:42,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:42,571 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 289 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:42,571 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 32 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 289 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-01 17:28:42,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-03-01 17:28:42,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 194. [2022-03-01 17:28:42,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.7202072538860103) internal successors, (525), 193 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 525 transitions. [2022-03-01 17:28:42,574 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 525 transitions. Word has length 15 [2022-03-01 17:28:42,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:42,575 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 525 transitions. [2022-03-01 17:28:42,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 525 transitions. [2022-03-01 17:28:42,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:42,575 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:42,575 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:42,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:42,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2022-03-01 17:28:42,776 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:42,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:42,776 INFO L85 PathProgramCache]: Analyzing trace with hash 202352403, now seen corresponding path program 103 times [2022-03-01 17:28:42,776 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:42,776 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231867815] [2022-03-01 17:28:42,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:42,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:42,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:42,852 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:42,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231867815] [2022-03-01 17:28:42,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231867815] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:42,852 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023157764] [2022-03-01 17:28:42,852 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:42,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:42,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:42,853 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:42,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2022-03-01 17:28:42,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:42,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:42,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:43,001 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:43,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:43,004 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:43,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:28:43,007 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:43,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:28:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:43,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:43,114 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:43,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:43,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:43,130 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:43,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023157764] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:43,130 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:43,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:28:43,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892689931] [2022-03-01 17:28:43,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:43,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:43,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:43,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:43,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:43,131 INFO L87 Difference]: Start difference. First operand 194 states and 525 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:43,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:43,362 INFO L93 Difference]: Finished difference Result 271 states and 665 transitions. [2022-03-01 17:28:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:43,363 INFO L225 Difference]: With dead ends: 271 [2022-03-01 17:28:43,363 INFO L226 Difference]: Without dead ends: 271 [2022-03-01 17:28:43,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:28:43,364 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 48 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:43,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 132 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2022-03-01 17:28:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 205. [2022-03-01 17:28:43,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 2.764705882352941) internal successors, (564), 204 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 564 transitions. [2022-03-01 17:28:43,366 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 564 transitions. Word has length 15 [2022-03-01 17:28:43,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:43,366 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 564 transitions. [2022-03-01 17:28:43,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:43,366 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 564 transitions. [2022-03-01 17:28:43,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:43,367 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:43,367 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:43,383 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2022-03-01 17:28:43,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:43,567 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:43,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:43,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1756401527, now seen corresponding path program 104 times [2022-03-01 17:28:43,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:43,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593012786] [2022-03-01 17:28:43,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:43,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:43,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:43,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:43,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593012786] [2022-03-01 17:28:43,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593012786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:43,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988727813] [2022-03-01 17:28:43,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:43,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:43,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:43,662 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:43,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2022-03-01 17:28:43,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:43,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:43,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:43,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:43,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:43,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:28:43,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:43,838 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:28:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:43,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:43,965 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:43,966 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:28:43,968 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:43,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988727813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:43,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:43,993 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:28:43,993 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289131219] [2022-03-01 17:28:43,993 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:43,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:43,993 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:43,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:43,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:43,993 INFO L87 Difference]: Start difference. First operand 205 states and 564 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:44,358 INFO L93 Difference]: Finished difference Result 256 states and 633 transitions. [2022-03-01 17:28:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:28:44,359 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:44,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:44,359 INFO L225 Difference]: With dead ends: 256 [2022-03-01 17:28:44,359 INFO L226 Difference]: Without dead ends: 250 [2022-03-01 17:28:44,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:28:44,360 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:44,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 72 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-03-01 17:28:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 207. [2022-03-01 17:28:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.7427184466019416) internal successors, (565), 206 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:44,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 565 transitions. [2022-03-01 17:28:44,362 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 565 transitions. Word has length 15 [2022-03-01 17:28:44,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:44,362 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 565 transitions. [2022-03-01 17:28:44,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:44,362 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 565 transitions. [2022-03-01 17:28:44,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:44,363 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:44,363 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:44,379 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2022-03-01 17:28:44,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:44,563 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:44,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:44,564 INFO L85 PathProgramCache]: Analyzing trace with hash 441994741, now seen corresponding path program 105 times [2022-03-01 17:28:44,564 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:44,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457774074] [2022-03-01 17:28:44,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:44,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:44,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:44,651 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:44,651 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457774074] [2022-03-01 17:28:44,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457774074] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:44,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457372698] [2022-03-01 17:28:44,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:44,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:44,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:44,653 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:44,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2022-03-01 17:28:44,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:28:44,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:44,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:44,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:44,824 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:44,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:44,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:44,830 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:28:44,834 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:44,834 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:28:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:44,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:44,954 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:44,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:44,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:44,970 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457372698] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:44,970 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:44,970 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:44,970 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918014793] [2022-03-01 17:28:44,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:44,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:44,970 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:44,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:44,970 INFO L87 Difference]: Start difference. First operand 207 states and 565 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:45,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:45,597 INFO L93 Difference]: Finished difference Result 300 states and 720 transitions. [2022-03-01 17:28:45,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:28:45,597 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:45,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:45,598 INFO L225 Difference]: With dead ends: 300 [2022-03-01 17:28:45,598 INFO L226 Difference]: Without dead ends: 296 [2022-03-01 17:28:45,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:28:45,598 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:45,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 78 Invalid, 458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:45,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-01 17:28:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 210. [2022-03-01 17:28:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.7464114832535884) internal successors, (574), 209 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:45,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 574 transitions. [2022-03-01 17:28:45,601 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 574 transitions. Word has length 15 [2022-03-01 17:28:45,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:45,601 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 574 transitions. [2022-03-01 17:28:45,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:45,601 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 574 transitions. [2022-03-01 17:28:45,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:45,602 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:45,602 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:45,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2022-03-01 17:28:45,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2022-03-01 17:28:45,802 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:45,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:45,802 INFO L85 PathProgramCache]: Analyzing trace with hash -477705967, now seen corresponding path program 106 times [2022-03-01 17:28:45,802 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:45,802 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578051480] [2022-03-01 17:28:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:45,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:45,899 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:45,899 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578051480] [2022-03-01 17:28:45,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578051480] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:45,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115127638] [2022-03-01 17:28:45,900 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:45,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:45,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:45,905 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:45,907 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2022-03-01 17:28:45,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:45,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:45,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:45,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:46,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:46,075 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:28:46,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:46,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:28:46,113 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:46,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:46,197 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:46,197 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:28:46,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:46,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115127638] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:46,221 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:46,221 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:46,221 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532091003] [2022-03-01 17:28:46,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:46,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:46,221 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:46,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:46,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:46,222 INFO L87 Difference]: Start difference. First operand 210 states and 574 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:46,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:46,648 INFO L93 Difference]: Finished difference Result 259 states and 644 transitions. [2022-03-01 17:28:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:28:46,648 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:46,648 INFO L225 Difference]: With dead ends: 259 [2022-03-01 17:28:46,649 INFO L226 Difference]: Without dead ends: 253 [2022-03-01 17:28:46,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:28:46,649 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 50 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:46,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 64 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-01 17:28:46,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 211. [2022-03-01 17:28:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 2.7333333333333334) internal successors, (574), 210 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:46,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 574 transitions. [2022-03-01 17:28:46,652 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 574 transitions. Word has length 15 [2022-03-01 17:28:46,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:46,652 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 574 transitions. [2022-03-01 17:28:46,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 574 transitions. [2022-03-01 17:28:46,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:46,652 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:46,652 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:46,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2022-03-01 17:28:46,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:46,853 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:46,853 INFO L85 PathProgramCache]: Analyzing trace with hash 449725139, now seen corresponding path program 107 times [2022-03-01 17:28:46,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:46,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929538065] [2022-03-01 17:28:46,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:46,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:46,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:46,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:46,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929538065] [2022-03-01 17:28:46,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929538065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:46,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885503593] [2022-03-01 17:28:46,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:46,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:46,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:46,956 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:46,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2022-03-01 17:28:46,991 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:28:46,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:46,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:46,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:47,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:47,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:47,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:47,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:47,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:47,260 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:47,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:47,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:47,276 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885503593] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:47,276 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:47,276 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:47,276 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412779703] [2022-03-01 17:28:47,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:47,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:47,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:47,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:47,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:47,277 INFO L87 Difference]: Start difference. First operand 211 states and 574 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:47,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:47,822 INFO L93 Difference]: Finished difference Result 319 states and 728 transitions. [2022-03-01 17:28:47,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:28:47,822 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:47,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:47,823 INFO L225 Difference]: With dead ends: 319 [2022-03-01 17:28:47,823 INFO L226 Difference]: Without dead ends: 318 [2022-03-01 17:28:47,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:28:47,823 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 143 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:47,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 72 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-01 17:28:47,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 210. [2022-03-01 17:28:47,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 2.712918660287081) internal successors, (567), 209 states have internal predecessors, (567), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:47,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 567 transitions. [2022-03-01 17:28:47,826 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 567 transitions. Word has length 15 [2022-03-01 17:28:47,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:47,826 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 567 transitions. [2022-03-01 17:28:47,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:47,826 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 567 transitions. [2022-03-01 17:28:47,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:47,826 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:47,826 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:47,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2022-03-01 17:28:48,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:48,027 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:48,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:48,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1251341367, now seen corresponding path program 108 times [2022-03-01 17:28:48,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:48,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973459572] [2022-03-01 17:28:48,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:48,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:48,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:48,106 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:48,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973459572] [2022-03-01 17:28:48,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973459572] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:48,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321852897] [2022-03-01 17:28:48,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:48,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:48,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:48,108 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:48,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2022-03-01 17:28:48,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:28:48,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:48,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:48,235 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:48,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:48,238 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:48,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:48,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:48,304 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:48,385 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:48,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:28:48,387 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:48,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:48,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [321852897] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:48,406 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:48,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:48,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990565044] [2022-03-01 17:28:48,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:48,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:48,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:48,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:48,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:48,407 INFO L87 Difference]: Start difference. First operand 210 states and 567 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:48,782 INFO L93 Difference]: Finished difference Result 277 states and 663 transitions. [2022-03-01 17:28:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:28:48,783 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:48,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:48,783 INFO L225 Difference]: With dead ends: 277 [2022-03-01 17:28:48,783 INFO L226 Difference]: Without dead ends: 272 [2022-03-01 17:28:48,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:28:48,784 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 95 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:48,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 56 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:48,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-03-01 17:28:48,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 212. [2022-03-01 17:28:48,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 2.706161137440758) internal successors, (571), 211 states have internal predecessors, (571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:48,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 571 transitions. [2022-03-01 17:28:48,788 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 571 transitions. Word has length 15 [2022-03-01 17:28:48,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:48,788 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 571 transitions. [2022-03-01 17:28:48,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:48,788 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 571 transitions. [2022-03-01 17:28:48,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:48,788 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:48,788 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:48,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:49,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2022-03-01 17:28:49,010 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:49,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:49,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1325282223, now seen corresponding path program 109 times [2022-03-01 17:28:49,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:49,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796277374] [2022-03-01 17:28:49,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:49,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:49,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:49,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:49,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796277374] [2022-03-01 17:28:49,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796277374] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:49,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489193047] [2022-03-01 17:28:49,094 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:49,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:49,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:49,095 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:49,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2022-03-01 17:28:49,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:49,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:49,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:49,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:49,221 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:49,222 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:49,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:49,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:49,288 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:49,374 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:49,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:28:49,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:49,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489193047] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:49,395 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:49,395 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:49,396 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956919779] [2022-03-01 17:28:49,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:49,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:49,396 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:49,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:49,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:49,396 INFO L87 Difference]: Start difference. First operand 212 states and 571 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:49,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:49,656 INFO L93 Difference]: Finished difference Result 267 states and 654 transitions. [2022-03-01 17:28:49,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:49,656 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:49,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:49,656 INFO L225 Difference]: With dead ends: 267 [2022-03-01 17:28:49,656 INFO L226 Difference]: Without dead ends: 267 [2022-03-01 17:28:49,657 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:28:49,657 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:49,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 66 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 384 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:28:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-03-01 17:28:49,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 209. [2022-03-01 17:28:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.6923076923076925) internal successors, (560), 208 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 560 transitions. [2022-03-01 17:28:49,660 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 560 transitions. Word has length 15 [2022-03-01 17:28:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:49,660 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 560 transitions. [2022-03-01 17:28:49,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 560 transitions. [2022-03-01 17:28:49,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:49,660 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:49,660 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:49,676 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2022-03-01 17:28:49,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:49,861 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:49,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:49,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1164635591, now seen corresponding path program 110 times [2022-03-01 17:28:49,861 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:49,861 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844152049] [2022-03-01 17:28:49,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:49,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:28:49,945 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:49,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844152049] [2022-03-01 17:28:49,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844152049] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:49,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974765410] [2022-03-01 17:28:49,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:49,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:49,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:49,947 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:49,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2022-03-01 17:28:49,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:49,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:49,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:49,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:50,054 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:50,055 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:50,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:50,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:50,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:50,195 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:50,195 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:28:50,196 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:28:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:28:50,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974765410] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:50,213 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:50,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:28:50,214 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89056397] [2022-03-01 17:28:50,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:50,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:50,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:50,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:50,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:50,214 INFO L87 Difference]: Start difference. First operand 209 states and 560 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:50,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:50,539 INFO L93 Difference]: Finished difference Result 235 states and 608 transitions. [2022-03-01 17:28:50,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:28:50,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:50,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:50,540 INFO L225 Difference]: With dead ends: 235 [2022-03-01 17:28:50,540 INFO L226 Difference]: Without dead ends: 231 [2022-03-01 17:28:50,540 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:28:50,540 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:50,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 16 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:28:50,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-03-01 17:28:50,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 209. [2022-03-01 17:28:50,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.6826923076923075) internal successors, (558), 208 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:50,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 558 transitions. [2022-03-01 17:28:50,543 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 558 transitions. Word has length 15 [2022-03-01 17:28:50,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:50,543 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 558 transitions. [2022-03-01 17:28:50,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:50,543 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 558 transitions. [2022-03-01 17:28:50,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:50,543 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:50,543 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:50,559 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:50,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2022-03-01 17:28:50,744 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:50,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:50,744 INFO L85 PathProgramCache]: Analyzing trace with hash 33405523, now seen corresponding path program 111 times [2022-03-01 17:28:50,744 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:50,744 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706527967] [2022-03-01 17:28:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:50,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:50,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:50,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:50,828 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:50,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706527967] [2022-03-01 17:28:50,828 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706527967] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:50,828 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39282907] [2022-03-01 17:28:50,828 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:50,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:50,828 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:50,829 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:50,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2022-03-01 17:28:50,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:28:50,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:50,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:50,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:50,947 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:50,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:50,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:50,950 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:51,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:51,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:51,092 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:51,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:28:51,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:51,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:51,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39282907] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:51,116 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:51,116 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:28:51,116 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908686878] [2022-03-01 17:28:51,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:51,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:51,116 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:51,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:51,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:51,117 INFO L87 Difference]: Start difference. First operand 209 states and 558 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:51,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:51,344 INFO L93 Difference]: Finished difference Result 304 states and 719 transitions. [2022-03-01 17:28:51,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:51,345 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:51,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:51,345 INFO L225 Difference]: With dead ends: 304 [2022-03-01 17:28:51,345 INFO L226 Difference]: Without dead ends: 304 [2022-03-01 17:28:51,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:28:51,345 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 68 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:51,346 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 68 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:51,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-03-01 17:28:51,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 217. [2022-03-01 17:28:51,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.7175925925925926) internal successors, (587), 216 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:51,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 587 transitions. [2022-03-01 17:28:51,348 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 587 transitions. Word has length 15 [2022-03-01 17:28:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:51,348 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 587 transitions. [2022-03-01 17:28:51,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:51,349 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 587 transitions. [2022-03-01 17:28:51,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:51,349 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:51,349 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:51,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2022-03-01 17:28:51,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2022-03-01 17:28:51,549 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:51,550 INFO L85 PathProgramCache]: Analyzing trace with hash 835021751, now seen corresponding path program 112 times [2022-03-01 17:28:51,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:51,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811883023] [2022-03-01 17:28:51,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:51,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:51,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:51,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811883023] [2022-03-01 17:28:51,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811883023] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:51,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388634304] [2022-03-01 17:28:51,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:51,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:51,618 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:51,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2022-03-01 17:28:51,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:51,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:51,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:51,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:51,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:51,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:51,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:51,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:51,792 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:51,868 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:51,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:28:51,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:28:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:51,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388634304] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:51,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:51,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 16 [2022-03-01 17:28:51,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033555836] [2022-03-01 17:28:51,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:51,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:28:51,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:51,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:28:51,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:28:51,888 INFO L87 Difference]: Start difference. First operand 217 states and 587 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:52,363 INFO L93 Difference]: Finished difference Result 350 states and 801 transitions. [2022-03-01 17:28:52,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:28:52,363 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:52,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:52,364 INFO L225 Difference]: With dead ends: 350 [2022-03-01 17:28:52,364 INFO L226 Difference]: Without dead ends: 344 [2022-03-01 17:28:52,364 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=778, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:28:52,364 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:52,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 92 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-03-01 17:28:52,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 224. [2022-03-01 17:28:52,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.7309417040358746) internal successors, (609), 223 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:52,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 609 transitions. [2022-03-01 17:28:52,367 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 609 transitions. Word has length 15 [2022-03-01 17:28:52,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:52,367 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 609 transitions. [2022-03-01 17:28:52,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:52,368 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 609 transitions. [2022-03-01 17:28:52,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:52,368 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:52,368 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:52,384 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2022-03-01 17:28:52,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2022-03-01 17:28:52,568 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:52,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:52,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1741601839, now seen corresponding path program 113 times [2022-03-01 17:28:52,569 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:52,569 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066349817] [2022-03-01 17:28:52,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:52,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:52,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:52,635 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:52,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066349817] [2022-03-01 17:28:52,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066349817] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:52,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493057133] [2022-03-01 17:28:52,635 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:52,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:52,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:52,636 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:52,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2022-03-01 17:28:52,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:28:52,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:52,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:52,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:52,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:52,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:52,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:52,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:52,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:52,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:52,866 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:52,867 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:28:52,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:28:52,885 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:52,885 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493057133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:52,885 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:52,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:28:52,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99788929] [2022-03-01 17:28:52,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:52,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:52,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:52,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:52,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:52,886 INFO L87 Difference]: Start difference. First operand 224 states and 609 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:53,154 INFO L93 Difference]: Finished difference Result 312 states and 747 transitions. [2022-03-01 17:28:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:28:53,154 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:53,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:53,155 INFO L225 Difference]: With dead ends: 312 [2022-03-01 17:28:53,155 INFO L226 Difference]: Without dead ends: 312 [2022-03-01 17:28:53,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:28:53,155 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 410 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:53,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 76 Invalid, 410 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:53,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-01 17:28:53,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 218. [2022-03-01 17:28:53,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.7004608294930876) internal successors, (586), 217 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 586 transitions. [2022-03-01 17:28:53,158 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 586 transitions. Word has length 15 [2022-03-01 17:28:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:53,158 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 586 transitions. [2022-03-01 17:28:53,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 586 transitions. [2022-03-01 17:28:53,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:53,159 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:53,159 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:53,183 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:53,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:53,375 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:53,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:53,376 INFO L85 PathProgramCache]: Analyzing trace with hash 842752149, now seen corresponding path program 114 times [2022-03-01 17:28:53,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:53,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335148311] [2022-03-01 17:28:53,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:53,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:53,447 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:53,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:53,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335148311] [2022-03-01 17:28:53,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335148311] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:53,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618445420] [2022-03-01 17:28:53,448 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:53,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:53,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:53,449 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:53,473 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2022-03-01 17:28:53,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:28:53,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:53,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:53,598 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:53,601 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:53,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:53,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:53,726 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:53,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:28:53,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:28:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:53,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618445420] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:53,749 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:53,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:28:53,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337366341] [2022-03-01 17:28:53,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:53,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:53,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:53,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:53,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:53,755 INFO L87 Difference]: Start difference. First operand 218 states and 586 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:53,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:53,967 INFO L93 Difference]: Finished difference Result 292 states and 710 transitions. [2022-03-01 17:28:53,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:53,968 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:53,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:53,969 INFO L225 Difference]: With dead ends: 292 [2022-03-01 17:28:53,969 INFO L226 Difference]: Without dead ends: 292 [2022-03-01 17:28:53,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:53,969 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 36 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 40 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:53,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 78 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 357 Invalid, 0 Unknown, 40 Unchecked, 0.2s Time] [2022-03-01 17:28:53,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2022-03-01 17:28:53,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 219. [2022-03-01 17:28:53,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.7018348623853212) internal successors, (589), 218 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:53,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 589 transitions. [2022-03-01 17:28:53,973 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 589 transitions. Word has length 15 [2022-03-01 17:28:53,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:53,973 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 589 transitions. [2022-03-01 17:28:53,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:53,973 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 589 transitions. [2022-03-01 17:28:53,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:53,974 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:53,974 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:53,999 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:54,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2022-03-01 17:28:54,183 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:54,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:54,184 INFO L85 PathProgramCache]: Analyzing trace with hash -1844693961, now seen corresponding path program 115 times [2022-03-01 17:28:54,184 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:54,184 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444040065] [2022-03-01 17:28:54,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:54,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:54,248 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:54,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:54,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444040065] [2022-03-01 17:28:54,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444040065] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:54,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221458855] [2022-03-01 17:28:54,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:28:54,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:54,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:54,250 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:54,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2022-03-01 17:28:54,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:54,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:54,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:54,388 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:54,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:54,392 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:54,392 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:54,413 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:54,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:54,489 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:28:54,490 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:28:54,491 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:28:54,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:54,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221458855] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:54,508 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:54,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:28:54,508 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402147456] [2022-03-01 17:28:54,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:54,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:28:54,508 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:54,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:28:54,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:28:54,509 INFO L87 Difference]: Start difference. First operand 219 states and 589 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:54,697 INFO L93 Difference]: Finished difference Result 290 states and 704 transitions. [2022-03-01 17:28:54,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:28:54,697 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:54,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:54,698 INFO L225 Difference]: With dead ends: 290 [2022-03-01 17:28:54,698 INFO L226 Difference]: Without dead ends: 290 [2022-03-01 17:28:54,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:54,698 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 39 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 10 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:54,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 84 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 406 Invalid, 0 Unknown, 10 Unchecked, 0.2s Time] [2022-03-01 17:28:54,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-01 17:28:54,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 217. [2022-03-01 17:28:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 2.6944444444444446) internal successors, (582), 216 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:54,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 582 transitions. [2022-03-01 17:28:54,701 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 582 transitions. Word has length 15 [2022-03-01 17:28:54,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:54,701 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 582 transitions. [2022-03-01 17:28:54,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:54,701 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 582 transitions. [2022-03-01 17:28:54,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:54,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:54,702 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:54,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2022-03-01 17:28:54,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2022-03-01 17:28:54,902 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:54,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:54,902 INFO L85 PathProgramCache]: Analyzing trace with hash 12399315, now seen corresponding path program 116 times [2022-03-01 17:28:54,902 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:54,902 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922384057] [2022-03-01 17:28:54,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:54,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:54,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:54,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:54,983 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:54,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922384057] [2022-03-01 17:28:54,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922384057] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:54,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370157866] [2022-03-01 17:28:54,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:28:54,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:54,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:54,985 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:54,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2022-03-01 17:28:55,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:28:55,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:55,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:55,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:55,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:55,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:55,113 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:55,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:55,183 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:55,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:55,272 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:55,272 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:28:55,274 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:28:55,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:55,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370157866] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:55,293 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:55,293 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:55,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869559685] [2022-03-01 17:28:55,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:55,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:55,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:55,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:55,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:55,294 INFO L87 Difference]: Start difference. First operand 217 states and 582 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:55,584 INFO L93 Difference]: Finished difference Result 320 states and 762 transitions. [2022-03-01 17:28:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:28:55,584 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:55,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:55,585 INFO L225 Difference]: With dead ends: 320 [2022-03-01 17:28:55,585 INFO L226 Difference]: Without dead ends: 320 [2022-03-01 17:28:55,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:28:55,585 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:55,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 74 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 473 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:55,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-03-01 17:28:55,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 227. [2022-03-01 17:28:55,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.7389380530973453) internal successors, (619), 226 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:55,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 619 transitions. [2022-03-01 17:28:55,588 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 619 transitions. Word has length 15 [2022-03-01 17:28:55,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:55,588 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 619 transitions. [2022-03-01 17:28:55,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:55,588 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 619 transitions. [2022-03-01 17:28:55,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:55,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:55,589 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:55,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2022-03-01 17:28:55,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2022-03-01 17:28:55,789 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:55,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:55,789 INFO L85 PathProgramCache]: Analyzing trace with hash 814015543, now seen corresponding path program 117 times [2022-03-01 17:28:55,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:55,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881820861] [2022-03-01 17:28:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:55,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:55,862 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:55,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:55,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881820861] [2022-03-01 17:28:55,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881820861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:55,863 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586892155] [2022-03-01 17:28:55,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:28:55,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:55,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:55,864 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:55,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2022-03-01 17:28:55,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:28:55,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:55,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:55,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:55,989 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:55,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:55,991 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:55,991 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:56,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:56,148 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:56,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:56,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:56,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586892155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:56,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:56,165 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:56,165 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737371708] [2022-03-01 17:28:56,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:56,165 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:56,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:56,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:56,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:56,165 INFO L87 Difference]: Start difference. First operand 227 states and 619 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:56,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:56,876 INFO L93 Difference]: Finished difference Result 337 states and 794 transitions. [2022-03-01 17:28:56,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:28:56,877 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:56,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:56,877 INFO L225 Difference]: With dead ends: 337 [2022-03-01 17:28:56,877 INFO L226 Difference]: Without dead ends: 328 [2022-03-01 17:28:56,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:28:56,878 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 117 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:56,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 70 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-01 17:28:56,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 238. [2022-03-01 17:28:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.7552742616033754) internal successors, (653), 237 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 653 transitions. [2022-03-01 17:28:56,881 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 653 transitions. Word has length 15 [2022-03-01 17:28:56,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:56,881 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 653 transitions. [2022-03-01 17:28:56,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:56,881 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 653 transitions. [2022-03-01 17:28:56,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:56,881 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:56,881 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:56,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2022-03-01 17:28:57,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:57,082 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:57,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:57,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1762608047, now seen corresponding path program 118 times [2022-03-01 17:28:57,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:57,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715941115] [2022-03-01 17:28:57,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:57,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:57,157 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:57,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715941115] [2022-03-01 17:28:57,157 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715941115] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:57,157 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833645338] [2022-03-01 17:28:57,157 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:28:57,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:57,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:57,158 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:57,159 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2022-03-01 17:28:57,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:28:57,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:57,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:57,283 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:57,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:28:57,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:57,285 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:28:57,340 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:57,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:57,427 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:57,427 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:57,429 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:57,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:57,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833645338] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:57,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:57,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:57,443 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716220355] [2022-03-01 17:28:57,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:57,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:57,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:57,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:57,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:57,443 INFO L87 Difference]: Start difference. First operand 238 states and 653 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:57,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:57,971 INFO L93 Difference]: Finished difference Result 321 states and 774 transitions. [2022-03-01 17:28:57,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:28:57,971 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:57,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:57,971 INFO L225 Difference]: With dead ends: 321 [2022-03-01 17:28:57,972 INFO L226 Difference]: Without dead ends: 319 [2022-03-01 17:28:57,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:28:57,972 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:57,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 38 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:28:57,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-01 17:28:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 221. [2022-03-01 17:28:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6863636363636365) internal successors, (591), 220 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:57,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 591 transitions. [2022-03-01 17:28:57,975 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 591 transitions. Word has length 15 [2022-03-01 17:28:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:57,975 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 591 transitions. [2022-03-01 17:28:57,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 591 transitions. [2022-03-01 17:28:57,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:57,975 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:57,975 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:57,991 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2022-03-01 17:28:58,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:58,176 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:58,176 INFO L85 PathProgramCache]: Analyzing trace with hash 821745941, now seen corresponding path program 119 times [2022-03-01 17:28:58,176 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:58,176 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332087284] [2022-03-01 17:28:58,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:58,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:58,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:58,273 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:58,273 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:58,273 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332087284] [2022-03-01 17:28:58,273 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332087284] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:58,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482840679] [2022-03-01 17:28:58,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:28:58,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:58,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:58,284 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:58,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2022-03-01 17:28:58,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:28:58,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:58,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:58,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:58,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:58,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:58,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:58,507 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:58,507 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:58,624 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:58,624 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:58,626 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:58,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:58,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482840679] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:58,644 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:58,644 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:58,644 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217365740] [2022-03-01 17:28:58,644 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:58,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:58,645 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:58,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:58,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:58,645 INFO L87 Difference]: Start difference. First operand 221 states and 591 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:59,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:28:59,241 INFO L93 Difference]: Finished difference Result 290 states and 711 transitions. [2022-03-01 17:28:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:28:59,242 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:28:59,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:28:59,242 INFO L225 Difference]: With dead ends: 290 [2022-03-01 17:28:59,242 INFO L226 Difference]: Without dead ends: 290 [2022-03-01 17:28:59,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=986, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:28:59,243 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 51 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:28:59,243 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 36 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 298 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-03-01 17:28:59,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-03-01 17:28:59,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 228. [2022-03-01 17:28:59,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.6916299559471364) internal successors, (611), 227 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:59,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 611 transitions. [2022-03-01 17:28:59,246 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 611 transitions. Word has length 15 [2022-03-01 17:28:59,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:28:59,246 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 611 transitions. [2022-03-01 17:28:59,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:28:59,246 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 611 transitions. [2022-03-01 17:28:59,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:28:59,247 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:28:59,247 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:28:59,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Ended with exit code 0 [2022-03-01 17:28:59,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,124 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:59,451 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:28:59,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:28:59,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1865700169, now seen corresponding path program 120 times [2022-03-01 17:28:59,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:28:59,452 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625426715] [2022-03-01 17:28:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:28:59,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:28:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:28:59,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:59,548 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:28:59,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625426715] [2022-03-01 17:28:59,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625426715] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:28:59,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758551133] [2022-03-01 17:28:59,548 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:28:59,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:28:59,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:28:59,552 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:28:59,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2022-03-01 17:28:59,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:28:59,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:28:59,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:28:59,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:28:59,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:59,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:28:59,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:28:59,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:28:59,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:59,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:28:59,844 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:28:59,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:28:59,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:28:59,860 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:28:59,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758551133] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:28:59,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:28:59,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:28:59,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774648750] [2022-03-01 17:28:59,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:28:59,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:28:59,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:28:59,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:28:59,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:28:59,861 INFO L87 Difference]: Start difference. First operand 228 states and 611 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:00,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:00,514 INFO L93 Difference]: Finished difference Result 298 states and 721 transitions. [2022-03-01 17:29:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:29:00,514 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:00,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:00,515 INFO L225 Difference]: With dead ends: 298 [2022-03-01 17:29:00,515 INFO L226 Difference]: Without dead ends: 298 [2022-03-01 17:29:00,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=246, Invalid=1160, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:29:00,515 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:00,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 48 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 415 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-03-01 17:29:00,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-01 17:29:00,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 227. [2022-03-01 17:29:00,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.690265486725664) internal successors, (608), 226 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:00,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 608 transitions. [2022-03-01 17:29:00,518 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 608 transitions. Word has length 15 [2022-03-01 17:29:00,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:00,518 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 608 transitions. [2022-03-01 17:29:00,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:00,518 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 608 transitions. [2022-03-01 17:29:00,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:00,518 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:00,518 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:00,535 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2022-03-01 17:29:00,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2022-03-01 17:29:00,719 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:00,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:00,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1694997739, now seen corresponding path program 121 times [2022-03-01 17:29:00,719 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:00,719 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103753880] [2022-03-01 17:29:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:00,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:00,790 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:00,790 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:00,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103753880] [2022-03-01 17:29:00,790 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103753880] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:00,790 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098347488] [2022-03-01 17:29:00,791 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:00,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:00,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:00,792 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:00,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2022-03-01 17:29:00,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:00,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:00,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:00,962 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:00,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:00,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:00,986 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:00,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:01,087 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:01,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:01,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:01,103 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:01,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098347488] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:01,103 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:01,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:01,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726390627] [2022-03-01 17:29:01,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:01,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:01,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:01,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:01,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:01,104 INFO L87 Difference]: Start difference. First operand 227 states and 608 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:01,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:01,567 INFO L93 Difference]: Finished difference Result 278 states and 692 transitions. [2022-03-01 17:29:01,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:29:01,567 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:01,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:01,568 INFO L225 Difference]: With dead ends: 278 [2022-03-01 17:29:01,568 INFO L226 Difference]: Without dead ends: 278 [2022-03-01 17:29:01,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:29:01,568 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:01,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 46 Invalid, 491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 422 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-03-01 17:29:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-03-01 17:29:01,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 219. [2022-03-01 17:29:01,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.6788990825688073) internal successors, (584), 218 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:01,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 584 transitions. [2022-03-01 17:29:01,571 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 584 transitions. Word has length 15 [2022-03-01 17:29:01,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:01,571 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 584 transitions. [2022-03-01 17:29:01,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:01,571 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 584 transitions. [2022-03-01 17:29:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:01,571 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:01,571 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:01,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2022-03-01 17:29:01,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2022-03-01 17:29:01,772 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:01,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:01,772 INFO L85 PathProgramCache]: Analyzing trace with hash -667659055, now seen corresponding path program 122 times [2022-03-01 17:29:01,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:01,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994280385] [2022-03-01 17:29:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:01,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:01,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:01,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:01,854 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:01,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994280385] [2022-03-01 17:29:01,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994280385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:01,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927300292] [2022-03-01 17:29:01,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:01,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:01,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:01,856 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:01,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2022-03-01 17:29:01,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:01,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:01,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:01,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:01,997 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:01,997 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:02,000 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:02,000 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:02,023 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:02,023 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:02,100 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:02,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:02,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:02,117 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:02,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927300292] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:02,117 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:02,117 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:02,117 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655460677] [2022-03-01 17:29:02,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:02,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:02,117 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:02,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:02,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:02,117 INFO L87 Difference]: Start difference. First operand 219 states and 584 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:02,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:02,247 INFO L93 Difference]: Finished difference Result 258 states and 660 transitions. [2022-03-01 17:29:02,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:29:02,247 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:02,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:02,248 INFO L225 Difference]: With dead ends: 258 [2022-03-01 17:29:02,248 INFO L226 Difference]: Without dead ends: 258 [2022-03-01 17:29:02,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:29:02,248 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 25 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:02,248 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 38 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 236 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2022-03-01 17:29:02,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-03-01 17:29:02,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 223. [2022-03-01 17:29:02,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 2.684684684684685) internal successors, (596), 222 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 596 transitions. [2022-03-01 17:29:02,251 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 596 transitions. Word has length 15 [2022-03-01 17:29:02,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:02,251 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 596 transitions. [2022-03-01 17:29:02,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:02,251 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 596 transitions. [2022-03-01 17:29:02,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:02,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:02,252 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:02,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Ended with exit code 0 [2022-03-01 17:29:02,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2022-03-01 17:29:02,452 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:02,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:02,452 INFO L85 PathProgramCache]: Analyzing trace with hash 939862131, now seen corresponding path program 123 times [2022-03-01 17:29:02,452 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:02,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344456571] [2022-03-01 17:29:02,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:02,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:02,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:02,523 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:02,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344456571] [2022-03-01 17:29:02,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344456571] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:02,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126404505] [2022-03-01 17:29:02,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:02,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:02,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:02,525 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:02,528 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2022-03-01 17:29:02,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:29:02,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:02,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:02,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:02,679 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:02,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:02,682 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:02,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:02,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:02,703 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:02,784 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:02,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:02,786 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:02,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126404505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:02,800 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:02,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:02,801 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302740716] [2022-03-01 17:29:02,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:02,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:02,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:02,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:02,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:02,801 INFO L87 Difference]: Start difference. First operand 223 states and 596 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:02,975 INFO L93 Difference]: Finished difference Result 269 states and 681 transitions. [2022-03-01 17:29:02,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:29:02,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:02,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:02,976 INFO L225 Difference]: With dead ends: 269 [2022-03-01 17:29:02,976 INFO L226 Difference]: Without dead ends: 269 [2022-03-01 17:29:02,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:29:02,976 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 30 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:02,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 44 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 331 Invalid, 0 Unknown, 78 Unchecked, 0.1s Time] [2022-03-01 17:29:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-03-01 17:29:02,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 221. [2022-03-01 17:29:02,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.6818181818181817) internal successors, (590), 220 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 590 transitions. [2022-03-01 17:29:02,979 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 590 transitions. Word has length 15 [2022-03-01 17:29:02,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:02,979 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 590 transitions. [2022-03-01 17:29:02,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:02,979 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 590 transitions. [2022-03-01 17:29:02,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:02,979 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:02,979 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:02,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:03,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2022-03-01 17:29:03,180 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:03,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:03,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1626057831, now seen corresponding path program 124 times [2022-03-01 17:29:03,180 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:03,180 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089340153] [2022-03-01 17:29:03,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:03,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:03,257 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:03,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089340153] [2022-03-01 17:29:03,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089340153] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:03,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694667756] [2022-03-01 17:29:03,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:03,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:03,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:03,259 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:03,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2022-03-01 17:29:03,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:03,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:03,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:03,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:03,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:03,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:03,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:03,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:03,437 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:03,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:03,547 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:03,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:03,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:03,567 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:03,567 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694667756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:03,567 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:03,568 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:03,568 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176920001] [2022-03-01 17:29:03,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:03,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:03,568 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:03,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:03,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:03,568 INFO L87 Difference]: Start difference. First operand 221 states and 590 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:03,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:03,745 INFO L93 Difference]: Finished difference Result 268 states and 672 transitions. [2022-03-01 17:29:03,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:29:03,746 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:03,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:03,746 INFO L225 Difference]: With dead ends: 268 [2022-03-01 17:29:03,746 INFO L226 Difference]: Without dead ends: 268 [2022-03-01 17:29:03,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:29:03,746 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 332 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:03,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 46 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 332 Invalid, 0 Unknown, 96 Unchecked, 0.1s Time] [2022-03-01 17:29:03,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-03-01 17:29:03,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 220. [2022-03-01 17:29:03,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.680365296803653) internal successors, (587), 219 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:03,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 587 transitions. [2022-03-01 17:29:03,749 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 587 transitions. Word has length 15 [2022-03-01 17:29:03,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:03,749 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 587 transitions. [2022-03-01 17:29:03,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:03,749 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 587 transitions. [2022-03-01 17:29:03,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:03,750 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:03,750 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:03,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Ended with exit code 0 [2022-03-01 17:29:03,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2022-03-01 17:29:03,950 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:03,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1814621851, now seen corresponding path program 125 times [2022-03-01 17:29:03,950 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:03,951 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183157032] [2022-03-01 17:29:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:03,951 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:04,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:04,033 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:04,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183157032] [2022-03-01 17:29:04,033 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183157032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:04,033 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423922325] [2022-03-01 17:29:04,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:04,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:04,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:04,034 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:04,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2022-03-01 17:29:04,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:29:04,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:04,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:04,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:04,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:04,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:29:04,163 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:29:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:04,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:04,276 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:29:04,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:29:04,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:29:04,288 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:04,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423922325] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:04,288 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:04,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:29:04,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848888560] [2022-03-01 17:29:04,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:04,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:29:04,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:04,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:29:04,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:29:04,289 INFO L87 Difference]: Start difference. First operand 220 states and 587 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:04,510 INFO L93 Difference]: Finished difference Result 288 states and 748 transitions. [2022-03-01 17:29:04,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-01 17:29:04,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:04,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:04,511 INFO L225 Difference]: With dead ends: 288 [2022-03-01 17:29:04,511 INFO L226 Difference]: Without dead ends: 288 [2022-03-01 17:29:04,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:29:04,511 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:04,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 38 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:29:04,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-03-01 17:29:04,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 219. [2022-03-01 17:29:04,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.688073394495413) internal successors, (586), 218 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:04,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 586 transitions. [2022-03-01 17:29:04,514 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 586 transitions. Word has length 15 [2022-03-01 17:29:04,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:04,514 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 586 transitions. [2022-03-01 17:29:04,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 586 transitions. [2022-03-01 17:29:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:04,514 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:04,514 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:04,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Ended with exit code 0 [2022-03-01 17:29:04,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2022-03-01 17:29:04,715 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:04,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:04,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1256099443, now seen corresponding path program 126 times [2022-03-01 17:29:04,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:04,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840411142] [2022-03-01 17:29:04,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:04,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:04,792 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:04,793 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:04,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840411142] [2022-03-01 17:29:04,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840411142] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:04,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030657051] [2022-03-01 17:29:04,793 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:04,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:04,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:04,794 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:04,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2022-03-01 17:29:04,817 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:29:04,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:04,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:04,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:04,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:29:04,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:29:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:04,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:05,033 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:29:05,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:29:05,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:05,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:05,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030657051] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:05,049 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:05,049 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-03-01 17:29:05,049 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179718231] [2022-03-01 17:29:05,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:05,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-03-01 17:29:05,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:05,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-03-01 17:29:05,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-03-01 17:29:05,049 INFO L87 Difference]: Start difference. First operand 219 states and 586 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:05,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:05,322 INFO L93 Difference]: Finished difference Result 285 states and 738 transitions. [2022-03-01 17:29:05,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:29:05,323 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:05,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:05,323 INFO L225 Difference]: With dead ends: 285 [2022-03-01 17:29:05,323 INFO L226 Difference]: Without dead ends: 281 [2022-03-01 17:29:05,323 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:29:05,323 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:05,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 36 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:29:05,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-03-01 17:29:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 219. [2022-03-01 17:29:05,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 2.68348623853211) internal successors, (585), 218 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 585 transitions. [2022-03-01 17:29:05,327 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 585 transitions. Word has length 15 [2022-03-01 17:29:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:05,327 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 585 transitions. [2022-03-01 17:29:05,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:05,327 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 585 transitions. [2022-03-01 17:29:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:05,327 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:05,327 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:05,350 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Ended with exit code 0 [2022-03-01 17:29:05,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,131 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:05,550 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:05,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:05,550 INFO L85 PathProgramCache]: Analyzing trace with hash 237280121, now seen corresponding path program 127 times [2022-03-01 17:29:05,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:05,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424257258] [2022-03-01 17:29:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:05,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:05,634 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:05,634 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:05,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424257258] [2022-03-01 17:29:05,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424257258] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:05,635 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206847114] [2022-03-01 17:29:05,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:05,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:05,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:05,636 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:05,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2022-03-01 17:29:05,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:05,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:05,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:05,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:05,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:05,802 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:05,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:05,831 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:05,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:05,929 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:29:05,930 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:29:05,931 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:29:05,941 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:05,941 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206847114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:05,941 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:05,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:05,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754458860] [2022-03-01 17:29:05,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:05,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:05,942 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:05,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:05,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:05,942 INFO L87 Difference]: Start difference. First operand 219 states and 585 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:06,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:06,166 INFO L93 Difference]: Finished difference Result 303 states and 778 transitions. [2022-03-01 17:29:06,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:29:06,167 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:06,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:06,167 INFO L225 Difference]: With dead ends: 303 [2022-03-01 17:29:06,167 INFO L226 Difference]: Without dead ends: 303 [2022-03-01 17:29:06,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:29:06,168 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:06,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 34 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 268 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-03-01 17:29:06,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-01 17:29:06,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 222. [2022-03-01 17:29:06,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6877828054298645) internal successors, (594), 221 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:06,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 594 transitions. [2022-03-01 17:29:06,170 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 594 transitions. Word has length 15 [2022-03-01 17:29:06,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:06,170 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 594 transitions. [2022-03-01 17:29:06,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 594 transitions. [2022-03-01 17:29:06,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:06,171 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:06,171 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:06,187 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:06,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,132 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:06,372 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:06,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1966327455, now seen corresponding path program 128 times [2022-03-01 17:29:06,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:06,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840527289] [2022-03-01 17:29:06,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:06,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:06,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:06,446 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:06,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840527289] [2022-03-01 17:29:06,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840527289] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:06,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102203534] [2022-03-01 17:29:06,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:06,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:06,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:06,448 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:06,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2022-03-01 17:29:06,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:06,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:06,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:06,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:06,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:06,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:06,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:06,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:06,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:06,625 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:06,725 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:29:06,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:29:06,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:29:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:06,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102203534] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:06,737 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:06,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:06,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940884200] [2022-03-01 17:29:06,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:06,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:06,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:06,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:06,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:06,737 INFO L87 Difference]: Start difference. First operand 222 states and 594 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:06,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:06,943 INFO L93 Difference]: Finished difference Result 302 states and 779 transitions. [2022-03-01 17:29:06,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:29:06,944 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:06,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:06,944 INFO L225 Difference]: With dead ends: 302 [2022-03-01 17:29:06,944 INFO L226 Difference]: Without dead ends: 302 [2022-03-01 17:29:06,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:29:06,945 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 45 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:06,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 18 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 222 Invalid, 0 Unknown, 84 Unchecked, 0.1s Time] [2022-03-01 17:29:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-01 17:29:06,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 222. [2022-03-01 17:29:06,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.6877828054298645) internal successors, (594), 221 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:06,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 594 transitions. [2022-03-01 17:29:06,947 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 594 transitions. Word has length 15 [2022-03-01 17:29:06,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:06,948 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 594 transitions. [2022-03-01 17:29:06,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:06,948 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 594 transitions. [2022-03-01 17:29:06,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:06,948 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:06,948 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:06,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2022-03-01 17:29:07,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,133 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:07,149 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:07,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:07,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1791329245, now seen corresponding path program 129 times [2022-03-01 17:29:07,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:07,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017945257] [2022-03-01 17:29:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:07,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:07,228 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:07,228 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:07,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017945257] [2022-03-01 17:29:07,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017945257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:07,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312092126] [2022-03-01 17:29:07,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:07,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:07,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:07,229 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:07,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2022-03-01 17:29:07,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:29:07,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:07,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:07,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:07,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:07,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:29:07,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:07,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:29:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:07,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:07,532 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:29:07,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:29:07,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:07,548 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:07,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312092126] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:07,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:07,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:07,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106656881] [2022-03-01 17:29:07,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:07,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:07,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:07,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:07,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:07,549 INFO L87 Difference]: Start difference. First operand 222 states and 594 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:07,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:07,811 INFO L93 Difference]: Finished difference Result 290 states and 749 transitions. [2022-03-01 17:29:07,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:29:07,812 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:07,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:07,812 INFO L225 Difference]: With dead ends: 290 [2022-03-01 17:29:07,812 INFO L226 Difference]: Without dead ends: 287 [2022-03-01 17:29:07,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=493, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:07,813 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 62 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 273 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:07,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 34 Invalid, 327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 273 Invalid, 0 Unknown, 45 Unchecked, 0.1s Time] [2022-03-01 17:29:07,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-01 17:29:07,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 222. [2022-03-01 17:29:07,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.683257918552036) internal successors, (593), 221 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:07,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 593 transitions. [2022-03-01 17:29:07,817 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 593 transitions. Word has length 15 [2022-03-01 17:29:07,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:07,817 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 593 transitions. [2022-03-01 17:29:07,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:07,817 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 593 transitions. [2022-03-01 17:29:07,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:07,818 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:07,818 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:07,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Ended with exit code 0 [2022-03-01 17:29:08,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,134 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:08,039 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:08,040 INFO L85 PathProgramCache]: Analyzing trace with hash 476922459, now seen corresponding path program 130 times [2022-03-01 17:29:08,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:08,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98658393] [2022-03-01 17:29:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:08,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:08,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:08,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:08,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98658393] [2022-03-01 17:29:08,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98658393] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:08,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46688296] [2022-03-01 17:29:08,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:08,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:08,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:08,126 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:08,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2022-03-01 17:29:08,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:08,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:08,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:08,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:08,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:08,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:08,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:08,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:08,313 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:08,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:08,422 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:29:08,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:29:08,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:29:08,434 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:08,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46688296] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:08,434 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:08,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:08,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66230287] [2022-03-01 17:29:08,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:08,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:08,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:08,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:08,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:08,435 INFO L87 Difference]: Start difference. First operand 222 states and 593 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:08,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:08,994 INFO L93 Difference]: Finished difference Result 318 states and 810 transitions. [2022-03-01 17:29:08,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:29:08,995 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:08,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:08,995 INFO L225 Difference]: With dead ends: 318 [2022-03-01 17:29:08,995 INFO L226 Difference]: Without dead ends: 318 [2022-03-01 17:29:08,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=191, Invalid=739, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:29:08,996 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:08,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 22 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 431 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-03-01 17:29:08,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-03-01 17:29:09,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 225. [2022-03-01 17:29:09,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 2.6875) internal successors, (602), 224 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:09,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 602 transitions. [2022-03-01 17:29:09,002 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 602 transitions. Word has length 15 [2022-03-01 17:29:09,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:09,002 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 602 transitions. [2022-03-01 17:29:09,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:09,002 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 602 transitions. [2022-03-01 17:29:09,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:09,003 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:09,003 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:09,020 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:09,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,135 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:09,211 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:09,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:09,212 INFO L85 PathProgramCache]: Analyzing trace with hash -442778249, now seen corresponding path program 131 times [2022-03-01 17:29:09,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:09,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751434995] [2022-03-01 17:29:09,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:09,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:09,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:09,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:09,293 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:09,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751434995] [2022-03-01 17:29:09,293 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751434995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:09,293 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773854881] [2022-03-01 17:29:09,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:09,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:09,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:09,295 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:09,295 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2022-03-01 17:29:09,318 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:09,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:09,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:09,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:09,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:09,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:29:09,468 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:09,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:29:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:09,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:09,610 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:29:09,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:29:09,612 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:09,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:09,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773854881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:09,627 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:09,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:09,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067106798] [2022-03-01 17:29:09,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:09,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:09,627 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:09,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:09,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:09,627 INFO L87 Difference]: Start difference. First operand 225 states and 602 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:09,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:09,949 INFO L93 Difference]: Finished difference Result 298 states and 766 transitions. [2022-03-01 17:29:09,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:29:09,950 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:09,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:09,950 INFO L225 Difference]: With dead ends: 298 [2022-03-01 17:29:09,950 INFO L226 Difference]: Without dead ends: 296 [2022-03-01 17:29:09,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:29:09,951 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:09,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 42 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 429 Invalid, 0 Unknown, 11 Unchecked, 0.2s Time] [2022-03-01 17:29:09,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-03-01 17:29:09,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 227. [2022-03-01 17:29:09,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.685840707964602) internal successors, (607), 226 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:09,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 607 transitions. [2022-03-01 17:29:09,953 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 607 transitions. Word has length 15 [2022-03-01 17:29:09,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:09,954 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 607 transitions. [2022-03-01 17:29:09,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:09,954 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 607 transitions. [2022-03-01 17:29:09,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:09,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:09,954 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:09,971 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Ended with exit code 0 [2022-03-01 17:29:10,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,136 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:10,159 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:10,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:10,159 INFO L85 PathProgramCache]: Analyzing trace with hash 484652857, now seen corresponding path program 132 times [2022-03-01 17:29:10,159 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:10,160 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179867564] [2022-03-01 17:29:10,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:10,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:10,238 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:10,239 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:10,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179867564] [2022-03-01 17:29:10,239 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179867564] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:10,239 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890929516] [2022-03-01 17:29:10,239 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:10,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:10,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:10,240 INFO L229 MonitoredProcess]: Starting monitored process 137 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:10,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Waiting until timeout for monitored process [2022-03-01 17:29:10,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:29:10,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:10,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:10,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:10,376 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:10,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:10,378 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:10,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:10,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:10,558 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:29:10,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:29:10,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:29:10,570 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:10,570 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890929516] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:10,570 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:10,570 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:10,570 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116747445] [2022-03-01 17:29:10,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:10,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:10,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:10,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:10,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:10,570 INFO L87 Difference]: Start difference. First operand 227 states and 607 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:11,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:11,432 INFO L93 Difference]: Finished difference Result 408 states and 945 transitions. [2022-03-01 17:29:11,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:29:11,432 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:11,433 INFO L225 Difference]: With dead ends: 408 [2022-03-01 17:29:11,433 INFO L226 Difference]: Without dead ends: 408 [2022-03-01 17:29:11,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1161, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:29:11,434 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 106 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:11,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 74 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:29:11,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-03-01 17:29:11,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 229. [2022-03-01 17:29:11,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.7017543859649122) internal successors, (616), 228 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:11,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 616 transitions. [2022-03-01 17:29:11,438 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 616 transitions. Word has length 15 [2022-03-01 17:29:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:11,438 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 616 transitions. [2022-03-01 17:29:11,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:11,439 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 616 transitions. [2022-03-01 17:29:11,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:11,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:11,439 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:11,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (137)] Ended with exit code 0 [2022-03-01 17:29:11,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2022-03-01 17:29:11,654 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:11,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1286269085, now seen corresponding path program 133 times [2022-03-01 17:29:11,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:11,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701837887] [2022-03-01 17:29:11,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:11,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:11,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:11,759 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:11,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:11,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701837887] [2022-03-01 17:29:11,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701837887] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:11,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865212438] [2022-03-01 17:29:11,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:11,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:11,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:11,760 INFO L229 MonitoredProcess]: Starting monitored process 138 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:11,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Waiting until timeout for monitored process [2022-03-01 17:29:11,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:11,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:11,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:11,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:11,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:11,888 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:11,888 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:11,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:11,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:12,059 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:29:12,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:29:12,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:12,075 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865212438] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:12,075 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:12,075 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:12,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985587037] [2022-03-01 17:29:12,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:12,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:12,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:12,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:12,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:12,081 INFO L87 Difference]: Start difference. First operand 229 states and 616 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:12,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:12,611 INFO L93 Difference]: Finished difference Result 330 states and 820 transitions. [2022-03-01 17:29:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:29:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:12,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:12,612 INFO L225 Difference]: With dead ends: 330 [2022-03-01 17:29:12,612 INFO L226 Difference]: Without dead ends: 327 [2022-03-01 17:29:12,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:29:12,612 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 100 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:12,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 54 Invalid, 601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-01 17:29:12,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 231. [2022-03-01 17:29:12,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.7043478260869565) internal successors, (622), 230 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:12,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 622 transitions. [2022-03-01 17:29:12,615 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 622 transitions. Word has length 15 [2022-03-01 17:29:12,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:12,615 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 622 transitions. [2022-03-01 17:29:12,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:12,615 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 622 transitions. [2022-03-01 17:29:12,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:12,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:12,616 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:12,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (138)] Ended with exit code 0 [2022-03-01 17:29:12,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2022-03-01 17:29:12,816 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1290354505, now seen corresponding path program 134 times [2022-03-01 17:29:12,816 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:12,816 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090756617] [2022-03-01 17:29:12,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:12,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:12,924 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:12,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:12,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090756617] [2022-03-01 17:29:12,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090756617] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:12,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204218645] [2022-03-01 17:29:12,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:12,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:12,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:12,928 INFO L229 MonitoredProcess]: Starting monitored process 139 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:12,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Waiting until timeout for monitored process [2022-03-01 17:29:12,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:12,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:12,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:12,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:13,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:13,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:13,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:13,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:13,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:13,295 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:29:13,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:29:13,298 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:13,315 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:13,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204218645] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:13,315 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:13,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:13,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366963330] [2022-03-01 17:29:13,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:13,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:13,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:13,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:13,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:13,316 INFO L87 Difference]: Start difference. First operand 231 states and 622 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:13,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:13,640 INFO L93 Difference]: Finished difference Result 319 states and 804 transitions. [2022-03-01 17:29:13,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:29:13,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:13,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:13,641 INFO L225 Difference]: With dead ends: 319 [2022-03-01 17:29:13,641 INFO L226 Difference]: Without dead ends: 319 [2022-03-01 17:29:13,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:29:13,641 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 81 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:13,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 74 Invalid, 468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:13,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-03-01 17:29:13,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 228. [2022-03-01 17:29:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 227 states have (on average 2.6916299559471364) internal successors, (611), 227 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:13,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 611 transitions. [2022-03-01 17:29:13,644 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 611 transitions. Word has length 15 [2022-03-01 17:29:13,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:13,644 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 611 transitions. [2022-03-01 17:29:13,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 611 transitions. [2022-03-01 17:29:13,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:13,645 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:13,645 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:13,661 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (139)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:13,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2022-03-01 17:29:13,846 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:13,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:13,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1950903055, now seen corresponding path program 135 times [2022-03-01 17:29:13,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:13,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654162078] [2022-03-01 17:29:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:13,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:13,936 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:13,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654162078] [2022-03-01 17:29:13,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654162078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:13,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679502551] [2022-03-01 17:29:13,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:13,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:13,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:13,939 INFO L229 MonitoredProcess]: Starting monitored process 140 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:13,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Waiting until timeout for monitored process [2022-03-01 17:29:13,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:29:13,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:13,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:13,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:14,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:14,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:14,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:14,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:14,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:14,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:14,185 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:14,185 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:14,186 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:14,201 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:14,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679502551] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:14,201 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:14,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:29:14,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090464560] [2022-03-01 17:29:14,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:14,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:14,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:14,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:14,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:14,201 INFO L87 Difference]: Start difference. First operand 228 states and 611 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:14,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:14,348 INFO L93 Difference]: Finished difference Result 275 states and 705 transitions. [2022-03-01 17:29:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:29:14,348 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:14,349 INFO L225 Difference]: With dead ends: 275 [2022-03-01 17:29:14,349 INFO L226 Difference]: Without dead ends: 275 [2022-03-01 17:29:14,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:14,349 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:14,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 285 Invalid, 0 Unknown, 88 Unchecked, 0.1s Time] [2022-03-01 17:29:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-03-01 17:29:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 231. [2022-03-01 17:29:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.6956521739130435) internal successors, (620), 230 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 620 transitions. [2022-03-01 17:29:14,352 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 620 transitions. Word has length 15 [2022-03-01 17:29:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:14,352 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 620 transitions. [2022-03-01 17:29:14,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 620 transitions. [2022-03-01 17:29:14,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:14,352 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:14,353 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:14,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (140)] Ended with exit code 0 [2022-03-01 17:29:14,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2022-03-01 17:29:14,553 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:14,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:14,553 INFO L85 PathProgramCache]: Analyzing trace with hash -396853931, now seen corresponding path program 136 times [2022-03-01 17:29:14,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:14,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401490000] [2022-03-01 17:29:14,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:14,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:14,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:14,626 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:14,627 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:14,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401490000] [2022-03-01 17:29:14,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401490000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:14,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549048756] [2022-03-01 17:29:14,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:14,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:14,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:14,628 INFO L229 MonitoredProcess]: Starting monitored process 141 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:14,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Waiting until timeout for monitored process [2022-03-01 17:29:14,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:14,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:14,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:14,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:14,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:29:14,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:14,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:29:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:14,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:14,900 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:14,901 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:29:14,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:14,921 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:14,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549048756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:14,922 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:14,922 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:29:14,922 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221815279] [2022-03-01 17:29:14,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:14,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:14,922 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:14,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:14,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:14,922 INFO L87 Difference]: Start difference. First operand 231 states and 620 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:15,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:15,087 INFO L93 Difference]: Finished difference Result 256 states and 666 transitions. [2022-03-01 17:29:15,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:29:15,088 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:15,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:15,088 INFO L225 Difference]: With dead ends: 256 [2022-03-01 17:29:15,088 INFO L226 Difference]: Without dead ends: 253 [2022-03-01 17:29:15,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:29:15,089 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:15,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 265 Invalid, 0 Unknown, 80 Unchecked, 0.1s Time] [2022-03-01 17:29:15,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-03-01 17:29:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 232. [2022-03-01 17:29:15,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 2.683982683982684) internal successors, (620), 231 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:15,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 620 transitions. [2022-03-01 17:29:15,091 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 620 transitions. Word has length 15 [2022-03-01 17:29:15,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:15,091 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 620 transitions. [2022-03-01 17:29:15,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:15,091 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 620 transitions. [2022-03-01 17:29:15,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:15,092 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:15,092 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:15,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (141)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:15,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,141 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:15,292 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:15,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:15,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1711260717, now seen corresponding path program 137 times [2022-03-01 17:29:15,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:15,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908472171] [2022-03-01 17:29:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:15,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:15,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:15,367 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:15,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908472171] [2022-03-01 17:29:15,367 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908472171] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:15,367 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143649989] [2022-03-01 17:29:15,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:15,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:15,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:15,368 INFO L229 MonitoredProcess]: Starting monitored process 142 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:15,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Waiting until timeout for monitored process [2022-03-01 17:29:15,391 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:29:15,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:15,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:15,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:15,517 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:15,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:15,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:15,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:15,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:15,543 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:15,636 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:15,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:15,638 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:15,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:15,653 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143649989] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:15,653 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:15,653 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:15,653 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546062330] [2022-03-01 17:29:15,653 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:15,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:15,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:15,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:15,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:15,653 INFO L87 Difference]: Start difference. First operand 232 states and 620 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:15,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:15,980 INFO L93 Difference]: Finished difference Result 279 states and 716 transitions. [2022-03-01 17:29:15,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:29:15,980 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:15,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:15,981 INFO L225 Difference]: With dead ends: 279 [2022-03-01 17:29:15,981 INFO L226 Difference]: Without dead ends: 279 [2022-03-01 17:29:15,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:29:15,982 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 19 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:15,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 24 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 316 Invalid, 0 Unknown, 56 Unchecked, 0.1s Time] [2022-03-01 17:29:15,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2022-03-01 17:29:15,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 234. [2022-03-01 17:29:15,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.6952789699570814) internal successors, (628), 233 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:15,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 628 transitions. [2022-03-01 17:29:15,986 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 628 transitions. Word has length 15 [2022-03-01 17:29:15,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:15,986 INFO L470 AbstractCegarLoop]: Abstraction has 234 states and 628 transitions. [2022-03-01 17:29:15,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:15,986 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 628 transitions. [2022-03-01 17:29:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:15,986 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:15,987 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:16,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (142)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:16,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,142 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:16,209 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:16,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:16,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1664005871, now seen corresponding path program 138 times [2022-03-01 17:29:16,209 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:16,209 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637311607] [2022-03-01 17:29:16,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:16,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:16,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:16,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:16,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637311607] [2022-03-01 17:29:16,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637311607] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:16,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212244356] [2022-03-01 17:29:16,286 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:16,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:16,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:16,287 INFO L229 MonitoredProcess]: Starting monitored process 143 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:16,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Waiting until timeout for monitored process [2022-03-01 17:29:16,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-03-01 17:29:16,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:16,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:16,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:16,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:16,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:29:16,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:16,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:29:16,486 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:16,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:16,570 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:16,570 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:29:16,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:16,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:16,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [212244356] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:16,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:16,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:16,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895212824] [2022-03-01 17:29:16,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:16,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:16,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:16,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:16,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:16,592 INFO L87 Difference]: Start difference. First operand 234 states and 628 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:16,763 INFO L93 Difference]: Finished difference Result 259 states and 675 transitions. [2022-03-01 17:29:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:29:16,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:16,764 INFO L225 Difference]: With dead ends: 259 [2022-03-01 17:29:16,764 INFO L226 Difference]: Without dead ends: 257 [2022-03-01 17:29:16,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:29:16,764 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:16,764 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 18 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 298 Invalid, 0 Unknown, 9 Unchecked, 0.1s Time] [2022-03-01 17:29:16,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-03-01 17:29:16,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 235. [2022-03-01 17:29:16,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 2.6923076923076925) internal successors, (630), 234 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:16,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 630 transitions. [2022-03-01 17:29:16,767 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 630 transitions. Word has length 15 [2022-03-01 17:29:16,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:16,767 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 630 transitions. [2022-03-01 17:29:16,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:16,767 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 630 transitions. [2022-03-01 17:29:16,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:16,767 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:16,767 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:16,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (143)] Ended with exit code 0 [2022-03-01 17:29:16,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,143 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:16,968 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:16,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1703530319, now seen corresponding path program 139 times [2022-03-01 17:29:16,968 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:16,968 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303375376] [2022-03-01 17:29:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:16,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:16,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:17,058 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:17,058 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:17,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303375376] [2022-03-01 17:29:17,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303375376] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:17,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703879808] [2022-03-01 17:29:17,058 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:17,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:17,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:17,060 INFO L229 MonitoredProcess]: Starting monitored process 144 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:17,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Waiting until timeout for monitored process [2022-03-01 17:29:17,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:17,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:17,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:17,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:17,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:17,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:17,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:17,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:17,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:17,321 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:17,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:17,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:17,337 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:17,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703879808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:17,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:17,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:17,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27557010] [2022-03-01 17:29:17,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:17,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:17,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:17,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:17,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:17,338 INFO L87 Difference]: Start difference. First operand 235 states and 630 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:17,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:17,976 INFO L93 Difference]: Finished difference Result 372 states and 856 transitions. [2022-03-01 17:29:17,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:29:17,977 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:17,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:17,977 INFO L225 Difference]: With dead ends: 372 [2022-03-01 17:29:17,977 INFO L226 Difference]: Without dead ends: 372 [2022-03-01 17:29:17,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:29:17,978 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:17,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 80 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:29:17,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-03-01 17:29:17,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 233. [2022-03-01 17:29:17,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.6939655172413794) internal successors, (625), 232 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:17,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 625 transitions. [2022-03-01 17:29:17,981 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 625 transitions. Word has length 15 [2022-03-01 17:29:17,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:17,981 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 625 transitions. [2022-03-01 17:29:17,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:17,981 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 625 transitions. [2022-03-01 17:29:17,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:17,981 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:17,981 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:17,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (144)] Ended with exit code 0 [2022-03-01 17:29:18,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,144 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:18,182 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:18,182 INFO L85 PathProgramCache]: Analyzing trace with hash -901914091, now seen corresponding path program 140 times [2022-03-01 17:29:18,182 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:18,182 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628240786] [2022-03-01 17:29:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:18,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:18,261 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:18,261 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:18,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628240786] [2022-03-01 17:29:18,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628240786] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:18,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851973863] [2022-03-01 17:29:18,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:18,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:18,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:18,262 INFO L229 MonitoredProcess]: Starting monitored process 145 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:18,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Waiting until timeout for monitored process [2022-03-01 17:29:18,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:18,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:18,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:18,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:18,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:18,379 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:18,381 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:18,381 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:18,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:18,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:18,536 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:18,536 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:29:18,538 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:18,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851973863] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:18,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:18,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:18,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398210024] [2022-03-01 17:29:18,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:18,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:18,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:18,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:18,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:18,557 INFO L87 Difference]: Start difference. First operand 233 states and 625 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:18,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:18,839 INFO L93 Difference]: Finished difference Result 289 states and 720 transitions. [2022-03-01 17:29:18,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:29:18,839 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:18,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:18,839 INFO L225 Difference]: With dead ends: 289 [2022-03-01 17:29:18,839 INFO L226 Difference]: Without dead ends: 286 [2022-03-01 17:29:18,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:18,840 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 73 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:18,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 28 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:29:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2022-03-01 17:29:18,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 237. [2022-03-01 17:29:18,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.7033898305084745) internal successors, (638), 236 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:18,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 638 transitions. [2022-03-01 17:29:18,843 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 638 transitions. Word has length 15 [2022-03-01 17:29:18,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:18,843 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 638 transitions. [2022-03-01 17:29:18,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:18,843 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 638 transitions. [2022-03-01 17:29:18,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:18,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:18,843 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:18,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (145)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:19,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,145 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:19,044 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:19,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash 816429615, now seen corresponding path program 141 times [2022-03-01 17:29:19,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:19,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834860000] [2022-03-01 17:29:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:19,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:19,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:19,123 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:19,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834860000] [2022-03-01 17:29:19,123 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834860000] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:19,123 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425502828] [2022-03-01 17:29:19,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:19,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:19,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:19,124 INFO L229 MonitoredProcess]: Starting monitored process 146 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:19,124 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Waiting until timeout for monitored process [2022-03-01 17:29:19,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:29:19,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:19,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:19,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:19,237 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:19,238 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:19,239 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:19,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:19,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:19,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:19,401 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:19,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:29:19,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:19,422 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:19,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425502828] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:19,422 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:19,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:19,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121763727] [2022-03-01 17:29:19,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:19,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:19,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:19,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:19,423 INFO L87 Difference]: Start difference. First operand 237 states and 638 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:19,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:19,633 INFO L93 Difference]: Finished difference Result 287 states and 718 transitions. [2022-03-01 17:29:19,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:29:19,634 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:19,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:19,634 INFO L225 Difference]: With dead ends: 287 [2022-03-01 17:29:19,634 INFO L226 Difference]: Without dead ends: 287 [2022-03-01 17:29:19,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:29:19,634 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 52 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:19,634 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 68 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:29:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-03-01 17:29:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 233. [2022-03-01 17:29:19,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.689655172413793) internal successors, (624), 232 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:19,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 624 transitions. [2022-03-01 17:29:19,637 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 624 transitions. Word has length 15 [2022-03-01 17:29:19,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:19,637 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 624 transitions. [2022-03-01 17:29:19,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:19,637 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 624 transitions. [2022-03-01 17:29:19,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:19,641 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:19,641 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:19,657 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (146)] Ended with exit code 0 [2022-03-01 17:29:19,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,146 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:19,842 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:19,842 INFO L85 PathProgramCache]: Analyzing trace with hash -638175337, now seen corresponding path program 142 times [2022-03-01 17:29:19,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:19,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849443296] [2022-03-01 17:29:19,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:19,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:19,926 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:19,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849443296] [2022-03-01 17:29:19,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849443296] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:19,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456744473] [2022-03-01 17:29:19,926 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:19,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:19,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:19,928 INFO L229 MonitoredProcess]: Starting monitored process 147 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:19,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Waiting until timeout for monitored process [2022-03-01 17:29:19,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:19,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:19,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:19,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:20,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:20,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:20,098 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:20,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:20,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:20,215 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:20,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:29:20,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:29:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:20,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456744473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:20,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:20,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:29:20,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327995192] [2022-03-01 17:29:20,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:20,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:20,238 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:20,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:20,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:20,238 INFO L87 Difference]: Start difference. First operand 233 states and 624 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:20,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:20,499 INFO L93 Difference]: Finished difference Result 298 states and 740 transitions. [2022-03-01 17:29:20,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:29:20,500 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:20,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:20,500 INFO L225 Difference]: With dead ends: 298 [2022-03-01 17:29:20,500 INFO L226 Difference]: Without dead ends: 298 [2022-03-01 17:29:20,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:29:20,501 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:20,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 54 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 518 Invalid, 0 Unknown, 57 Unchecked, 0.2s Time] [2022-03-01 17:29:20,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-03-01 17:29:20,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 231. [2022-03-01 17:29:20,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.6913043478260867) internal successors, (619), 230 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:20,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 619 transitions. [2022-03-01 17:29:20,503 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 619 transitions. Word has length 15 [2022-03-01 17:29:20,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:20,504 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 619 transitions. [2022-03-01 17:29:20,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:20,504 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 619 transitions. [2022-03-01 17:29:20,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:20,504 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:20,504 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:20,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (147)] Ended with exit code 0 [2022-03-01 17:29:20,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2022-03-01 17:29:20,705 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:20,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:20,705 INFO L85 PathProgramCache]: Analyzing trace with hash -1557876045, now seen corresponding path program 143 times [2022-03-01 17:29:20,705 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:20,705 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396161511] [2022-03-01 17:29:20,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:20,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:20,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:20,776 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:20,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396161511] [2022-03-01 17:29:20,776 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396161511] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:20,776 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197644883] [2022-03-01 17:29:20,776 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:20,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:20,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:20,777 INFO L229 MonitoredProcess]: Starting monitored process 148 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:20,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Waiting until timeout for monitored process [2022-03-01 17:29:20,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:20,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:20,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:20,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:20,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:20,926 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:29:20,927 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:20,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:29:20,971 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:20,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:21,037 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:21,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:29:21,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:21,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:21,065 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197644883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:21,065 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:21,065 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:29:21,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093671226] [2022-03-01 17:29:21,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:21,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:21,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:21,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:21,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:21,066 INFO L87 Difference]: Start difference. First operand 231 states and 619 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:21,396 INFO L93 Difference]: Finished difference Result 264 states and 675 transitions. [2022-03-01 17:29:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:29:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:21,397 INFO L225 Difference]: With dead ends: 264 [2022-03-01 17:29:21,397 INFO L226 Difference]: Without dead ends: 260 [2022-03-01 17:29:21,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:29:21,397 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:21,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 22 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 411 Invalid, 0 Unknown, 54 Unchecked, 0.2s Time] [2022-03-01 17:29:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-03-01 17:29:21,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 231. [2022-03-01 17:29:21,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.6782608695652175) internal successors, (616), 230 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:21,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 616 transitions. [2022-03-01 17:29:21,400 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 616 transitions. Word has length 15 [2022-03-01 17:29:21,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:21,400 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 616 transitions. [2022-03-01 17:29:21,400 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:21,400 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 616 transitions. [2022-03-01 17:29:21,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:21,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:21,401 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:21,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (148)] Ended with exit code 0 [2022-03-01 17:29:21,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 148 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2022-03-01 17:29:21,601 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:21,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:21,601 INFO L85 PathProgramCache]: Analyzing trace with hash 977076247, now seen corresponding path program 144 times [2022-03-01 17:29:21,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:21,602 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797802986] [2022-03-01 17:29:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:21,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:21,674 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:21,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797802986] [2022-03-01 17:29:21,674 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797802986] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:21,674 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503990765] [2022-03-01 17:29:21,674 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:21,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:21,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:21,675 INFO L229 MonitoredProcess]: Starting monitored process 149 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:21,676 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Waiting until timeout for monitored process [2022-03-01 17:29:21,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:29:21,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:21,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:21,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:21,774 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:21,775 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:21,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:21,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:21,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:21,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:21,910 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:21,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:29:21,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:29:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:21,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503990765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:21,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:21,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:29:21,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309259436] [2022-03-01 17:29:21,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:21,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:21,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:21,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:21,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:21,928 INFO L87 Difference]: Start difference. First operand 231 states and 616 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:22,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:22,334 INFO L93 Difference]: Finished difference Result 289 states and 708 transitions. [2022-03-01 17:29:22,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:29:22,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:22,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:22,335 INFO L225 Difference]: With dead ends: 289 [2022-03-01 17:29:22,335 INFO L226 Difference]: Without dead ends: 285 [2022-03-01 17:29:22,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:29:22,335 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 70 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:22,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 34 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:29:22,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-03-01 17:29:22,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 231. [2022-03-01 17:29:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 2.6652173913043478) internal successors, (613), 230 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:22,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 613 transitions. [2022-03-01 17:29:22,338 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 613 transitions. Word has length 15 [2022-03-01 17:29:22,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:22,338 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 613 transitions. [2022-03-01 17:29:22,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:22,338 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 613 transitions. [2022-03-01 17:29:22,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:22,339 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:22,339 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:22,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (149)] Ended with exit code 0 [2022-03-01 17:29:22,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2022-03-01 17:29:22,539 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:22,539 INFO L85 PathProgramCache]: Analyzing trace with hash -2119849935, now seen corresponding path program 145 times [2022-03-01 17:29:22,539 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:22,539 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521136995] [2022-03-01 17:29:22,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:22,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:22,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:22,611 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:22,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521136995] [2022-03-01 17:29:22,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521136995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:22,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610414826] [2022-03-01 17:29:22,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:22,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:22,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:22,612 INFO L229 MonitoredProcess]: Starting monitored process 150 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:22,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Waiting until timeout for monitored process [2022-03-01 17:29:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:22,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:22,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:22,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:22,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:22,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:22,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:22,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:22,843 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:22,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:29:22,845 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:22,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:22,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610414826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:22,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:22,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:29:22,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291937206] [2022-03-01 17:29:22,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:22,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:22,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:22,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:22,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:22,866 INFO L87 Difference]: Start difference. First operand 231 states and 613 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:23,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:23,186 INFO L93 Difference]: Finished difference Result 347 states and 827 transitions. [2022-03-01 17:29:23,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:29:23,186 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:23,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:23,187 INFO L225 Difference]: With dead ends: 347 [2022-03-01 17:29:23,187 INFO L226 Difference]: Without dead ends: 347 [2022-03-01 17:29:23,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=406, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:29:23,187 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 81 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:23,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 70 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:23,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-01 17:29:23,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 245. [2022-03-01 17:29:23,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.721311475409836) internal successors, (664), 244 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 664 transitions. [2022-03-01 17:29:23,190 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 664 transitions. Word has length 15 [2022-03-01 17:29:23,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:23,191 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 664 transitions. [2022-03-01 17:29:23,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:23,191 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 664 transitions. [2022-03-01 17:29:23,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:23,191 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:23,191 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:23,207 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (150)] Ended with exit code 0 [2022-03-01 17:29:23,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2022-03-01 17:29:23,391 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:23,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1318233707, now seen corresponding path program 146 times [2022-03-01 17:29:23,392 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:23,392 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856906440] [2022-03-01 17:29:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:23,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:23,461 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:23,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856906440] [2022-03-01 17:29:23,461 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856906440] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:23,461 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359910986] [2022-03-01 17:29:23,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:23,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:23,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:23,462 INFO L229 MonitoredProcess]: Starting monitored process 151 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:23,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Waiting until timeout for monitored process [2022-03-01 17:29:23,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:23,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:23,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:23,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:23,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:23,580 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:23,582 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:23,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:23,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:23,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:23,726 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:23,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:29:23,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:29:23,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:23,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359910986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:23,744 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:23,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:29:23,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256462201] [2022-03-01 17:29:23,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:23,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:23,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:23,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:23,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:23,744 INFO L87 Difference]: Start difference. First operand 245 states and 664 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:24,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:24,316 INFO L93 Difference]: Finished difference Result 370 states and 868 transitions. [2022-03-01 17:29:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:29:24,317 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:24,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:24,317 INFO L225 Difference]: With dead ends: 370 [2022-03-01 17:29:24,317 INFO L226 Difference]: Without dead ends: 364 [2022-03-01 17:29:24,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:29:24,318 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 93 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:24,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 90 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 713 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:29:24,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-03-01 17:29:24,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 252. [2022-03-01 17:29:24,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.7250996015936253) internal successors, (684), 251 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 684 transitions. [2022-03-01 17:29:24,322 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 684 transitions. Word has length 15 [2022-03-01 17:29:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:24,322 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 684 transitions. [2022-03-01 17:29:24,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 684 transitions. [2022-03-01 17:29:24,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:24,323 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:24,323 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:24,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (151)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:24,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,151 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:24,539 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:24,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:24,540 INFO L85 PathProgramCache]: Analyzing trace with hash 400109999, now seen corresponding path program 147 times [2022-03-01 17:29:24,540 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:24,540 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113120731] [2022-03-01 17:29:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:24,540 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:24,617 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:24,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:24,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113120731] [2022-03-01 17:29:24,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113120731] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:24,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765456321] [2022-03-01 17:29:24,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:24,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:24,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:24,618 INFO L229 MonitoredProcess]: Starting monitored process 152 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:24,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Waiting until timeout for monitored process [2022-03-01 17:29:24,647 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:29:24,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:24,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:24,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:24,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:24,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:24,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:24,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:24,786 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:24,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:24,853 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:24,853 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:29:24,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:29:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:24,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765456321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:24,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:24,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:29:24,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920304548] [2022-03-01 17:29:24,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:24,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:24,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:24,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:24,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:24,873 INFO L87 Difference]: Start difference. First operand 252 states and 684 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:25,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:25,219 INFO L93 Difference]: Finished difference Result 351 states and 839 transitions. [2022-03-01 17:29:25,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:29:25,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:25,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:25,220 INFO L225 Difference]: With dead ends: 351 [2022-03-01 17:29:25,220 INFO L226 Difference]: Without dead ends: 351 [2022-03-01 17:29:25,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:25,220 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 72 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:25,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 86 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:25,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-01 17:29:25,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 246. [2022-03-01 17:29:25,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.6979591836734693) internal successors, (661), 245 states have internal predecessors, (661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:25,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 661 transitions. [2022-03-01 17:29:25,224 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 661 transitions. Word has length 15 [2022-03-01 17:29:25,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:25,224 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 661 transitions. [2022-03-01 17:29:25,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:25,224 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 661 transitions. [2022-03-01 17:29:25,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:25,224 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:25,224 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:25,240 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (152)] Ended with exit code 0 [2022-03-01 17:29:25,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2022-03-01 17:29:25,425 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:25,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:25,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1310503309, now seen corresponding path program 148 times [2022-03-01 17:29:25,425 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:25,425 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051519568] [2022-03-01 17:29:25,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:25,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:25,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:25,493 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:25,493 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051519568] [2022-03-01 17:29:25,493 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051519568] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:25,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294495521] [2022-03-01 17:29:25,494 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:25,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:25,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:25,495 INFO L229 MonitoredProcess]: Starting monitored process 153 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:25,495 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Waiting until timeout for monitored process [2022-03-01 17:29:25,517 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:25,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:25,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:25,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:25,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:25,613 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:25,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:25,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:29:25,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:25,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:29:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:25,646 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:25,720 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:25,720 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:29:25,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:29:25,738 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:25,738 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294495521] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:25,738 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:25,738 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2022-03-01 17:29:25,738 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964341266] [2022-03-01 17:29:25,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:25,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:25,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:25,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:25,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:25,738 INFO L87 Difference]: Start difference. First operand 246 states and 661 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:26,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:26,012 INFO L93 Difference]: Finished difference Result 331 states and 803 transitions. [2022-03-01 17:29:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:29:26,012 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:26,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:26,012 INFO L225 Difference]: With dead ends: 331 [2022-03-01 17:29:26,012 INFO L226 Difference]: Without dead ends: 331 [2022-03-01 17:29:26,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:29:26,013 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 59 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:26,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 92 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 504 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:26,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-03-01 17:29:26,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 242. [2022-03-01 17:29:26,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.676348547717842) internal successors, (645), 241 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:26,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 645 transitions. [2022-03-01 17:29:26,016 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 645 transitions. Word has length 15 [2022-03-01 17:29:26,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:26,016 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 645 transitions. [2022-03-01 17:29:26,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:26,017 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 645 transitions. [2022-03-01 17:29:26,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:26,017 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:26,017 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:26,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (153)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:26,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,153 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:26,236 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:26,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:26,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1065104775, now seen corresponding path program 149 times [2022-03-01 17:29:26,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:26,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390732183] [2022-03-01 17:29:26,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:26,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:26,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:26,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:26,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:26,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390732183] [2022-03-01 17:29:26,308 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390732183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:26,308 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785520224] [2022-03-01 17:29:26,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:26,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:26,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:26,309 INFO L229 MonitoredProcess]: Starting monitored process 154 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:26,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Waiting until timeout for monitored process [2022-03-01 17:29:26,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:29:26,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:26,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:26,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:26,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:26,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:26,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:26,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:26,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:26,581 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:26,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:26,583 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:26,597 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:26,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785520224] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:26,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:26,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:26,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766220401] [2022-03-01 17:29:26,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:26,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:26,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:26,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:26,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:26,598 INFO L87 Difference]: Start difference. First operand 242 states and 645 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:26,768 INFO L93 Difference]: Finished difference Result 336 states and 823 transitions. [2022-03-01 17:29:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:29:26,768 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:26,769 INFO L225 Difference]: With dead ends: 336 [2022-03-01 17:29:26,769 INFO L226 Difference]: Without dead ends: 336 [2022-03-01 17:29:26,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:29:26,769 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 50 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:26,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 114 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 350 Invalid, 0 Unknown, 75 Unchecked, 0.1s Time] [2022-03-01 17:29:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-03-01 17:29:26,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 262. [2022-03-01 17:29:26,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 2.7279693486590038) internal successors, (712), 261 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:26,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 712 transitions. [2022-03-01 17:29:26,773 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 712 transitions. Word has length 15 [2022-03-01 17:29:26,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:26,773 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 712 transitions. [2022-03-01 17:29:26,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:26,773 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 712 transitions. [2022-03-01 17:29:26,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:26,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:26,774 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:26,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (154)] Ended with exit code 0 [2022-03-01 17:29:26,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,154 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:26,987 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:26,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:26,987 INFO L85 PathProgramCache]: Analyzing trace with hash 663942559, now seen corresponding path program 150 times [2022-03-01 17:29:26,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:26,988 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959353353] [2022-03-01 17:29:26,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:26,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:27,059 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:27,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959353353] [2022-03-01 17:29:27,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959353353] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:27,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507570476] [2022-03-01 17:29:27,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:27,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:27,060 INFO L229 MonitoredProcess]: Starting monitored process 155 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:27,061 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Waiting until timeout for monitored process [2022-03-01 17:29:27,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:29:27,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:27,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:27,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:27,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:27,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:27,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:27,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:27,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:27,253 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:27,356 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:27,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:27,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:27,375 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:27,376 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507570476] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:27,376 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:27,376 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:27,376 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847051012] [2022-03-01 17:29:27,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:27,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:27,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:27,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:27,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:27,377 INFO L87 Difference]: Start difference. First operand 262 states and 712 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:27,555 INFO L93 Difference]: Finished difference Result 352 states and 859 transitions. [2022-03-01 17:29:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:29:27,556 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:27,556 INFO L225 Difference]: With dead ends: 352 [2022-03-01 17:29:27,556 INFO L226 Difference]: Without dead ends: 352 [2022-03-01 17:29:27,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:29:27,557 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 354 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:27,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 104 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 354 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-03-01 17:29:27,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-03-01 17:29:27,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 258. [2022-03-01 17:29:27,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.7159533073929962) internal successors, (698), 257 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:27,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 698 transitions. [2022-03-01 17:29:27,561 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 698 transitions. Word has length 15 [2022-03-01 17:29:27,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:27,561 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 698 transitions. [2022-03-01 17:29:27,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:27,561 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 698 transitions. [2022-03-01 17:29:27,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:27,562 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:27,562 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:27,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (155)] Ended with exit code 0 [2022-03-01 17:29:27,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,155 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:27,767 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:27,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:27,767 INFO L85 PathProgramCache]: Analyzing trace with hash 488944349, now seen corresponding path program 151 times [2022-03-01 17:29:27,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:27,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666836739] [2022-03-01 17:29:27,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:27,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:27,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:27,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:27,856 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:27,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666836739] [2022-03-01 17:29:27,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666836739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:27,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163020608] [2022-03-01 17:29:27,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:27,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:27,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:27,857 INFO L229 MonitoredProcess]: Starting monitored process 156 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:27,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Waiting until timeout for monitored process [2022-03-01 17:29:27,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:27,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:27,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:28,027 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:28,027 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:29:28,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:28,029 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:29:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:28,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:28,136 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:28,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:29:28,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:28,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163020608] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:28,158 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:28,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:28,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238139345] [2022-03-01 17:29:28,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:28,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:28,158 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:28,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:28,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:28,158 INFO L87 Difference]: Start difference. First operand 258 states and 698 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:28,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:28,424 INFO L93 Difference]: Finished difference Result 308 states and 766 transitions. [2022-03-01 17:29:28,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:29:28,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:28,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:28,425 INFO L225 Difference]: With dead ends: 308 [2022-03-01 17:29:28,425 INFO L226 Difference]: Without dead ends: 302 [2022-03-01 17:29:28,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:28,425 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 37 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:28,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 82 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 362 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-03-01 17:29:28,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-03-01 17:29:28,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 261. [2022-03-01 17:29:28,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.6923076923076925) internal successors, (700), 260 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:28,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 700 transitions. [2022-03-01 17:29:28,429 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 700 transitions. Word has length 15 [2022-03-01 17:29:28,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:28,429 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 700 transitions. [2022-03-01 17:29:28,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:28,429 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 700 transitions. [2022-03-01 17:29:28,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:28,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:28,430 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:28,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (156)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:28,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,156 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:28,630 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:28,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash -825462437, now seen corresponding path program 152 times [2022-03-01 17:29:28,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:28,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350578772] [2022-03-01 17:29:28,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:28,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:28,719 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:28,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:28,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350578772] [2022-03-01 17:29:28,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350578772] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:28,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875260406] [2022-03-01 17:29:28,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:28,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:28,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:28,720 INFO L229 MonitoredProcess]: Starting monitored process 157 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:28,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Waiting until timeout for monitored process [2022-03-01 17:29:28,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:28,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:28,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:28,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:28,881 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:28,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:28,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:28,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:28,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:28,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:29,003 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:29,003 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:29,005 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:29,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:29,019 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875260406] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:29,019 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:29,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:29,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128332085] [2022-03-01 17:29:29,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:29,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:29,020 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:29,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:29,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:29,020 INFO L87 Difference]: Start difference. First operand 261 states and 700 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:29,527 INFO L93 Difference]: Finished difference Result 342 states and 828 transitions. [2022-03-01 17:29:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:29:29,528 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:29,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:29,528 INFO L225 Difference]: With dead ends: 342 [2022-03-01 17:29:29,528 INFO L226 Difference]: Without dead ends: 342 [2022-03-01 17:29:29,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:29:29,528 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:29,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 74 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 404 Invalid, 0 Unknown, 45 Unchecked, 0.2s Time] [2022-03-01 17:29:29,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2022-03-01 17:29:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 258. [2022-03-01 17:29:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.708171206225681) internal successors, (696), 257 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:29,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 696 transitions. [2022-03-01 17:29:29,532 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 696 transitions. Word has length 15 [2022-03-01 17:29:29,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:29,532 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 696 transitions. [2022-03-01 17:29:29,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:29,532 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 696 transitions. [2022-03-01 17:29:29,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:29,532 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:29,532 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:29,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (157)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:29,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,157 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:29,733 INFO L402 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:29,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:29,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1745163145, now seen corresponding path program 153 times [2022-03-01 17:29:29,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:29,733 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685538047] [2022-03-01 17:29:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:29,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:29,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:29,810 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:29,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685538047] [2022-03-01 17:29:29,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685538047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:29,810 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238491825] [2022-03-01 17:29:29,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:29,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:29,810 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:29,811 INFO L229 MonitoredProcess]: Starting monitored process 158 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:29,812 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Waiting until timeout for monitored process [2022-03-01 17:29:29,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-03-01 17:29:29,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:29,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:29,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:29,986 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:29,987 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:29:29,988 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:29,989 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:29:30,034 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:30,034 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:30,127 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:30,127 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:29:30,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:30,148 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:30,148 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238491825] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:30,148 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:30,148 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:30,148 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085111328] [2022-03-01 17:29:30,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:30,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:30,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:30,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:30,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:30,149 INFO L87 Difference]: Start difference. First operand 258 states and 696 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:30,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:30,518 INFO L93 Difference]: Finished difference Result 307 states and 762 transitions. [2022-03-01 17:29:30,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:29:30,518 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:30,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:30,519 INFO L225 Difference]: With dead ends: 307 [2022-03-01 17:29:30,519 INFO L226 Difference]: Without dead ends: 303 [2022-03-01 17:29:30,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:29:30,519 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:30,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 64 Invalid, 415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 382 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-03-01 17:29:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-03-01 17:29:30,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 259. [2022-03-01 17:29:30,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.701550387596899) internal successors, (697), 258 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:30,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 697 transitions. [2022-03-01 17:29:30,522 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 697 transitions. Word has length 15 [2022-03-01 17:29:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:30,522 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 697 transitions. [2022-03-01 17:29:30,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:30,523 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 697 transitions. [2022-03-01 17:29:30,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:30,523 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:30,523 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:30,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (158)] Ended with exit code 0 [2022-03-01 17:29:30,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2022-03-01 17:29:30,723 INFO L402 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:30,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:30,724 INFO L85 PathProgramCache]: Analyzing trace with hash -817732039, now seen corresponding path program 154 times [2022-03-01 17:29:30,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:30,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906687946] [2022-03-01 17:29:30,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:30,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:30,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:30,805 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:30,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906687946] [2022-03-01 17:29:30,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906687946] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:30,806 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080098557] [2022-03-01 17:29:30,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:30,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:30,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:30,807 INFO L229 MonitoredProcess]: Starting monitored process 159 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:30,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Waiting until timeout for monitored process [2022-03-01 17:29:30,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:30,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:30,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:30,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:30,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:30,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:30,942 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:30,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:31,005 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:31,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:31,095 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:31,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:31,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:31,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:31,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080098557] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:31,112 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:31,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:31,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367135017] [2022-03-01 17:29:31,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:31,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:31,113 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:31,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:31,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:31,113 INFO L87 Difference]: Start difference. First operand 259 states and 697 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:31,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:31,657 INFO L93 Difference]: Finished difference Result 366 states and 847 transitions. [2022-03-01 17:29:31,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:29:31,657 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:31,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:31,658 INFO L225 Difference]: With dead ends: 366 [2022-03-01 17:29:31,658 INFO L226 Difference]: Without dead ends: 365 [2022-03-01 17:29:31,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:29:31,658 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 121 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:31,658 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 84 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:31,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-03-01 17:29:31,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 251. [2022-03-01 17:29:31,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.676) internal successors, (669), 250 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 669 transitions. [2022-03-01 17:29:31,661 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 669 transitions. Word has length 15 [2022-03-01 17:29:31,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:31,661 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 669 transitions. [2022-03-01 17:29:31,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:31,662 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 669 transitions. [2022-03-01 17:29:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:31,662 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:31,662 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:31,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (159)] Ended with exit code 0 [2022-03-01 17:29:31,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,159 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:31,862 INFO L402 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash -16115811, now seen corresponding path program 155 times [2022-03-01 17:29:31,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:31,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317070405] [2022-03-01 17:29:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:31,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:31,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:31,948 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:31,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317070405] [2022-03-01 17:29:31,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317070405] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:31,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73570667] [2022-03-01 17:29:31,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:31,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:31,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:31,949 INFO L229 MonitoredProcess]: Starting monitored process 160 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:31,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Waiting until timeout for monitored process [2022-03-01 17:29:31,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:29:31,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:31,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:31,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:32,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:32,076 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:32,077 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:32,078 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:32,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:32,236 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:32,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:29:32,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:32,258 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73570667] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:32,258 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:32,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:32,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34150252] [2022-03-01 17:29:32,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:32,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:32,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:32,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:32,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:32,259 INFO L87 Difference]: Start difference. First operand 251 states and 669 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:32,670 INFO L93 Difference]: Finished difference Result 317 states and 768 transitions. [2022-03-01 17:29:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:29:32,671 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:32,671 INFO L225 Difference]: With dead ends: 317 [2022-03-01 17:29:32,671 INFO L226 Difference]: Without dead ends: 312 [2022-03-01 17:29:32,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:29:32,671 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 64 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:32,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 74 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:32,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-03-01 17:29:32,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 255. [2022-03-01 17:29:32,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.6811023622047245) internal successors, (681), 254 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:32,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 681 transitions. [2022-03-01 17:29:32,674 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 681 transitions. Word has length 15 [2022-03-01 17:29:32,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:32,675 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 681 transitions. [2022-03-01 17:29:32,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:32,675 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 681 transitions. [2022-03-01 17:29:32,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:32,675 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:32,675 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:32,691 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (160)] Ended with exit code 0 [2022-03-01 17:29:32,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168,160 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:32,877 INFO L402 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:32,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1702227895, now seen corresponding path program 156 times [2022-03-01 17:29:32,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:32,878 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897604349] [2022-03-01 17:29:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:32,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:32,957 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:32,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897604349] [2022-03-01 17:29:32,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897604349] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:32,957 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370339625] [2022-03-01 17:29:32,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:32,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:32,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:32,959 INFO L229 MonitoredProcess]: Starting monitored process 161 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:32,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Waiting until timeout for monitored process [2022-03-01 17:29:32,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:29:32,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:32,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:32,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:33,086 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:33,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:33,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:33,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:33,150 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:33,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:33,233 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:33,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:29:33,236 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:33,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:33,255 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370339625] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:33,255 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:33,255 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:33,255 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29554703] [2022-03-01 17:29:33,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:33,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:33,255 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:33,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:33,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:33,255 INFO L87 Difference]: Start difference. First operand 255 states and 681 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:33,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:33,506 INFO L93 Difference]: Finished difference Result 307 states and 755 transitions. [2022-03-01 17:29:33,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:29:33,506 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:33,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:33,507 INFO L225 Difference]: With dead ends: 307 [2022-03-01 17:29:33,507 INFO L226 Difference]: Without dead ends: 307 [2022-03-01 17:29:33,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:29:33,507 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:33,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 84 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:29:33,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-03-01 17:29:33,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 241. [2022-03-01 17:29:33,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.6625) internal successors, (639), 240 states have internal predecessors, (639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:33,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 639 transitions. [2022-03-01 17:29:33,511 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 639 transitions. Word has length 15 [2022-03-01 17:29:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:33,519 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 639 transitions. [2022-03-01 17:29:33,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 639 transitions. [2022-03-01 17:29:33,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:33,519 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:33,519 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:33,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (161)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:33,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2022-03-01 17:29:33,735 INFO L402 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:33,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:33,736 INFO L85 PathProgramCache]: Analyzing trace with hash -846468645, now seen corresponding path program 157 times [2022-03-01 17:29:33,736 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:33,736 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509601291] [2022-03-01 17:29:33,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:33,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:33,799 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:33,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509601291] [2022-03-01 17:29:33,799 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509601291] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:33,799 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893415253] [2022-03-01 17:29:33,799 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:33,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:33,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:33,800 INFO L229 MonitoredProcess]: Starting monitored process 162 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:33,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Waiting until timeout for monitored process [2022-03-01 17:29:33,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:33,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:33,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:33,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:33,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:33,945 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:33,946 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:29:33,966 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:33,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:34,038 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:34,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:29:34,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:29:34,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:34,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893415253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:34,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:34,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:29:34,057 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48442159] [2022-03-01 17:29:34,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:34,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:34,057 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:34,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:34,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:34,057 INFO L87 Difference]: Start difference. First operand 241 states and 639 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:34,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:34,260 INFO L93 Difference]: Finished difference Result 305 states and 766 transitions. [2022-03-01 17:29:34,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:29:34,260 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:34,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:34,261 INFO L225 Difference]: With dead ends: 305 [2022-03-01 17:29:34,261 INFO L226 Difference]: Without dead ends: 305 [2022-03-01 17:29:34,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:34,261 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 43 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:34,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 68 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 471 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-03-01 17:29:34,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-01 17:29:34,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 251. [2022-03-01 17:29:34,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.708) internal successors, (677), 250 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:34,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 677 transitions. [2022-03-01 17:29:34,264 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 677 transitions. Word has length 15 [2022-03-01 17:29:34,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:34,265 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 677 transitions. [2022-03-01 17:29:34,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:34,265 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 677 transitions. [2022-03-01 17:29:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:34,265 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:34,265 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:34,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (162)] Ended with exit code 0 [2022-03-01 17:29:34,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,162 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:34,465 INFO L402 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:34,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:34,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1766169353, now seen corresponding path program 158 times [2022-03-01 17:29:34,466 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:34,466 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030709749] [2022-03-01 17:29:34,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:34,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:34,550 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:34,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030709749] [2022-03-01 17:29:34,550 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030709749] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:34,550 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024968668] [2022-03-01 17:29:34,550 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:34,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:34,552 INFO L229 MonitoredProcess]: Starting monitored process 163 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:34,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Waiting until timeout for monitored process [2022-03-01 17:29:34,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:34,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:34,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:34,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:34,708 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:34,709 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:29:34,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:34,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:29:34,753 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:34,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:34,817 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:34,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:29:34,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:34,842 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:34,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024968668] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:34,842 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:34,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:29:34,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132404870] [2022-03-01 17:29:34,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:34,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:34,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:34,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:34,843 INFO L87 Difference]: Start difference. First operand 251 states and 677 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:35,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:35,091 INFO L93 Difference]: Finished difference Result 284 states and 723 transitions. [2022-03-01 17:29:35,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:29:35,091 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:35,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:35,091 INFO L225 Difference]: With dead ends: 284 [2022-03-01 17:29:35,091 INFO L226 Difference]: Without dead ends: 280 [2022-03-01 17:29:35,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:29:35,092 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 47 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 13 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:35,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 34 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 380 Invalid, 0 Unknown, 13 Unchecked, 0.1s Time] [2022-03-01 17:29:35,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-03-01 17:29:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 251. [2022-03-01 17:29:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.7) internal successors, (675), 250 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 675 transitions. [2022-03-01 17:29:35,095 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 675 transitions. Word has length 15 [2022-03-01 17:29:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:35,095 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 675 transitions. [2022-03-01 17:29:35,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:35,095 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 675 transitions. [2022-03-01 17:29:35,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:35,095 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:35,095 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:35,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (163)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:35,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2022-03-01 17:29:35,296 INFO L402 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:35,296 INFO L85 PathProgramCache]: Analyzing trace with hash -838738247, now seen corresponding path program 159 times [2022-03-01 17:29:35,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:35,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563465556] [2022-03-01 17:29:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:35,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:35,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:35,365 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:35,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:35,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563465556] [2022-03-01 17:29:35,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563465556] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:35,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158123933] [2022-03-01 17:29:35,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:35,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:35,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:35,366 INFO L229 MonitoredProcess]: Starting monitored process 164 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:35,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Waiting until timeout for monitored process [2022-03-01 17:29:35,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:29:35,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:35,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:35,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:35,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:35,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:35,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:35,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:35,583 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:35,583 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:35,651 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:35,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:29:35,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:29:35,669 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:35,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158123933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:35,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:35,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:29:35,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555574608] [2022-03-01 17:29:35,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:35,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:35,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:35,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:35,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:35,670 INFO L87 Difference]: Start difference. First operand 251 states and 675 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:35,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:35,928 INFO L93 Difference]: Finished difference Result 348 states and 828 transitions. [2022-03-01 17:29:35,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:29:35,929 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:35,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:35,929 INFO L225 Difference]: With dead ends: 348 [2022-03-01 17:29:35,929 INFO L226 Difference]: Without dead ends: 347 [2022-03-01 17:29:35,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:29:35,929 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 75 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:35,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 40 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:29:35,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2022-03-01 17:29:35,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 253. [2022-03-01 17:29:35,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.7023809523809526) internal successors, (681), 252 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:35,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 681 transitions. [2022-03-01 17:29:35,932 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 681 transitions. Word has length 15 [2022-03-01 17:29:35,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:35,933 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 681 transitions. [2022-03-01 17:29:35,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 681 transitions. [2022-03-01 17:29:35,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:35,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:35,933 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:35,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (164)] Ended with exit code 0 [2022-03-01 17:29:36,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,164 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:36,134 INFO L402 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:36,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:36,134 INFO L85 PathProgramCache]: Analyzing trace with hash -37122019, now seen corresponding path program 160 times [2022-03-01 17:29:36,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:36,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522514185] [2022-03-01 17:29:36,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:36,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:36,204 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:36,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522514185] [2022-03-01 17:29:36,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522514185] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:36,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603280190] [2022-03-01 17:29:36,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:36,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:36,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:36,205 INFO L229 MonitoredProcess]: Starting monitored process 165 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:36,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Waiting until timeout for monitored process [2022-03-01 17:29:36,227 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:36,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:36,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:36,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:36,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:36,312 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:36,313 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:36,314 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:36,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:36,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:36,449 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:36,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:29:36,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:36,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:36,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603280190] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:36,472 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:36,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:29:36,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997835482] [2022-03-01 17:29:36,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:36,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:36,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:36,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:36,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:36,473 INFO L87 Difference]: Start difference. First operand 253 states and 681 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:36,797 INFO L93 Difference]: Finished difference Result 319 states and 777 transitions. [2022-03-01 17:29:36,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:29:36,797 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:36,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:36,797 INFO L225 Difference]: With dead ends: 319 [2022-03-01 17:29:36,797 INFO L226 Difference]: Without dead ends: 315 [2022-03-01 17:29:36,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:36,798 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 82 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:36,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 26 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:36,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-03-01 17:29:36,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 255. [2022-03-01 17:29:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.6929133858267718) internal successors, (684), 254 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 684 transitions. [2022-03-01 17:29:36,803 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 684 transitions. Word has length 15 [2022-03-01 17:29:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:36,804 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 684 transitions. [2022-03-01 17:29:36,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 684 transitions. [2022-03-01 17:29:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:36,804 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:36,804 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:36,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (165)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:37,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,165 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:37,026 INFO L402 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:37,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:37,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1681221687, now seen corresponding path program 161 times [2022-03-01 17:29:37,027 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:37,027 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220377825] [2022-03-01 17:29:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:37,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:37,097 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:37,098 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:37,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220377825] [2022-03-01 17:29:37,098 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220377825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:37,098 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878884278] [2022-03-01 17:29:37,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:37,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:37,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:37,099 INFO L229 MonitoredProcess]: Starting monitored process 166 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:37,100 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Waiting until timeout for monitored process [2022-03-01 17:29:37,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:29:37,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:37,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:37,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:37,251 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:37,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:37,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:37,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:37,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:37,395 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:37,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:29:37,397 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:37,418 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:37,418 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878884278] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:37,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:37,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:29:37,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323474074] [2022-03-01 17:29:37,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:37,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:37,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:37,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:37,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:37,419 INFO L87 Difference]: Start difference. First operand 255 states and 684 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:37,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:37,634 INFO L93 Difference]: Finished difference Result 305 states and 756 transitions. [2022-03-01 17:29:37,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:29:37,635 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:37,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:37,635 INFO L225 Difference]: With dead ends: 305 [2022-03-01 17:29:37,635 INFO L226 Difference]: Without dead ends: 305 [2022-03-01 17:29:37,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:29:37,639 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:37,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 52 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-01 17:29:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-03-01 17:29:37,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 252. [2022-03-01 17:29:37,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.6733067729083664) internal successors, (671), 251 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:37,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 671 transitions. [2022-03-01 17:29:37,643 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 671 transitions. Word has length 15 [2022-03-01 17:29:37,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:37,643 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 671 transitions. [2022-03-01 17:29:37,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:37,643 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 671 transitions. [2022-03-01 17:29:37,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:37,644 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:37,644 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:37,660 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (166)] Ended with exit code 0 [2022-03-01 17:29:37,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,166 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:37,847 INFO L402 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:37,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:37,847 INFO L85 PathProgramCache]: Analyzing trace with hash -720622057, now seen corresponding path program 162 times [2022-03-01 17:29:37,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:37,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912850015] [2022-03-01 17:29:37,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:37,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:37,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:29:37,917 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:37,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912850015] [2022-03-01 17:29:37,917 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912850015] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:37,917 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296745993] [2022-03-01 17:29:37,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:37,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:37,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:37,918 INFO L229 MonitoredProcess]: Starting monitored process 167 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:37,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Waiting until timeout for monitored process [2022-03-01 17:29:37,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:29:37,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:37,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:37,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:38,025 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:38,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:38,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:38,028 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:38,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:38,155 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:38,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:29:38,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:38,179 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:29:38,179 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296745993] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:38,179 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:38,179 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:29:38,179 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758328713] [2022-03-01 17:29:38,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:38,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:38,184 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:38,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:38,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:38,184 INFO L87 Difference]: Start difference. First operand 252 states and 671 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:38,595 INFO L93 Difference]: Finished difference Result 310 states and 761 transitions. [2022-03-01 17:29:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:29:38,595 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:38,596 INFO L225 Difference]: With dead ends: 310 [2022-03-01 17:29:38,596 INFO L226 Difference]: Without dead ends: 306 [2022-03-01 17:29:38,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:29:38,596 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 64 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:38,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 50 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:38,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2022-03-01 17:29:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 255. [2022-03-01 17:29:38,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.6811023622047245) internal successors, (681), 254 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:38,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 681 transitions. [2022-03-01 17:29:38,599 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 681 transitions. Word has length 15 [2022-03-01 17:29:38,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:38,599 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 681 transitions. [2022-03-01 17:29:38,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:38,600 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 681 transitions. [2022-03-01 17:29:38,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:38,600 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:38,600 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:38,616 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (167)] Ended with exit code 0 [2022-03-01 17:29:38,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,167 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:38,801 INFO L402 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:38,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:38,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1008425277, now seen corresponding path program 163 times [2022-03-01 17:29:38,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:38,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219894851] [2022-03-01 17:29:38,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:38,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:38,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:29:38,868 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:38,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219894851] [2022-03-01 17:29:38,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219894851] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:38,869 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880350377] [2022-03-01 17:29:38,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:38,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:38,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:38,870 INFO L229 MonitoredProcess]: Starting monitored process 168 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:38,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Waiting until timeout for monitored process [2022-03-01 17:29:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:38,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:38,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:39,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:39,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:29:39,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:39,008 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:29:39,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:39,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:39,101 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:29:39,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:29:39,103 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:39,125 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:29:39,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880350377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:39,125 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:39,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 15 [2022-03-01 17:29:39,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24242016] [2022-03-01 17:29:39,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:39,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-01 17:29:39,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-01 17:29:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-03-01 17:29:39,126 INFO L87 Difference]: Start difference. First operand 255 states and 681 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:39,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:39,457 INFO L93 Difference]: Finished difference Result 278 states and 713 transitions. [2022-03-01 17:29:39,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:29:39,457 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:39,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:39,458 INFO L225 Difference]: With dead ends: 278 [2022-03-01 17:29:39,458 INFO L226 Difference]: Without dead ends: 270 [2022-03-01 17:29:39,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:29:39,458 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 41 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:39,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 42 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-03-01 17:29:39,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 255. [2022-03-01 17:29:39,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 2.673228346456693) internal successors, (679), 254 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:39,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 679 transitions. [2022-03-01 17:29:39,461 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 679 transitions. Word has length 15 [2022-03-01 17:29:39,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:39,461 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 679 transitions. [2022-03-01 17:29:39,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:39,461 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 679 transitions. [2022-03-01 17:29:39,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:39,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:39,461 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:39,477 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (168)] Ended with exit code 0 [2022-03-01 17:29:39,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2022-03-01 17:29:39,662 INFO L402 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:39,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:39,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1255057863, now seen corresponding path program 164 times [2022-03-01 17:29:39,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:39,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161534387] [2022-03-01 17:29:39,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:39,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:39,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:39,754 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:39,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161534387] [2022-03-01 17:29:39,754 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161534387] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:39,754 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546698008] [2022-03-01 17:29:39,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:39,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:39,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:39,756 INFO L229 MonitoredProcess]: Starting monitored process 169 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:39,756 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Waiting until timeout for monitored process [2022-03-01 17:29:39,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:39,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:39,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:39,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:39,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:39,885 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:39,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:39,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:39,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:40,035 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:40,035 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:29:40,037 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:29:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:40,056 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546698008] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:40,056 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:40,056 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:40,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414507336] [2022-03-01 17:29:40,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:40,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:40,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:40,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:40,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:40,057 INFO L87 Difference]: Start difference. First operand 255 states and 679 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:40,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:40,346 INFO L93 Difference]: Finished difference Result 361 states and 862 transitions. [2022-03-01 17:29:40,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:29:40,346 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:40,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:40,347 INFO L225 Difference]: With dead ends: 361 [2022-03-01 17:29:40,347 INFO L226 Difference]: Without dead ends: 361 [2022-03-01 17:29:40,347 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:29:40,347 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 98 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:40,347 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 72 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:40,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2022-03-01 17:29:40,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 264. [2022-03-01 17:29:40,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.7072243346007605) internal successors, (712), 263 states have internal predecessors, (712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:40,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 712 transitions. [2022-03-01 17:29:40,355 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 712 transitions. Word has length 15 [2022-03-01 17:29:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:40,355 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 712 transitions. [2022-03-01 17:29:40,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 712 transitions. [2022-03-01 17:29:40,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:40,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:40,355 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:40,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (169)] Ended with exit code 0 [2022-03-01 17:29:40,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,169 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:40,556 INFO L402 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:40,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash -453441635, now seen corresponding path program 165 times [2022-03-01 17:29:40,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:40,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294289640] [2022-03-01 17:29:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:40,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:40,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:40,629 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:40,629 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:40,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294289640] [2022-03-01 17:29:40,629 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294289640] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:40,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690580674] [2022-03-01 17:29:40,629 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:40,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:40,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:40,630 INFO L229 MonitoredProcess]: Starting monitored process 170 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:40,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Waiting until timeout for monitored process [2022-03-01 17:29:40,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:29:40,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:40,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:40,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:40,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:40,781 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:40,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:40,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:40,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:40,940 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:40,940 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:40,942 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:40,957 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690580674] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:40,957 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:40,957 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:40,957 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927428210] [2022-03-01 17:29:40,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:40,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:40,957 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:40,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:40,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:40,958 INFO L87 Difference]: Start difference. First operand 264 states and 712 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:41,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:41,727 INFO L93 Difference]: Finished difference Result 375 states and 884 transitions. [2022-03-01 17:29:41,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:29:41,727 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:41,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:41,728 INFO L225 Difference]: With dead ends: 375 [2022-03-01 17:29:41,728 INFO L226 Difference]: Without dead ends: 366 [2022-03-01 17:29:41,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=246, Invalid=1314, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:29:41,728 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 128 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:41,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 70 Invalid, 562 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:41,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-01 17:29:41,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 274. [2022-03-01 17:29:41,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 273 states have (on average 2.7142857142857144) internal successors, (741), 273 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:41,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 741 transitions. [2022-03-01 17:29:41,732 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 741 transitions. Word has length 15 [2022-03-01 17:29:41,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:41,732 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 741 transitions. [2022-03-01 17:29:41,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:41,732 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 741 transitions. [2022-03-01 17:29:41,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:41,732 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:41,732 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:41,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (170)] Ended with exit code 0 [2022-03-01 17:29:41,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2022-03-01 17:29:41,933 INFO L402 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:41,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1264902071, now seen corresponding path program 166 times [2022-03-01 17:29:41,933 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:41,933 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63285292] [2022-03-01 17:29:41,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:41,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:41,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:42,011 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:42,011 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:42,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63285292] [2022-03-01 17:29:42,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [63285292] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:42,011 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811432829] [2022-03-01 17:29:42,011 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:42,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:42,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:42,012 INFO L229 MonitoredProcess]: Starting monitored process 171 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:42,013 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Waiting until timeout for monitored process [2022-03-01 17:29:42,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:42,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:42,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:42,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:42,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:42,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:29:42,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:42,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:29:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:42,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:42,287 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:42,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:42,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:42,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811432829] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:42,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:42,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:42,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149301684] [2022-03-01 17:29:42,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:42,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:42,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:42,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:42,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:42,304 INFO L87 Difference]: Start difference. First operand 274 states and 741 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:42,857 INFO L93 Difference]: Finished difference Result 353 states and 851 transitions. [2022-03-01 17:29:42,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:29:42,857 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:42,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:42,858 INFO L225 Difference]: With dead ends: 353 [2022-03-01 17:29:42,858 INFO L226 Difference]: Without dead ends: 351 [2022-03-01 17:29:42,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:29:42,858 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:42,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 44 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 480 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:42,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-01 17:29:42,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 257. [2022-03-01 17:29:42,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.65234375) internal successors, (679), 256 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 679 transitions. [2022-03-01 17:29:42,863 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 679 transitions. Word has length 15 [2022-03-01 17:29:42,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:42,863 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 679 transitions. [2022-03-01 17:29:42,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 679 transitions. [2022-03-01 17:29:42,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:42,864 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:42,864 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:42,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (171)] Ended with exit code 0 [2022-03-01 17:29:43,086 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2022-03-01 17:29:43,086 INFO L402 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:43,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:43,087 INFO L85 PathProgramCache]: Analyzing trace with hash -445711237, now seen corresponding path program 167 times [2022-03-01 17:29:43,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:43,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405928776] [2022-03-01 17:29:43,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:43,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:43,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:43,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:43,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:43,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405928776] [2022-03-01 17:29:43,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405928776] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:43,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418603864] [2022-03-01 17:29:43,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:43,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:43,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:43,170 INFO L229 MonitoredProcess]: Starting monitored process 172 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:43,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Waiting until timeout for monitored process [2022-03-01 17:29:43,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:29:43,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:43,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:43,316 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:43,316 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:43,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:43,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:29:43,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:43,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:29:43,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:43,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:43,441 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:43,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:43,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:43,457 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:43,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418603864] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:43,458 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:43,458 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-03-01 17:29:43,458 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487495484] [2022-03-01 17:29:43,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:43,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:29:43,458 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:43,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:29:43,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:29:43,458 INFO L87 Difference]: Start difference. First operand 257 states and 679 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:44,097 INFO L93 Difference]: Finished difference Result 338 states and 827 transitions. [2022-03-01 17:29:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:29:44,097 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:44,097 INFO L225 Difference]: With dead ends: 338 [2022-03-01 17:29:44,097 INFO L226 Difference]: Without dead ends: 338 [2022-03-01 17:29:44,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1044, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:29:44,098 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 57 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:44,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 44 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:44,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2022-03-01 17:29:44,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 251. [2022-03-01 17:29:44,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 2.652) internal successors, (663), 250 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:44,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 663 transitions. [2022-03-01 17:29:44,101 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 663 transitions. Word has length 15 [2022-03-01 17:29:44,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:44,101 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 663 transitions. [2022-03-01 17:29:44,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 663 transitions. [2022-03-01 17:29:44,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-03-01 17:29:44,101 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:44,102 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:44,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (172)] Ended with exit code 0 [2022-03-01 17:29:44,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 172 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable180 [2022-03-01 17:29:44,302 INFO L402 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:44,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:44,302 INFO L85 PathProgramCache]: Analyzing trace with hash -1935116233, now seen corresponding path program 168 times [2022-03-01 17:29:44,302 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:44,302 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759822812] [2022-03-01 17:29:44,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:44,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:44,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:44,373 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:44,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759822812] [2022-03-01 17:29:44,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759822812] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:44,373 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762499377] [2022-03-01 17:29:44,373 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:29:44,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:44,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:44,375 INFO L229 MonitoredProcess]: Starting monitored process 173 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:44,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Waiting until timeout for monitored process [2022-03-01 17:29:44,398 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:29:44,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:44,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-03-01 17:29:44,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:44,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:44,513 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:29:44,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:44,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:29:44,519 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:44,520 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:29:44,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:44,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:44,630 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:29:44,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:29:44,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:29:44,646 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:44,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762499377] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:44,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:44,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-03-01 17:29:44,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943285629] [2022-03-01 17:29:44,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:44,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-03-01 17:29:44,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:44,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-03-01 17:29:44,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-03-01 17:29:44,647 INFO L87 Difference]: Start difference. First operand 251 states and 663 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:44,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:44,857 INFO L93 Difference]: Finished difference Result 304 states and 758 transitions. [2022-03-01 17:29:44,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:29:44,857 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2022-03-01 17:29:44,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:44,857 INFO L225 Difference]: With dead ends: 304 [2022-03-01 17:29:44,857 INFO L226 Difference]: Without dead ends: 304 [2022-03-01 17:29:44,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:29:44,858 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 36 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:44,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 46 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:29:44,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-03-01 17:29:44,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 248. [2022-03-01 17:29:44,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 2.6437246963562755) internal successors, (653), 247 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:44,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 653 transitions. [2022-03-01 17:29:44,861 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 653 transitions. Word has length 15 [2022-03-01 17:29:44,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:44,861 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 653 transitions. [2022-03-01 17:29:44,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:44,861 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 653 transitions. [2022-03-01 17:29:44,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:29:44,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:44,861 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:44,877 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (173)] Ended with exit code 0 [2022-03-01 17:29:45,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,173 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:45,062 INFO L402 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:45,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:45,062 INFO L85 PathProgramCache]: Analyzing trace with hash 757370353, now seen corresponding path program 169 times [2022-03-01 17:29:45,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:45,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741104788] [2022-03-01 17:29:45,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:45,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:45,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:45,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741104788] [2022-03-01 17:29:45,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741104788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:45,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608264988] [2022-03-01 17:29:45,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:29:45,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:45,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:45,449 INFO L229 MonitoredProcess]: Starting monitored process 174 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:45,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Waiting until timeout for monitored process [2022-03-01 17:29:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:45,475 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:29:45,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:46,074 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:46,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:46,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:46,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:46,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:46,076 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:46,077 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:29:46,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:46,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:29:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:46,121 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:47,020 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:29:47,020 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 246 treesize of output 238 [2022-03-01 17:29:47,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:47,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:47,031 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:47,062 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:47,062 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 252 [2022-03-01 17:29:47,668 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:47,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608264988] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:47,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:47,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:29:47,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816404460] [2022-03-01 17:29:47,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:47,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:47,669 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:47,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:47,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:47,669 INFO L87 Difference]: Start difference. First operand 248 states and 653 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:48,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:48,284 INFO L93 Difference]: Finished difference Result 335 states and 845 transitions. [2022-03-01 17:29:48,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:29:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:29:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:48,284 INFO L225 Difference]: With dead ends: 335 [2022-03-01 17:29:48,284 INFO L226 Difference]: Without dead ends: 333 [2022-03-01 17:29:48,285 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:29:48,285 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 42 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:48,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 38 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 356 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-03-01 17:29:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-01 17:29:48,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 254. [2022-03-01 17:29:48,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 2.624505928853755) internal successors, (664), 253 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:48,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 664 transitions. [2022-03-01 17:29:48,289 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 664 transitions. Word has length 16 [2022-03-01 17:29:48,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:48,289 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 664 transitions. [2022-03-01 17:29:48,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:48,289 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 664 transitions. [2022-03-01 17:29:48,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:29:48,290 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:48,290 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:48,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (174)] Ended with exit code 0 [2022-03-01 17:29:48,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,174 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:48,504 INFO L402 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:48,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:48,504 INFO L85 PathProgramCache]: Analyzing trace with hash -2026434779, now seen corresponding path program 170 times [2022-03-01 17:29:48,504 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:48,504 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003053833] [2022-03-01 17:29:48,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:48,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:48,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:48,973 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:48,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003053833] [2022-03-01 17:29:48,973 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003053833] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:48,973 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114213682] [2022-03-01 17:29:48,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:29:48,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:48,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:48,974 INFO L229 MonitoredProcess]: Starting monitored process 175 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:48,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Waiting until timeout for monitored process [2022-03-01 17:29:49,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:29:49,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:49,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:29:49,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:49,612 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:49,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:49,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:49,615 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:49,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:49,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:49,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:29:49,620 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:49,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:29:49,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:49,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:50,573 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:29:50,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 246 treesize of output 238 [2022-03-01 17:29:50,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:50,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:50,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:50,610 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:50,610 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 252 [2022-03-01 17:29:51,087 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:51,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114213682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:51,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:51,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:29:51,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766271313] [2022-03-01 17:29:51,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:51,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:51,088 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:51,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:51,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:51,088 INFO L87 Difference]: Start difference. First operand 254 states and 664 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:51,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:51,928 INFO L93 Difference]: Finished difference Result 326 states and 837 transitions. [2022-03-01 17:29:51,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:29:51,929 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:29:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:51,929 INFO L225 Difference]: With dead ends: 326 [2022-03-01 17:29:51,929 INFO L226 Difference]: Without dead ends: 323 [2022-03-01 17:29:51,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:29:51,930 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 457 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:51,930 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 20 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 457 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2022-03-01 17:29:51,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-03-01 17:29:51,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 257. [2022-03-01 17:29:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.6171875) internal successors, (670), 256 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:51,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 670 transitions. [2022-03-01 17:29:51,933 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 670 transitions. Word has length 16 [2022-03-01 17:29:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:51,933 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 670 transitions. [2022-03-01 17:29:51,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 670 transitions. [2022-03-01 17:29:51,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:29:51,933 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:51,933 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:51,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (175)] Ended with exit code 0 [2022-03-01 17:29:52,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2022-03-01 17:29:52,134 INFO L402 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:52,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:52,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1855732349, now seen corresponding path program 171 times [2022-03-01 17:29:52,134 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:52,134 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194463371] [2022-03-01 17:29:52,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:52,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:52,534 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:52,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194463371] [2022-03-01 17:29:52,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194463371] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:52,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669025354] [2022-03-01 17:29:52,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:29:52,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:52,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:52,536 INFO L229 MonitoredProcess]: Starting monitored process 176 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:52,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Waiting until timeout for monitored process [2022-03-01 17:29:52,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:29:52,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:52,562 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:29:52,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:53,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:53,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:53,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:53,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:29:53,178 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:53,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:29:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:53,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:54,108 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:29:54,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 246 treesize of output 238 [2022-03-01 17:29:54,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:54,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:54,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:54,143 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:54,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 252 [2022-03-01 17:29:54,527 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:54,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669025354] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:54,527 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:54,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:29:54,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934446451] [2022-03-01 17:29:54,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:54,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:54,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:54,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:54,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:54,528 INFO L87 Difference]: Start difference. First operand 257 states and 670 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:55,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:55,335 INFO L93 Difference]: Finished difference Result 326 states and 836 transitions. [2022-03-01 17:29:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:29:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:29:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:55,336 INFO L225 Difference]: With dead ends: 326 [2022-03-01 17:29:55,336 INFO L226 Difference]: Without dead ends: 324 [2022-03-01 17:29:55,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=118, Invalid=1072, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:29:55,336 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:55,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 17 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 430 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2022-03-01 17:29:55,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-01 17:29:55,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 256. [2022-03-01 17:29:55,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 2.619607843137255) internal successors, (668), 255 states have internal predecessors, (668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:55,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 668 transitions. [2022-03-01 17:29:55,339 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 668 transitions. Word has length 16 [2022-03-01 17:29:55,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:55,340 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 668 transitions. [2022-03-01 17:29:55,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:55,340 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 668 transitions. [2022-03-01 17:29:55,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:29:55,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:55,340 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:55,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (176)] Ended with exit code 0 [2022-03-01 17:29:55,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,176 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:55,540 INFO L402 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:55,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:55,541 INFO L85 PathProgramCache]: Analyzing trace with hash -997452465, now seen corresponding path program 172 times [2022-03-01 17:29:55,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:55,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145278548] [2022-03-01 17:29:55,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:55,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:55,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:55,939 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:55,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145278548] [2022-03-01 17:29:55,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145278548] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:55,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568123770] [2022-03-01 17:29:55,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:29:55,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:55,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:55,940 INFO L229 MonitoredProcess]: Starting monitored process 177 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:55,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Waiting until timeout for monitored process [2022-03-01 17:29:55,965 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:29:55,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:55,965 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:29:55,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:56,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:56,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:56,593 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:56,594 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:56,594 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:29:56,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:56,596 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:29:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:56,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:29:57,527 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:29:57,528 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 246 treesize of output 238 [2022-03-01 17:29:57,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:57,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:57,534 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:57,564 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:29:57,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 252 [2022-03-01 17:29:58,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:58,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568123770] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:29:58,007 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:29:58,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:29:58,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342136466] [2022-03-01 17:29:58,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:29:58,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:29:58,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:29:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:29:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:29:58,008 INFO L87 Difference]: Start difference. First operand 256 states and 668 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:58,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:29:58,635 INFO L93 Difference]: Finished difference Result 332 states and 847 transitions. [2022-03-01 17:29:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:29:58,636 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:29:58,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:29:58,636 INFO L225 Difference]: With dead ends: 332 [2022-03-01 17:29:58,636 INFO L226 Difference]: Without dead ends: 330 [2022-03-01 17:29:58,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=109, Invalid=947, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:29:58,636 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 179 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:29:58,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 21 Invalid, 591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 407 Invalid, 0 Unknown, 179 Unchecked, 0.2s Time] [2022-03-01 17:29:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-01 17:29:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 258. [2022-03-01 17:29:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.614785992217899) internal successors, (672), 257 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:58,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 672 transitions. [2022-03-01 17:29:58,640 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 672 transitions. Word has length 16 [2022-03-01 17:29:58,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:29:58,640 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 672 transitions. [2022-03-01 17:29:58,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:29:58,640 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 672 transitions. [2022-03-01 17:29:58,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:29:58,640 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:29:58,640 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:29:58,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (177)] Forceful destruction successful, exit code 0 [2022-03-01 17:29:58,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,177 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:58,841 INFO L402 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:29:58,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:29:58,841 INFO L85 PathProgramCache]: Analyzing trace with hash -160579837, now seen corresponding path program 173 times [2022-03-01 17:29:58,841 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:29:58,841 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755108211] [2022-03-01 17:29:58,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:29:58,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:29:58,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:29:59,234 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:59,234 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:29:59,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755108211] [2022-03-01 17:29:59,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755108211] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:29:59,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483466856] [2022-03-01 17:29:59,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:29:59,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:29:59,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:29:59,235 INFO L229 MonitoredProcess]: Starting monitored process 178 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:29:59,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Waiting until timeout for monitored process [2022-03-01 17:29:59,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:29:59,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:29:59,262 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:29:59,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:29:59,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:59,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:59,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:59,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:59,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:29:59,917 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:59,917 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:29:59,919 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:29:59,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:29:59,968 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:29:59,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:00,862 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:00,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 246 treesize of output 238 [2022-03-01 17:30:00,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:00,866 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:00,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:00,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:00,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 252 [2022-03-01 17:30:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:01,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483466856] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:01,608 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:01,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:30:01,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260356486] [2022-03-01 17:30:01,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:01,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:01,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:01,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:01,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:01,609 INFO L87 Difference]: Start difference. First operand 258 states and 672 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:02,552 INFO L93 Difference]: Finished difference Result 354 states and 885 transitions. [2022-03-01 17:30:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:30:02,553 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:02,553 INFO L225 Difference]: With dead ends: 354 [2022-03-01 17:30:02,553 INFO L226 Difference]: Without dead ends: 350 [2022-03-01 17:30:02,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:30:02,554 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:02,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 20 Invalid, 534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 388 Invalid, 0 Unknown, 140 Unchecked, 0.2s Time] [2022-03-01 17:30:02,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350 states. [2022-03-01 17:30:02,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350 to 261. [2022-03-01 17:30:02,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 2.6115384615384616) internal successors, (679), 260 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:02,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 679 transitions. [2022-03-01 17:30:02,558 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 679 transitions. Word has length 16 [2022-03-01 17:30:02,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:02,558 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 679 transitions. [2022-03-01 17:30:02,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:02,558 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 679 transitions. [2022-03-01 17:30:02,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:02,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:02,559 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:02,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (178)] Ended with exit code 0 [2022-03-01 17:30:02,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,178 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:02,771 INFO L402 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:02,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:02,772 INFO L85 PathProgramCache]: Analyzing trace with hash 92986111, now seen corresponding path program 174 times [2022-03-01 17:30:02,772 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:02,772 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022695610] [2022-03-01 17:30:02,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:02,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:02,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:03,036 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:03,036 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:03,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022695610] [2022-03-01 17:30:03,036 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022695610] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:03,036 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398194671] [2022-03-01 17:30:03,037 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:30:03,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:03,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:03,038 INFO L229 MonitoredProcess]: Starting monitored process 179 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:03,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Waiting until timeout for monitored process [2022-03-01 17:30:03,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:30:03,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:03,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:03,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:03,583 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:03,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:03,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:03,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:03,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:03,586 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:03,586 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:03,588 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:03,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:03,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:03,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:04,485 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:04,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:30:04,491 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:04,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:04,494 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:04,523 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:04,523 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:30:04,949 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:04,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398194671] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:04,950 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:04,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:30:04,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459167466] [2022-03-01 17:30:04,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:04,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:04,950 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:04,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:04,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=535, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:04,950 INFO L87 Difference]: Start difference. First operand 261 states and 679 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:05,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:05,904 INFO L93 Difference]: Finished difference Result 335 states and 855 transitions. [2022-03-01 17:30:05,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:30:05,905 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:05,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:05,905 INFO L225 Difference]: With dead ends: 335 [2022-03-01 17:30:05,905 INFO L226 Difference]: Without dead ends: 328 [2022-03-01 17:30:05,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:30:05,905 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 504 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 504 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:05,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 20 Invalid, 687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 504 Invalid, 0 Unknown, 173 Unchecked, 0.3s Time] [2022-03-01 17:30:05,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-01 17:30:05,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 265. [2022-03-01 17:30:05,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 264 states have (on average 2.617424242424242) internal successors, (691), 264 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 691 transitions. [2022-03-01 17:30:05,910 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 691 transitions. Word has length 16 [2022-03-01 17:30:05,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:05,910 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 691 transitions. [2022-03-01 17:30:05,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:05,910 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 691 transitions. [2022-03-01 17:30:05,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:05,910 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:05,910 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:05,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (179)] Ended with exit code 0 [2022-03-01 17:30:06,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,179 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:06,111 INFO L402 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:06,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1700507297, now seen corresponding path program 175 times [2022-03-01 17:30:06,111 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:06,111 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471878559] [2022-03-01 17:30:06,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:06,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:06,503 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:06,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471878559] [2022-03-01 17:30:06,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471878559] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:06,503 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675978755] [2022-03-01 17:30:06,503 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:30:06,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:06,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:06,504 INFO L229 MonitoredProcess]: Starting monitored process 180 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:06,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Waiting until timeout for monitored process [2022-03-01 17:30:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:06,529 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:06,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:07,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:07,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:07,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:07,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:07,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:07,134 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:30:07,135 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 79 [2022-03-01 17:30:07,140 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:30:07,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-01 17:30:07,201 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:07,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:08,085 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:08,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:30:08,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:08,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:08,092 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:08,123 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:08,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:30:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:08,643 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675978755] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:08,643 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:08,643 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-01 17:30:08,643 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801797652] [2022-03-01 17:30:08,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:08,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:30:08,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:08,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:30:08,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:30:08,644 INFO L87 Difference]: Start difference. First operand 265 states and 691 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:09,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:09,423 INFO L93 Difference]: Finished difference Result 329 states and 847 transitions. [2022-03-01 17:30:09,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-01 17:30:09,423 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:09,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:09,424 INFO L225 Difference]: With dead ends: 329 [2022-03-01 17:30:09,424 INFO L226 Difference]: Without dead ends: 326 [2022-03-01 17:30:09,424 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=121, Invalid=1139, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:30:09,424 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 15 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 104 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:09,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 21 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 436 Invalid, 0 Unknown, 104 Unchecked, 0.2s Time] [2022-03-01 17:30:09,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-01 17:30:09,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 268. [2022-03-01 17:30:09,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.6217228464419478) internal successors, (700), 267 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:09,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 700 transitions. [2022-03-01 17:30:09,427 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 700 transitions. Word has length 16 [2022-03-01 17:30:09,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:09,427 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 700 transitions. [2022-03-01 17:30:09,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:09,428 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 700 transitions. [2022-03-01 17:30:09,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:09,428 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:09,428 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:09,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (180)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:09,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 180 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2022-03-01 17:30:09,629 INFO L402 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:09,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:09,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1871209727, now seen corresponding path program 176 times [2022-03-01 17:30:09,629 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:09,629 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291173835] [2022-03-01 17:30:09,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:09,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:09,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:10,020 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:10,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291173835] [2022-03-01 17:30:10,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291173835] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:10,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545855522] [2022-03-01 17:30:10,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:30:10,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:10,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:10,021 INFO L229 MonitoredProcess]: Starting monitored process 181 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:10,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Waiting until timeout for monitored process [2022-03-01 17:30:10,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:30:10,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:10,050 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:10,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:10,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:10,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:10,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:10,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:10,707 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:10,712 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:30:10,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 79 [2022-03-01 17:30:10,717 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:30:10,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-01 17:30:10,775 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:10,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:11,679 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:11,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:30:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:11,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:11,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:11,715 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:11,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:30:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:12,085 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545855522] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:12,085 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:12,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-01 17:30:12,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303932778] [2022-03-01 17:30:12,085 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:12,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:30:12,086 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:30:12,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:30:12,086 INFO L87 Difference]: Start difference. First operand 268 states and 700 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:12,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:12,754 INFO L93 Difference]: Finished difference Result 330 states and 847 transitions. [2022-03-01 17:30:12,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-03-01 17:30:12,755 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:12,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:12,755 INFO L225 Difference]: With dead ends: 330 [2022-03-01 17:30:12,755 INFO L226 Difference]: Without dead ends: 328 [2022-03-01 17:30:12,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=115, Invalid=1075, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:30:12,755 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 199 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:12,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 22 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 408 Invalid, 0 Unknown, 199 Unchecked, 0.2s Time] [2022-03-01 17:30:12,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-03-01 17:30:12,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 267. [2022-03-01 17:30:12,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.6203007518796992) internal successors, (697), 266 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:12,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 697 transitions. [2022-03-01 17:30:12,758 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 697 transitions. Word has length 16 [2022-03-01 17:30:12,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:12,759 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 697 transitions. [2022-03-01 17:30:12,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:12,759 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 697 transitions. [2022-03-01 17:30:12,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:12,759 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:12,759 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:12,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (181)] Ended with exit code 0 [2022-03-01 17:30:12,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2022-03-01 17:30:12,960 INFO L402 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:12,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:12,960 INFO L85 PathProgramCache]: Analyzing trace with hash -865412665, now seen corresponding path program 177 times [2022-03-01 17:30:12,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:12,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781861014] [2022-03-01 17:30:12,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:12,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:12,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:13,178 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:13,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781861014] [2022-03-01 17:30:13,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781861014] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:13,178 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614904002] [2022-03-01 17:30:13,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:30:13,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:13,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:13,179 INFO L229 MonitoredProcess]: Starting monitored process 182 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:13,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Waiting until timeout for monitored process [2022-03-01 17:30:13,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:30:13,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:13,204 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:13,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:13,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:13,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:13,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:13,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:13,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:13,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:13,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:13,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:13,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:13,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:14,643 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:14,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:30:14,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:14,647 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:14,649 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:14,678 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:14,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:30:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:15,149 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614904002] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:15,149 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:15,149 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:30:15,149 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714543292] [2022-03-01 17:30:15,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:15,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:15,149 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:15,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:15,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:15,150 INFO L87 Difference]: Start difference. First operand 267 states and 697 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:15,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:15,682 INFO L93 Difference]: Finished difference Result 330 states and 849 transitions. [2022-03-01 17:30:15,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:30:15,683 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:15,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:15,683 INFO L225 Difference]: With dead ends: 330 [2022-03-01 17:30:15,683 INFO L226 Difference]: Without dead ends: 327 [2022-03-01 17:30:15,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:30:15,683 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 384 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:15,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 17 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 384 Invalid, 0 Unknown, 106 Unchecked, 0.2s Time] [2022-03-01 17:30:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-03-01 17:30:15,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 268. [2022-03-01 17:30:15,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.6179775280898876) internal successors, (699), 267 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:15,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 699 transitions. [2022-03-01 17:30:15,686 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 699 transitions. Word has length 16 [2022-03-01 17:30:15,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:15,686 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 699 transitions. [2022-03-01 17:30:15,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:15,687 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 699 transitions. [2022-03-01 17:30:15,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:15,687 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:15,687 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:15,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (182)] Ended with exit code 0 [2022-03-01 17:30:15,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 182 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2022-03-01 17:30:15,890 INFO L402 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:15,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:15,890 INFO L85 PathProgramCache]: Analyzing trace with hash -694710235, now seen corresponding path program 178 times [2022-03-01 17:30:15,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:15,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525808034] [2022-03-01 17:30:15,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:15,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:16,156 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:16,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525808034] [2022-03-01 17:30:16,156 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525808034] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:16,156 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667405152] [2022-03-01 17:30:16,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:30:16,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:16,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:16,157 INFO L229 MonitoredProcess]: Starting monitored process 183 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:16,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Waiting until timeout for monitored process [2022-03-01 17:30:16,187 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:30:16,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:16,188 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:16,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:16,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:16,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:16,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:16,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:16,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:16,836 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:16,836 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:16,839 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:16,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:16,874 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:16,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:17,747 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:17,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:30:17,751 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:17,752 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:17,753 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:17,783 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:17,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:30:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:18,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667405152] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:18,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:18,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:30:18,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397214862] [2022-03-01 17:30:18,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:18,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:18,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:18,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:18,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:18,199 INFO L87 Difference]: Start difference. First operand 268 states and 699 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:18,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:18,751 INFO L93 Difference]: Finished difference Result 336 states and 858 transitions. [2022-03-01 17:30:18,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:30:18,751 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:18,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:18,752 INFO L225 Difference]: With dead ends: 336 [2022-03-01 17:30:18,752 INFO L226 Difference]: Without dead ends: 333 [2022-03-01 17:30:18,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=129, Invalid=993, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:30:18,752 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 92 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:18,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 12 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 340 Invalid, 0 Unknown, 92 Unchecked, 0.2s Time] [2022-03-01 17:30:18,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-01 17:30:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 267. [2022-03-01 17:30:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.6203007518796992) internal successors, (697), 266 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 697 transitions. [2022-03-01 17:30:18,756 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 697 transitions. Word has length 16 [2022-03-01 17:30:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:18,756 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 697 transitions. [2022-03-01 17:30:18,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 697 transitions. [2022-03-01 17:30:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:18,757 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:18,757 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:18,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (183)] Ended with exit code 0 [2022-03-01 17:30:18,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,183 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:18,963 INFO L402 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:18,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:18,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1195447137, now seen corresponding path program 179 times [2022-03-01 17:30:18,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:18,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797039103] [2022-03-01 17:30:18,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:18,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:18,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:19,192 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:19,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797039103] [2022-03-01 17:30:19,192 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797039103] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:19,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557469489] [2022-03-01 17:30:19,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:30:19,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:19,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:19,193 INFO L229 MonitoredProcess]: Starting monitored process 184 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:19,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Waiting until timeout for monitored process [2022-03-01 17:30:19,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:30:19,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:19,219 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:19,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:19,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:19,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:19,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:19,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:19,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:19,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:19,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:19,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:20,687 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:20,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:30:20,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:20,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:20,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:20,723 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:20,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:30:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:21,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557469489] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:21,141 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:21,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:30:21,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551824555] [2022-03-01 17:30:21,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:21,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:30:21,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:21,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:30:21,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:30:21,142 INFO L87 Difference]: Start difference. First operand 267 states and 697 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:21,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:21,697 INFO L93 Difference]: Finished difference Result 333 states and 853 transitions. [2022-03-01 17:30:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:30:21,697 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:21,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:21,698 INFO L225 Difference]: With dead ends: 333 [2022-03-01 17:30:21,698 INFO L226 Difference]: Without dead ends: 330 [2022-03-01 17:30:21,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:30:21,698 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 181 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:21,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 18 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 487 Invalid, 0 Unknown, 181 Unchecked, 0.3s Time] [2022-03-01 17:30:21,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-01 17:30:21,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 268. [2022-03-01 17:30:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 267 states have (on average 2.6179775280898876) internal successors, (699), 267 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 699 transitions. [2022-03-01 17:30:21,701 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 699 transitions. Word has length 16 [2022-03-01 17:30:21,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:21,701 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 699 transitions. [2022-03-01 17:30:21,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:21,701 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 699 transitions. [2022-03-01 17:30:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:21,702 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:21,702 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:21,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (184)] Ended with exit code 0 [2022-03-01 17:30:21,902 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,184 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:21,902 INFO L402 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:21,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:21,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1233665217, now seen corresponding path program 180 times [2022-03-01 17:30:21,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:21,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84884716] [2022-03-01 17:30:21,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:21,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:22,124 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:22,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84884716] [2022-03-01 17:30:22,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84884716] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:22,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170635950] [2022-03-01 17:30:22,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:30:22,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:22,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:22,126 INFO L229 MonitoredProcess]: Starting monitored process 185 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:22,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Waiting until timeout for monitored process [2022-03-01 17:30:22,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:30:22,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:22,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 17:30:22,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:22,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:22,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:22,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:22,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:22,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:22,868 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:22,868 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:22,870 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:22,870 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:22,909 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:22,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:23,899 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:23,900 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:23,902 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:23,941 INFO L353 Elim1Store]: treesize reduction 46, result has 49.5 percent of original size [2022-03-01 17:30:23,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 250 treesize of output 238 [2022-03-01 17:30:23,950 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:23,951 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:23,952 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:23,983 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:23,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 248 [2022-03-01 17:30:24,615 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:24,616 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170635950] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:24,616 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:24,616 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-01 17:30:24,616 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723888975] [2022-03-01 17:30:24,616 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:24,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:30:24,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:24,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:30:24,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:30:24,616 INFO L87 Difference]: Start difference. First operand 268 states and 699 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:26,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:26,349 INFO L93 Difference]: Finished difference Result 383 states and 963 transitions. [2022-03-01 17:30:26,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:30:26,349 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:26,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:26,350 INFO L225 Difference]: With dead ends: 383 [2022-03-01 17:30:26,350 INFO L226 Difference]: Without dead ends: 380 [2022-03-01 17:30:26,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=204, Invalid=1436, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:30:26,350 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 90 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 142 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:26,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 15 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 472 Invalid, 0 Unknown, 142 Unchecked, 0.3s Time] [2022-03-01 17:30:26,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-03-01 17:30:26,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 264. [2022-03-01 17:30:26,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.6273764258555135) internal successors, (691), 263 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:26,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 691 transitions. [2022-03-01 17:30:26,353 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 691 transitions. Word has length 16 [2022-03-01 17:30:26,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:26,353 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 691 transitions. [2022-03-01 17:30:26,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:26,353 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 691 transitions. [2022-03-01 17:30:26,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:26,354 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:26,354 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:26,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (185)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:26,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,185 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:26,554 INFO L402 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:26,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1098862525, now seen corresponding path program 181 times [2022-03-01 17:30:26,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:26,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625070974] [2022-03-01 17:30:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:26,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:26,748 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:26,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625070974] [2022-03-01 17:30:26,748 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625070974] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:26,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649916743] [2022-03-01 17:30:26,748 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:30:26,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:26,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:26,749 INFO L229 MonitoredProcess]: Starting monitored process 186 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:26,749 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Waiting until timeout for monitored process [2022-03-01 17:30:26,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:26,774 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:26,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:27,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:27,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:27,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:27,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-03-01 17:30:27,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:27,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:30:27,356 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:27,356 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:28,385 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:28,385 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 235 treesize of output 223 [2022-03-01 17:30:28,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:28,389 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:28,391 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:28,420 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:28,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 199 treesize of output 233 [2022-03-01 17:30:28,798 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:28,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649916743] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:28,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:28,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:30:28,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857776154] [2022-03-01 17:30:28,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:28,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:30:28,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:28,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:30:28,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:30:28,799 INFO L87 Difference]: Start difference. First operand 264 states and 691 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:30,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:30,169 INFO L93 Difference]: Finished difference Result 371 states and 908 transitions. [2022-03-01 17:30:30,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:30:30,169 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:30,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:30,170 INFO L225 Difference]: With dead ends: 371 [2022-03-01 17:30:30,170 INFO L226 Difference]: Without dead ends: 366 [2022-03-01 17:30:30,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:30:30,170 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 835 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 835 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:30,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 47 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 835 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:30:30,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-03-01 17:30:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 271. [2022-03-01 17:30:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 2.651851851851852) internal successors, (716), 270 states have internal predecessors, (716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 716 transitions. [2022-03-01 17:30:30,174 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 716 transitions. Word has length 16 [2022-03-01 17:30:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:30,174 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 716 transitions. [2022-03-01 17:30:30,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:30,174 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 716 transitions. [2022-03-01 17:30:30,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:30,174 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:30,174 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:30,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (186)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:30,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,186 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:30,378 INFO L402 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:30,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1091132127, now seen corresponding path program 182 times [2022-03-01 17:30:30,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:30,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536102949] [2022-03-01 17:30:30,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:30,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:30,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:30,761 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:30,761 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:30,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536102949] [2022-03-01 17:30:30,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536102949] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:30,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868984733] [2022-03-01 17:30:30,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:30:30,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:30,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:30,763 INFO L229 MonitoredProcess]: Starting monitored process 187 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:30,764 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Waiting until timeout for monitored process [2022-03-01 17:30:30,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:30:30,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:30,794 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:30,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:31,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:31,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:31,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:31,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:31,389 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:30:31,389 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 79 [2022-03-01 17:30:31,395 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:30:31,395 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-01 17:30:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:31,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:32,558 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:32,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 245 treesize of output 237 [2022-03-01 17:30:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:32,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:32,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:32,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:32,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 213 treesize of output 251 [2022-03-01 17:30:33,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:33,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868984733] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:33,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:33,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:30:33,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235183267] [2022-03-01 17:30:33,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:33,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:33,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:33,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:33,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:33,073 INFO L87 Difference]: Start difference. First operand 271 states and 716 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:34,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:34,440 INFO L93 Difference]: Finished difference Result 340 states and 853 transitions. [2022-03-01 17:30:34,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:30:34,441 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:34,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:34,442 INFO L225 Difference]: With dead ends: 340 [2022-03-01 17:30:34,442 INFO L226 Difference]: Without dead ends: 333 [2022-03-01 17:30:34,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:30:34,442 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 63 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:34,442 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 33 Invalid, 751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 617 Invalid, 0 Unknown, 103 Unchecked, 0.4s Time] [2022-03-01 17:30:34,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-03-01 17:30:34,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 275. [2022-03-01 17:30:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.664233576642336) internal successors, (730), 274 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:34,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 730 transitions. [2022-03-01 17:30:34,445 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 730 transitions. Word has length 16 [2022-03-01 17:30:34,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:34,445 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 730 transitions. [2022-03-01 17:30:34,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 730 transitions. [2022-03-01 17:30:34,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:34,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:34,446 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:34,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (187)] Ended with exit code 0 [2022-03-01 17:30:34,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,187 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:34,646 INFO L402 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:34,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:34,646 INFO L85 PathProgramCache]: Analyzing trace with hash -973015937, now seen corresponding path program 183 times [2022-03-01 17:30:34,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:34,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243262578] [2022-03-01 17:30:34,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:34,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:35,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:35,069 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:35,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243262578] [2022-03-01 17:30:35,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243262578] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:35,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567969774] [2022-03-01 17:30:35,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:30:35,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:35,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:35,074 INFO L229 MonitoredProcess]: Starting monitored process 188 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:35,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Waiting until timeout for monitored process [2022-03-01 17:30:35,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:30:35,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:35,103 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:35,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:35,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:35,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:35,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:35,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:35,669 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:35,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:35,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:35,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:35,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:36,741 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:36,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 252 treesize of output 244 [2022-03-01 17:30:36,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:36,745 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:36,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:36,777 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:36,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 258 [2022-03-01 17:30:37,299 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:37,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [567969774] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:37,300 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:37,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:30:37,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432685577] [2022-03-01 17:30:37,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:37,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:37,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:37,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:37,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:37,300 INFO L87 Difference]: Start difference. First operand 275 states and 730 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:38,213 INFO L93 Difference]: Finished difference Result 332 states and 853 transitions. [2022-03-01 17:30:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:30:38,213 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:38,213 INFO L225 Difference]: With dead ends: 332 [2022-03-01 17:30:38,214 INFO L226 Difference]: Without dead ends: 324 [2022-03-01 17:30:38,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:30:38,214 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:38,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 12 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 409 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2022-03-01 17:30:38,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2022-03-01 17:30:38,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 279. [2022-03-01 17:30:38,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2022-03-01 17:30:38,217 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 16 [2022-03-01 17:30:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:38,217 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2022-03-01 17:30:38,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:38,217 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2022-03-01 17:30:38,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:38,217 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:38,217 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:38,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (188)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:38,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,188 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:38,418 INFO L402 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:38,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:38,419 INFO L85 PathProgramCache]: Analyzing trace with hash -802313507, now seen corresponding path program 184 times [2022-03-01 17:30:38,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:38,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838383555] [2022-03-01 17:30:38,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:38,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:38,737 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:38,737 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:38,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838383555] [2022-03-01 17:30:38,737 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838383555] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:38,737 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011390507] [2022-03-01 17:30:38,737 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:30:38,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:38,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:38,738 INFO L229 MonitoredProcess]: Starting monitored process 189 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:38,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Waiting until timeout for monitored process [2022-03-01 17:30:38,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:30:38,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:38,764 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:38,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:39,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:39,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:39,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:39,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:39,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:39,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:39,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:39,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:39,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:40,456 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:40,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 252 treesize of output 244 [2022-03-01 17:30:40,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:40,460 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:40,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:40,492 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:40,492 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 258 [2022-03-01 17:30:41,024 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:41,025 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011390507] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:41,025 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:41,025 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:30:41,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110215730] [2022-03-01 17:30:41,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:41,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:41,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:41,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:41,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=530, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:41,026 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:41,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:41,984 INFO L93 Difference]: Finished difference Result 330 states and 845 transitions. [2022-03-01 17:30:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:30:41,985 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:41,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:41,985 INFO L225 Difference]: With dead ends: 330 [2022-03-01 17:30:41,985 INFO L226 Difference]: Without dead ends: 326 [2022-03-01 17:30:41,985 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=152, Invalid=1038, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:30:41,985 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 16 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 86 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:41,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 20 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 565 Invalid, 0 Unknown, 86 Unchecked, 0.3s Time] [2022-03-01 17:30:41,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-03-01 17:30:41,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 279. [2022-03-01 17:30:41,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:41,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2022-03-01 17:30:41,992 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 16 [2022-03-01 17:30:41,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:41,992 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2022-03-01 17:30:41,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:41,993 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2022-03-01 17:30:41,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:41,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:41,993 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:42,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (189)] Ended with exit code 0 [2022-03-01 17:30:42,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,189 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:42,193 INFO L402 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:42,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:42,194 INFO L85 PathProgramCache]: Analyzing trace with hash 756031397, now seen corresponding path program 185 times [2022-03-01 17:30:42,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:42,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133067906] [2022-03-01 17:30:42,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:42,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:42,434 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:42,434 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:42,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133067906] [2022-03-01 17:30:42,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133067906] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:42,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981039948] [2022-03-01 17:30:42,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:30:42,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:42,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:42,436 INFO L229 MonitoredProcess]: Starting monitored process 190 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:42,436 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Waiting until timeout for monitored process [2022-03-01 17:30:42,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:30:42,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:42,461 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:42,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:43,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:43,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:43,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:43,011 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:43,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:43,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:43,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:43,014 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:43,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:43,053 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:44,032 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:44,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:30:44,038 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:44,039 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:44,041 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:44,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:44,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:30:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:44,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981039948] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:44,492 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:44,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:30:44,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251096749] [2022-03-01 17:30:44,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:44,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:44,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:44,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:44,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:44,493 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:45,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:45,354 INFO L93 Difference]: Finished difference Result 338 states and 863 transitions. [2022-03-01 17:30:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:30:45,354 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:45,355 INFO L225 Difference]: With dead ends: 338 [2022-03-01 17:30:45,355 INFO L226 Difference]: Without dead ends: 332 [2022-03-01 17:30:45,355 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:30:45,355 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:45,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 17 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 545 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-03-01 17:30:45,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-03-01 17:30:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 280. [2022-03-01 17:30:45,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 2.6666666666666665) internal successors, (744), 279 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:45,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 744 transitions. [2022-03-01 17:30:45,358 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 744 transitions. Word has length 16 [2022-03-01 17:30:45,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:45,358 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 744 transitions. [2022-03-01 17:30:45,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:45,358 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 744 transitions. [2022-03-01 17:30:45,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:45,358 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:45,358 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:45,374 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (190)] Ended with exit code 0 [2022-03-01 17:30:45,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,190 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:45,559 INFO L402 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:45,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:45,559 INFO L85 PathProgramCache]: Analyzing trace with hash 926733827, now seen corresponding path program 186 times [2022-03-01 17:30:45,559 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:45,559 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140749382] [2022-03-01 17:30:45,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:45,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:45,789 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:45,789 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:45,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140749382] [2022-03-01 17:30:45,789 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140749382] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:45,789 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77263540] [2022-03-01 17:30:45,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:30:45,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:45,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:45,791 INFO L229 MonitoredProcess]: Starting monitored process 191 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:45,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Waiting until timeout for monitored process [2022-03-01 17:30:45,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:30:45,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:45,815 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:45,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:46,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:46,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:46,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:46,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:46,412 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:46,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:46,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:46,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:46,439 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:46,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:47,435 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:47,436 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:30:47,439 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:47,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:47,442 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:47,471 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:47,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:30:47,903 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:47,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77263540] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:47,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:47,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:30:47,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203103608] [2022-03-01 17:30:47,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:47,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:47,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:47,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:47,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:47,904 INFO L87 Difference]: Start difference. First operand 280 states and 744 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:48,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:48,643 INFO L93 Difference]: Finished difference Result 334 states and 853 transitions. [2022-03-01 17:30:48,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:30:48,644 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:48,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:48,644 INFO L225 Difference]: With dead ends: 334 [2022-03-01 17:30:48,644 INFO L226 Difference]: Without dead ends: 330 [2022-03-01 17:30:48,644 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:30:48,644 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:48,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 16 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 374 Invalid, 0 Unknown, 81 Unchecked, 0.2s Time] [2022-03-01 17:30:48,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-03-01 17:30:48,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 279. [2022-03-01 17:30:48,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2022-03-01 17:30:48,647 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 16 [2022-03-01 17:30:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:48,647 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2022-03-01 17:30:48,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2022-03-01 17:30:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:48,648 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:48,648 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:48,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (191)] Ended with exit code 0 [2022-03-01 17:30:48,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2022-03-01 17:30:48,848 INFO L402 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:48,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1785013711, now seen corresponding path program 187 times [2022-03-01 17:30:48,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:48,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013919084] [2022-03-01 17:30:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:48,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:49,083 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:49,083 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:49,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013919084] [2022-03-01 17:30:49,083 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013919084] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:49,083 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308687511] [2022-03-01 17:30:49,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:30:49,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:49,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:49,084 INFO L229 MonitoredProcess]: Starting monitored process 192 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:49,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Waiting until timeout for monitored process [2022-03-01 17:30:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:49,110 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:49,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:49,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:49,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:49,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:49,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:49,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:49,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:49,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:49,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:49,744 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:49,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:50,743 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:50,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:30:50,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:50,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:50,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:50,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:50,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:30:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:51,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308687511] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:51,119 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:51,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:30:51,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731259709] [2022-03-01 17:30:51,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:51,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:51,119 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:51,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:51,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:51,120 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:51,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:51,961 INFO L93 Difference]: Finished difference Result 339 states and 858 transitions. [2022-03-01 17:30:51,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:30:51,961 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:51,962 INFO L225 Difference]: With dead ends: 339 [2022-03-01 17:30:51,962 INFO L226 Difference]: Without dead ends: 335 [2022-03-01 17:30:51,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=157, Invalid=1033, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:30:51,962 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 40 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:51,962 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 15 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 503 Invalid, 0 Unknown, 106 Unchecked, 0.3s Time] [2022-03-01 17:30:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-03-01 17:30:51,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 279. [2022-03-01 17:30:51,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 278 states have (on average 2.6690647482014387) internal successors, (742), 278 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:51,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 742 transitions. [2022-03-01 17:30:51,965 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 742 transitions. Word has length 16 [2022-03-01 17:30:51,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:51,966 INFO L470 AbstractCegarLoop]: Abstraction has 279 states and 742 transitions. [2022-03-01 17:30:51,966 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:51,966 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 742 transitions. [2022-03-01 17:30:51,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:51,966 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:51,966 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:51,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (192)] Forceful destruction successful, exit code 0 [2022-03-01 17:30:52,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,192 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:52,167 INFO L402 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:52,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:52,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1507451743, now seen corresponding path program 188 times [2022-03-01 17:30:52,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:52,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942271111] [2022-03-01 17:30:52,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:52,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:52,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:52,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:52,418 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:52,418 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942271111] [2022-03-01 17:30:52,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942271111] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:52,419 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380383065] [2022-03-01 17:30:52,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:30:52,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:52,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:52,420 INFO L229 MonitoredProcess]: Starting monitored process 193 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:52,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Waiting until timeout for monitored process [2022-03-01 17:30:52,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:30:52,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:52,445 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:52,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:52,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:52,960 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:52,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:52,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:52,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:30:52,962 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:52,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:30:52,965 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:52,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:30:53,012 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:53,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:53,919 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:53,919 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:30:53,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:53,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:53,926 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:53,955 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:53,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:30:54,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:54,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380383065] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:54,335 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:54,335 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:30:54,335 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212880918] [2022-03-01 17:30:54,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:54,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:30:54,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:54,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:30:54,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:30:54,335 INFO L87 Difference]: Start difference. First operand 279 states and 742 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:55,257 INFO L93 Difference]: Finished difference Result 362 states and 907 transitions. [2022-03-01 17:30:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:30:55,257 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:55,257 INFO L225 Difference]: With dead ends: 362 [2022-03-01 17:30:55,257 INFO L226 Difference]: Without dead ends: 356 [2022-03-01 17:30:55,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=143, Invalid=1117, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:30:55,258 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:55,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 29 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 614 Invalid, 0 Unknown, 176 Unchecked, 0.4s Time] [2022-03-01 17:30:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2022-03-01 17:30:55,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 288. [2022-03-01 17:30:55,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 2.662020905923345) internal successors, (764), 287 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:55,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 764 transitions. [2022-03-01 17:30:55,261 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 764 transitions. Word has length 16 [2022-03-01 17:30:55,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:55,261 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 764 transitions. [2022-03-01 17:30:55,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:55,261 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 764 transitions. [2022-03-01 17:30:55,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:55,262 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:55,262 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:55,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (193)] Ended with exit code 0 [2022-03-01 17:30:55,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2022-03-01 17:30:55,462 INFO L402 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:55,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:55,462 INFO L85 PathProgramCache]: Analyzing trace with hash -2116926575, now seen corresponding path program 189 times [2022-03-01 17:30:55,462 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:55,462 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442670767] [2022-03-01 17:30:55,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:55,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:55,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:55,576 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:55,577 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:55,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442670767] [2022-03-01 17:30:55,577 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442670767] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:55,577 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490637998] [2022-03-01 17:30:55,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:30:55,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:55,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:55,578 INFO L229 MonitoredProcess]: Starting monitored process 194 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:55,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Waiting until timeout for monitored process [2022-03-01 17:30:55,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:30:55,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:55,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2022-03-01 17:30:55,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:55,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:55,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:30:55,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:55,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:30:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:55,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:56,057 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:30:56,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:30:56,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:30:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:56,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490637998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:56,069 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:56,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-03-01 17:30:56,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323737068] [2022-03-01 17:30:56,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:56,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:30:56,070 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:56,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:30:56,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:30:56,070 INFO L87 Difference]: Start difference. First operand 288 states and 764 transitions. Second operand has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:56,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:30:56,358 INFO L93 Difference]: Finished difference Result 345 states and 883 transitions. [2022-03-01 17:30:56,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:30:56,358 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:30:56,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:30:56,358 INFO L225 Difference]: With dead ends: 345 [2022-03-01 17:30:56,358 INFO L226 Difference]: Without dead ends: 345 [2022-03-01 17:30:56,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=854, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:30:56,359 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 35 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:30:56,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 24 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 270 Invalid, 0 Unknown, 87 Unchecked, 0.1s Time] [2022-03-01 17:30:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-03-01 17:30:56,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 286. [2022-03-01 17:30:56,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 2.663157894736842) internal successors, (759), 285 states have internal predecessors, (759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 759 transitions. [2022-03-01 17:30:56,362 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 759 transitions. Word has length 16 [2022-03-01 17:30:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:30:56,362 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 759 transitions. [2022-03-01 17:30:56,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:30:56,362 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 759 transitions. [2022-03-01 17:30:56,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:30:56,362 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:30:56,362 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:30:56,378 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (194)] Ended with exit code 0 [2022-03-01 17:30:56,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2022-03-01 17:30:56,563 INFO L402 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:30:56,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:30:56,563 INFO L85 PathProgramCache]: Analyzing trace with hash 608535423, now seen corresponding path program 190 times [2022-03-01 17:30:56,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:30:56,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227740467] [2022-03-01 17:30:56,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:30:56,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:30:56,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:30:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:56,830 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:30:56,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227740467] [2022-03-01 17:30:56,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227740467] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:30:56,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659015413] [2022-03-01 17:30:56,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:30:56,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:30:56,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:30:56,832 INFO L229 MonitoredProcess]: Starting monitored process 195 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:30:56,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Waiting until timeout for monitored process [2022-03-01 17:30:56,856 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:30:56,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:30:56,857 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:30:56,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:30:57,367 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:57,367 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-03-01 17:30:57,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:57,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:30:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:57,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:30:58,420 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:30:58,420 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 235 treesize of output 223 [2022-03-01 17:30:58,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:58,425 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:58,427 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:30:58,456 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:30:58,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 199 treesize of output 233 [2022-03-01 17:30:58,864 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:30:58,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659015413] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:30:58,864 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:30:58,864 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:30:58,864 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040054162] [2022-03-01 17:30:58,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:30:58,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:30:58,864 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:30:58,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:30:58,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:30:58,864 INFO L87 Difference]: Start difference. First operand 286 states and 759 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:01,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:01,948 INFO L93 Difference]: Finished difference Result 397 states and 969 transitions. [2022-03-01 17:31:01,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:31:01,949 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:01,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:01,949 INFO L225 Difference]: With dead ends: 397 [2022-03-01 17:31:01,949 INFO L226 Difference]: Without dead ends: 388 [2022-03-01 17:31:01,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=255, Invalid=1725, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:31:01,950 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 72 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 773 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 773 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:01,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 52 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 773 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:31:01,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-03-01 17:31:01,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 305. [2022-03-01 17:31:01,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 2.6907894736842106) internal successors, (818), 304 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:01,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 818 transitions. [2022-03-01 17:31:01,953 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 818 transitions. Word has length 16 [2022-03-01 17:31:01,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:01,953 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 818 transitions. [2022-03-01 17:31:01,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:01,953 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 818 transitions. [2022-03-01 17:31:01,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:01,954 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:01,954 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:01,969 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (195)] Forceful destruction successful, exit code 0 [2022-03-01 17:31:02,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2022-03-01 17:31:02,154 INFO L402 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:02,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:02,154 INFO L85 PathProgramCache]: Analyzing trace with hash 855908159, now seen corresponding path program 191 times [2022-03-01 17:31:02,154 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:02,154 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071171439] [2022-03-01 17:31:02,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:02,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:02,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:02,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:02,364 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:02,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071171439] [2022-03-01 17:31:02,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071171439] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:02,364 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061658960] [2022-03-01 17:31:02,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:31:02,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:02,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:02,365 INFO L229 MonitoredProcess]: Starting monitored process 196 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:02,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Waiting until timeout for monitored process [2022-03-01 17:31:02,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:31:02,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:02,391 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:02,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:02,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:02,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:02,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:02,935 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:02,935 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2022-03-01 17:31:02,937 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:02,937 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:31:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:02,987 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:04,013 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:31:04,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:31:04,017 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:04,018 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:04,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:04,049 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:04,049 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:31:04,371 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:04,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061658960] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:04,371 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:04,371 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2022-03-01 17:31:04,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815576950] [2022-03-01 17:31:04,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:04,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:31:04,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:04,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:31:04,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:31:04,372 INFO L87 Difference]: Start difference. First operand 305 states and 818 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:05,213 INFO L93 Difference]: Finished difference Result 350 states and 906 transitions. [2022-03-01 17:31:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:31:05,213 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:05,214 INFO L225 Difference]: With dead ends: 350 [2022-03-01 17:31:05,214 INFO L226 Difference]: Without dead ends: 346 [2022-03-01 17:31:05,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=182, Invalid=1078, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:31:05,214 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 33 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 8 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:05,214 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 27 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 522 Invalid, 0 Unknown, 8 Unchecked, 0.3s Time] [2022-03-01 17:31:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-03-01 17:31:05,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 307. [2022-03-01 17:31:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 2.696078431372549) internal successors, (825), 306 states have internal predecessors, (825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 825 transitions. [2022-03-01 17:31:05,217 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 825 transitions. Word has length 16 [2022-03-01 17:31:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:05,218 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 825 transitions. [2022-03-01 17:31:05,218 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 825 transitions. [2022-03-01 17:31:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:05,218 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:05,218 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:05,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (196)] Ended with exit code 0 [2022-03-01 17:31:05,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2022-03-01 17:31:05,419 INFO L402 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:05,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1831537951, now seen corresponding path program 192 times [2022-03-01 17:31:05,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:05,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462770600] [2022-03-01 17:31:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:05,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:05,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:05,628 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:05,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462770600] [2022-03-01 17:31:05,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462770600] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:05,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511121042] [2022-03-01 17:31:05,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:31:05,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:05,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:05,629 INFO L229 MonitoredProcess]: Starting monitored process 197 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:05,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Waiting until timeout for monitored process [2022-03-01 17:31:05,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:31:05,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:05,654 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:05,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:06,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:06,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:06,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:06,282 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:06,282 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2022-03-01 17:31:06,284 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:06,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:31:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:06,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:07,388 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:31:07,388 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:31:07,393 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:07,394 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:07,396 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:07,433 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:07,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:31:07,914 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:07,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511121042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:07,914 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:07,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:31:07,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468473833] [2022-03-01 17:31:07,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:07,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:07,915 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:07,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:07,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:07,915 INFO L87 Difference]: Start difference. First operand 307 states and 825 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:08,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:08,724 INFO L93 Difference]: Finished difference Result 356 states and 912 transitions. [2022-03-01 17:31:08,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:31:08,724 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:08,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:08,725 INFO L225 Difference]: With dead ends: 356 [2022-03-01 17:31:08,725 INFO L226 Difference]: Without dead ends: 351 [2022-03-01 17:31:08,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:31:08,725 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:08,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 22 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 450 Invalid, 0 Unknown, 11 Unchecked, 0.3s Time] [2022-03-01 17:31:08,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-03-01 17:31:08,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 308. [2022-03-01 17:31:08,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.6938110749185666) internal successors, (827), 307 states have internal predecessors, (827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:08,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 827 transitions. [2022-03-01 17:31:08,728 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 827 transitions. Word has length 16 [2022-03-01 17:31:08,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:08,728 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 827 transitions. [2022-03-01 17:31:08,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 827 transitions. [2022-03-01 17:31:08,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:08,729 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:08,729 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:08,745 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (197)] Ended with exit code 0 [2022-03-01 17:31:08,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,197 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:08,929 INFO L402 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:08,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:08,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1660835521, now seen corresponding path program 193 times [2022-03-01 17:31:08,930 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:08,930 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479174047] [2022-03-01 17:31:08,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:08,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:09,149 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:09,149 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:09,149 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479174047] [2022-03-01 17:31:09,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [479174047] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:09,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870120131] [2022-03-01 17:31:09,150 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:31:09,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:09,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:09,151 INFO L229 MonitoredProcess]: Starting monitored process 198 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:09,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Waiting until timeout for monitored process [2022-03-01 17:31:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:09,175 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:09,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:09,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:09,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:09,817 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:09,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2022-03-01 17:31:09,819 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:09,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:31:09,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:09,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:10,927 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:31:10,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:31:10,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:10,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:10,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:10,964 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:10,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:31:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:11,435 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870120131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:11,435 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:11,435 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:31:11,435 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698984920] [2022-03-01 17:31:11,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:11,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:11,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:11,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:11,436 INFO L87 Difference]: Start difference. First operand 308 states and 827 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:12,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:12,371 INFO L93 Difference]: Finished difference Result 361 states and 913 transitions. [2022-03-01 17:31:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:31:12,371 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:12,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:12,372 INFO L225 Difference]: With dead ends: 361 [2022-03-01 17:31:12,372 INFO L226 Difference]: Without dead ends: 358 [2022-03-01 17:31:12,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=198, Invalid=1208, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:31:12,372 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 63 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 57 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:12,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 37 Invalid, 638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 536 Invalid, 0 Unknown, 57 Unchecked, 0.3s Time] [2022-03-01 17:31:12,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2022-03-01 17:31:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 293. [2022-03-01 17:31:12,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.6780821917808217) internal successors, (782), 292 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:12,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 782 transitions. [2022-03-01 17:31:12,375 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 782 transitions. Word has length 16 [2022-03-01 17:31:12,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:12,375 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 782 transitions. [2022-03-01 17:31:12,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:12,376 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 782 transitions. [2022-03-01 17:31:12,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:12,376 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:12,376 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:12,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (198)] Ended with exit code 0 [2022-03-01 17:31:12,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2022-03-01 17:31:12,576 INFO L402 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:12,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:12,577 INFO L85 PathProgramCache]: Analyzing trace with hash 439588543, now seen corresponding path program 194 times [2022-03-01 17:31:12,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:12,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472152590] [2022-03-01 17:31:12,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:12,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:12,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:12,735 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:12,735 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:12,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472152590] [2022-03-01 17:31:12,735 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472152590] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:12,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286937820] [2022-03-01 17:31:12,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:31:12,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:12,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:12,736 INFO L229 MonitoredProcess]: Starting monitored process 199 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:12,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Waiting until timeout for monitored process [2022-03-01 17:31:12,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:31:12,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:12,762 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:12,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:13,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:13,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:13,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:13,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:13,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:13,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:31:13,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:13,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:31:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:13,331 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:14,302 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:31:14,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:31:14,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:14,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:14,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:14,337 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:14,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:31:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:14,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286937820] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:14,727 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:14,727 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:31:14,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030626548] [2022-03-01 17:31:14,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:14,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:31:14,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:14,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:31:14,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=476, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:31:14,728 INFO L87 Difference]: Start difference. First operand 293 states and 782 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:15,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:15,892 INFO L93 Difference]: Finished difference Result 397 states and 1002 transitions. [2022-03-01 17:31:15,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:31:15,892 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:15,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:15,893 INFO L225 Difference]: With dead ends: 397 [2022-03-01 17:31:15,893 INFO L226 Difference]: Without dead ends: 389 [2022-03-01 17:31:15,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:31:15,893 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 65 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:15,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 38 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 502 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-03-01 17:31:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-03-01 17:31:15,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 315. [2022-03-01 17:31:15,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.7229299363057327) internal successors, (855), 314 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:15,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 855 transitions. [2022-03-01 17:31:15,896 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 855 transitions. Word has length 16 [2022-03-01 17:31:15,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:15,896 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 855 transitions. [2022-03-01 17:31:15,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:15,897 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 855 transitions. [2022-03-01 17:31:15,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:15,897 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:15,897 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:15,913 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (199)] Ended with exit code 0 [2022-03-01 17:31:16,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,199 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:16,097 INFO L402 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:16,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:16,098 INFO L85 PathProgramCache]: Analyzing trace with hash 2047109729, now seen corresponding path program 195 times [2022-03-01 17:31:16,098 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:16,098 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55948709] [2022-03-01 17:31:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:16,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:16,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:16,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55948709] [2022-03-01 17:31:16,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55948709] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:16,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870495702] [2022-03-01 17:31:16,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:31:16,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:16,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:16,355 INFO L229 MonitoredProcess]: Starting monitored process 200 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:16,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Waiting until timeout for monitored process [2022-03-01 17:31:16,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:31:16,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:16,381 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:16,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:16,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:16,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:16,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:16,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:16,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:16,964 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:16,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:31:16,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:16,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:31:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:17,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:18,016 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:31:18,016 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:31:18,019 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:18,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:18,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:18,050 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:18,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:31:18,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:18,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870495702] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:18,417 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:18,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:31:18,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97453944] [2022-03-01 17:31:18,417 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:18,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:31:18,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:18,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:31:18,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:18,418 INFO L87 Difference]: Start difference. First operand 315 states and 855 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:19,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:19,611 INFO L93 Difference]: Finished difference Result 381 states and 976 transitions. [2022-03-01 17:31:19,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:31:19,611 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:19,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:19,611 INFO L225 Difference]: With dead ends: 381 [2022-03-01 17:31:19,612 INFO L226 Difference]: Without dead ends: 378 [2022-03-01 17:31:19,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=176, Invalid=1014, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:31:19,612 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 53 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:19,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 32 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 475 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2022-03-01 17:31:19,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2022-03-01 17:31:19,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 315. [2022-03-01 17:31:19,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.7229299363057327) internal successors, (855), 314 states have internal predecessors, (855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:19,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 855 transitions. [2022-03-01 17:31:19,615 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 855 transitions. Word has length 16 [2022-03-01 17:31:19,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:19,615 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 855 transitions. [2022-03-01 17:31:19,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:19,615 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 855 transitions. [2022-03-01 17:31:19,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:19,616 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:19,616 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:19,632 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (200)] Ended with exit code 0 [2022-03-01 17:31:19,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,200 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:19,816 INFO L402 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:19,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:19,816 INFO L85 PathProgramCache]: Analyzing trace with hash -2077155137, now seen corresponding path program 196 times [2022-03-01 17:31:19,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:19,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697150348] [2022-03-01 17:31:19,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:19,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:20,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:20,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:20,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697150348] [2022-03-01 17:31:20,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697150348] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:20,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355205870] [2022-03-01 17:31:20,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:31:20,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:20,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:20,085 INFO L229 MonitoredProcess]: Starting monitored process 201 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:20,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Waiting until timeout for monitored process [2022-03-01 17:31:20,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:31:20,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:20,111 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:20,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:20,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:20,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:20,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:20,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:20,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:20,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:20,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:31:20,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:20,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:31:20,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:20,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:21,803 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:31:21,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 228 treesize of output 220 [2022-03-01 17:31:21,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:21,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:21,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:21,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:21,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 196 treesize of output 234 [2022-03-01 17:31:22,336 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:22,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355205870] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:22,337 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:22,337 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:31:22,337 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677307054] [2022-03-01 17:31:22,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:22,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:31:22,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:22,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:31:22,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:22,337 INFO L87 Difference]: Start difference. First operand 315 states and 855 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:23,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:23,750 INFO L93 Difference]: Finished difference Result 433 states and 1053 transitions. [2022-03-01 17:31:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:31:23,751 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:23,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:23,751 INFO L225 Difference]: With dead ends: 433 [2022-03-01 17:31:23,751 INFO L226 Difference]: Without dead ends: 427 [2022-03-01 17:31:23,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=186, Invalid=1074, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:31:23,752 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 74 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 175 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:23,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 53 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 541 Invalid, 0 Unknown, 175 Unchecked, 0.3s Time] [2022-03-01 17:31:23,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-03-01 17:31:23,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 313. [2022-03-01 17:31:23,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 312 states have (on average 2.71474358974359) internal successors, (847), 312 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 847 transitions. [2022-03-01 17:31:23,755 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 847 transitions. Word has length 16 [2022-03-01 17:31:23,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:23,755 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 847 transitions. [2022-03-01 17:31:23,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 847 transitions. [2022-03-01 17:31:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:23,756 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:23,756 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:23,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (201)] Ended with exit code 0 [2022-03-01 17:31:23,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2022-03-01 17:31:23,956 INFO L402 AbstractCegarLoop]: === Iteration 211 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:23,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash 827171553, now seen corresponding path program 197 times [2022-03-01 17:31:23,957 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:23,957 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826096907] [2022-03-01 17:31:23,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:23,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:24,325 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:24,325 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:24,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826096907] [2022-03-01 17:31:24,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826096907] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:24,325 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510917826] [2022-03-01 17:31:24,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:31:24,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:24,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:24,326 INFO L229 MonitoredProcess]: Starting monitored process 202 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:24,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Waiting until timeout for monitored process [2022-03-01 17:31:24,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:31:24,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:24,352 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:24,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:24,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:24,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:24,909 INFO L353 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-03-01 17:31:24,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 79 [2022-03-01 17:31:24,920 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:31:24,921 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-03-01 17:31:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:24,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:26,060 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:31:26,061 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 235 treesize of output 223 [2022-03-01 17:31:26,064 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:26,065 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:26,067 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:26,095 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:26,096 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 199 treesize of output 233 [2022-03-01 17:31:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:26,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510917826] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:26,443 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:26,443 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-01 17:31:26,444 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609573729] [2022-03-01 17:31:26,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:26,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:31:26,444 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:26,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:31:26,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=624, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:31:26,444 INFO L87 Difference]: Start difference. First operand 313 states and 847 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:28,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:28,742 INFO L93 Difference]: Finished difference Result 480 states and 1189 transitions. [2022-03-01 17:31:28,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:31:28,742 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:28,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:28,743 INFO L225 Difference]: With dead ends: 480 [2022-03-01 17:31:28,743 INFO L226 Difference]: Without dead ends: 474 [2022-03-01 17:31:28,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=212, Invalid=1768, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:31:28,743 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 87 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 975 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 975 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:28,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 78 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 975 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-01 17:31:28,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2022-03-01 17:31:28,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 341. [2022-03-01 17:31:28,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.7529411764705882) internal successors, (936), 340 states have internal predecessors, (936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 936 transitions. [2022-03-01 17:31:28,747 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 936 transitions. Word has length 16 [2022-03-01 17:31:28,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:28,747 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 936 transitions. [2022-03-01 17:31:28,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:28,747 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 936 transitions. [2022-03-01 17:31:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:28,747 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:28,748 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:28,763 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (202)] Ended with exit code 0 [2022-03-01 17:31:28,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,202 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:28,948 INFO L402 AbstractCegarLoop]: === Iteration 212 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:28,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:28,948 INFO L85 PathProgramCache]: Analyzing trace with hash 418582335, now seen corresponding path program 198 times [2022-03-01 17:31:28,948 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:28,948 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737482645] [2022-03-01 17:31:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:28,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:29,196 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:29,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737482645] [2022-03-01 17:31:29,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737482645] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:29,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772627360] [2022-03-01 17:31:29,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:31:29,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:29,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:29,197 INFO L229 MonitoredProcess]: Starting monitored process 203 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:29,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Waiting until timeout for monitored process [2022-03-01 17:31:29,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:31:29,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:29,223 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 17:31:29,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:29,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:29,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:29,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:29,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:29,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:29,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:29,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 95 [2022-03-01 17:31:29,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:29,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 65 [2022-03-01 17:31:30,013 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:30,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:31,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:31,089 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:31,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:31,129 INFO L353 Elim1Store]: treesize reduction 46, result has 49.5 percent of original size [2022-03-01 17:31:31,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 250 treesize of output 238 [2022-03-01 17:31:31,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:31,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:31,136 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:31,167 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:31,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 248 [2022-03-01 17:31:32,282 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:32,283 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772627360] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:32,283 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:32,283 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-03-01 17:31:32,283 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112000325] [2022-03-01 17:31:32,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:32,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:31:32,283 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:32,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:31:32,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:31:32,283 INFO L87 Difference]: Start difference. First operand 341 states and 936 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:38,410 INFO L93 Difference]: Finished difference Result 532 states and 1257 transitions. [2022-03-01 17:31:38,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:31:38,410 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:38,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:38,411 INFO L225 Difference]: With dead ends: 532 [2022-03-01 17:31:38,411 INFO L226 Difference]: Without dead ends: 516 [2022-03-01 17:31:38,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=388, Invalid=2804, Unknown=0, NotChecked=0, Total=3192 [2022-03-01 17:31:38,411 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 128 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 73 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:38,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 65 Invalid, 1150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1048 Invalid, 0 Unknown, 73 Unchecked, 0.7s Time] [2022-03-01 17:31:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2022-03-01 17:31:38,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 358. [2022-03-01 17:31:38,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 2.7675070028011204) internal successors, (988), 357 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 988 transitions. [2022-03-01 17:31:38,415 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 988 transitions. Word has length 16 [2022-03-01 17:31:38,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:38,416 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 988 transitions. [2022-03-01 17:31:38,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:38,416 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 988 transitions. [2022-03-01 17:31:38,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:38,416 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:38,416 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:38,432 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (203)] Ended with exit code 0 [2022-03-01 17:31:38,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2022-03-01 17:31:38,617 INFO L402 AbstractCegarLoop]: === Iteration 213 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1998264259, now seen corresponding path program 199 times [2022-03-01 17:31:38,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:38,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627034271] [2022-03-01 17:31:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:38,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:38,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:39,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:39,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627034271] [2022-03-01 17:31:39,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1627034271] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:39,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086212498] [2022-03-01 17:31:39,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:31:39,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:39,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:39,249 INFO L229 MonitoredProcess]: Starting monitored process 204 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:39,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Waiting until timeout for monitored process [2022-03-01 17:31:39,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:39,273 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:39,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:39,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:39,714 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:39,718 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:31:39,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 90 treesize of output 77 [2022-03-01 17:31:39,723 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:31:39,724 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 55 [2022-03-01 17:31:39,785 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:39,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:40,574 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:31:40,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 283 treesize of output 259 [2022-03-01 17:31:40,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:40,580 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:40,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:40,581 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:40,583 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:40,585 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:40,614 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:40,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 235 treesize of output 271 [2022-03-01 17:31:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:41,207 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086212498] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:41,207 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:41,207 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-01 17:31:41,207 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993014394] [2022-03-01 17:31:41,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:41,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:31:41,208 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:31:41,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:41,208 INFO L87 Difference]: Start difference. First operand 358 states and 988 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:43,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:43,126 INFO L93 Difference]: Finished difference Result 426 states and 1108 transitions. [2022-03-01 17:31:43,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:31:43,126 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:43,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:43,127 INFO L225 Difference]: With dead ends: 426 [2022-03-01 17:31:43,127 INFO L226 Difference]: Without dead ends: 412 [2022-03-01 17:31:43,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=178, Invalid=1544, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:31:43,127 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 35 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:43,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 32 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:31:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2022-03-01 17:31:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 371. [2022-03-01 17:31:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 2.754054054054054) internal successors, (1019), 370 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:43,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 1019 transitions. [2022-03-01 17:31:43,131 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 1019 transitions. Word has length 16 [2022-03-01 17:31:43,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:43,131 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 1019 transitions. [2022-03-01 17:31:43,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 1019 transitions. [2022-03-01 17:31:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:43,132 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:43,132 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:43,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (204)] Ended with exit code 0 [2022-03-01 17:31:43,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2022-03-01 17:31:43,332 INFO L402 AbstractCegarLoop]: === Iteration 214 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash 1084614881, now seen corresponding path program 200 times [2022-03-01 17:31:43,333 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:43,333 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937522079] [2022-03-01 17:31:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:43,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:43,501 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:43,501 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937522079] [2022-03-01 17:31:43,502 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937522079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:43,502 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941119719] [2022-03-01 17:31:43,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:31:43,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:43,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:43,503 INFO L229 MonitoredProcess]: Starting monitored process 205 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:43,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Waiting until timeout for monitored process [2022-03-01 17:31:43,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:31:43,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:43,528 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:43,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:44,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:44,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:44,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:44,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,009 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2022-03-01 17:31:44,010 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,011 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:31:44,042 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:44,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:44,907 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:31:44,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 244 [2022-03-01 17:31:44,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,914 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,918 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:44,945 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:44,945 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 256 [2022-03-01 17:31:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:45,614 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941119719] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:45,614 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:45,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:31:45,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989805379] [2022-03-01 17:31:45,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:45,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:31:45,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:31:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:31:45,615 INFO L87 Difference]: Start difference. First operand 371 states and 1019 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:46,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:46,681 INFO L93 Difference]: Finished difference Result 467 states and 1221 transitions. [2022-03-01 17:31:46,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:31:46,681 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:46,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:46,682 INFO L225 Difference]: With dead ends: 467 [2022-03-01 17:31:46,682 INFO L226 Difference]: Without dead ends: 464 [2022-03-01 17:31:46,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:31:46,683 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:46,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 61 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 556 Invalid, 0 Unknown, 94 Unchecked, 0.3s Time] [2022-03-01 17:31:46,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-03-01 17:31:46,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 405. [2022-03-01 17:31:46,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.8094059405940595) internal successors, (1135), 404 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:46,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1135 transitions. [2022-03-01 17:31:46,687 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1135 transitions. Word has length 16 [2022-03-01 17:31:46,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:46,687 INFO L470 AbstractCegarLoop]: Abstraction has 405 states and 1135 transitions. [2022-03-01 17:31:46,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:46,687 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1135 transitions. [2022-03-01 17:31:46,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:46,688 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:46,688 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:46,704 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (205)] Ended with exit code 0 [2022-03-01 17:31:46,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 205 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2022-03-01 17:31:46,888 INFO L402 AbstractCegarLoop]: === Iteration 215 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:46,889 INFO L85 PathProgramCache]: Analyzing trace with hash -425796323, now seen corresponding path program 201 times [2022-03-01 17:31:46,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:46,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711784708] [2022-03-01 17:31:46,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:46,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:46,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:47,171 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:47,171 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:47,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711784708] [2022-03-01 17:31:47,171 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711784708] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:47,171 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270221468] [2022-03-01 17:31:47,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:31:47,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:47,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:47,172 INFO L229 MonitoredProcess]: Starting monitored process 206 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:47,173 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Waiting until timeout for monitored process [2022-03-01 17:31:47,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:31:47,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:47,198 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:47,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:47,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:47,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:47,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:47,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:47,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:47,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:47,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:31:47,692 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:47,693 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:31:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:47,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:48,557 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:31:48,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 244 [2022-03-01 17:31:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:48,563 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:48,565 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:48,567 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:48,595 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:48,595 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 256 [2022-03-01 17:31:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:49,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270221468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:49,030 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:49,030 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:31:49,030 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509075497] [2022-03-01 17:31:49,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:49,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:31:49,030 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:49,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:31:49,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:31:49,030 INFO L87 Difference]: Start difference. First operand 405 states and 1135 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:50,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:50,418 INFO L93 Difference]: Finished difference Result 546 states and 1459 transitions. [2022-03-01 17:31:50,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:31:50,418 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:50,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:50,419 INFO L225 Difference]: With dead ends: 546 [2022-03-01 17:31:50,419 INFO L226 Difference]: Without dead ends: 540 [2022-03-01 17:31:50,419 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=168, Invalid=1022, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:31:50,419 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 86 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 139 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:50,419 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 51 Invalid, 671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 500 Invalid, 0 Unknown, 139 Unchecked, 0.3s Time] [2022-03-01 17:31:50,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2022-03-01 17:31:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 449. [2022-03-01 17:31:50,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.890625) internal successors, (1295), 448 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:50,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1295 transitions. [2022-03-01 17:31:50,424 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1295 transitions. Word has length 16 [2022-03-01 17:31:50,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:50,425 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1295 transitions. [2022-03-01 17:31:50,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:50,425 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1295 transitions. [2022-03-01 17:31:50,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:50,425 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:50,425 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:50,441 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (206)] Ended with exit code 0 [2022-03-01 17:31:50,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,206 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:50,626 INFO L402 AbstractCegarLoop]: === Iteration 216 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:50,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:50,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1181724863, now seen corresponding path program 202 times [2022-03-01 17:31:50,626 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:50,626 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309963885] [2022-03-01 17:31:50,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:50,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:50,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:50,946 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:50,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:50,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309963885] [2022-03-01 17:31:50,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309963885] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:50,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438638568] [2022-03-01 17:31:50,947 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:31:50,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:50,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:50,952 INFO L229 MonitoredProcess]: Starting monitored process 207 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:50,953 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Waiting until timeout for monitored process [2022-03-01 17:31:50,981 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:31:50,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:50,982 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:50,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:51,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:51,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:51,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:51,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:51,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:51,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:51,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:31:51,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:51,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:31:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:51,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:52,446 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:31:52,446 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 244 [2022-03-01 17:31:52,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:52,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:52,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:52,452 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:52,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:52,457 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:52,484 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:52,484 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 256 [2022-03-01 17:31:52,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:52,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438638568] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:52,978 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:52,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:31:52,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915156982] [2022-03-01 17:31:52,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:52,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:31:52,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:52,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:31:52,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:52,979 INFO L87 Difference]: Start difference. First operand 449 states and 1295 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:54,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:31:54,510 INFO L93 Difference]: Finished difference Result 527 states and 1419 transitions. [2022-03-01 17:31:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:31:54,510 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:31:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:31:54,511 INFO L225 Difference]: With dead ends: 527 [2022-03-01 17:31:54,511 INFO L226 Difference]: Without dead ends: 524 [2022-03-01 17:31:54,511 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:31:54,511 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 87 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:31:54,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 47 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 536 Invalid, 0 Unknown, 69 Unchecked, 0.3s Time] [2022-03-01 17:31:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2022-03-01 17:31:54,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 449. [2022-03-01 17:31:54,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 448 states have (on average 2.890625) internal successors, (1295), 448 states have internal predecessors, (1295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:54,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 1295 transitions. [2022-03-01 17:31:54,516 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 1295 transitions. Word has length 16 [2022-03-01 17:31:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:31:54,517 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 1295 transitions. [2022-03-01 17:31:54,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:31:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 1295 transitions. [2022-03-01 17:31:54,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:31:54,517 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:31:54,517 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:31:54,533 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (207)] Ended with exit code 0 [2022-03-01 17:31:54,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2022-03-01 17:31:54,718 INFO L402 AbstractCegarLoop]: === Iteration 217 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:31:54,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:31:54,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1213492669, now seen corresponding path program 203 times [2022-03-01 17:31:54,718 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:31:54,718 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559893975] [2022-03-01 17:31:54,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:31:54,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:31:54,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:31:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:55,114 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:31:55,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559893975] [2022-03-01 17:31:55,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559893975] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:31:55,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520971664] [2022-03-01 17:31:55,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:31:55,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:31:55,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:31:55,115 INFO L229 MonitoredProcess]: Starting monitored process 208 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:31:55,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Waiting until timeout for monitored process [2022-03-01 17:31:55,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:31:55,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:31:55,141 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:31:55,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:31:55,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:55,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:55,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:31:55,813 INFO L353 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-03-01 17:31:55,813 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 79 [2022-03-01 17:31:55,819 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:31:55,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-01 17:31:55,867 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:55,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:31:56,814 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:31:56,815 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 302 treesize of output 278 [2022-03-01 17:31:56,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:56,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:56,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:56,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:56,830 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:31:56,858 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:31:56,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 254 treesize of output 290 [2022-03-01 17:31:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:31:57,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520971664] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:31:57,548 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:31:57,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-01 17:31:57,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234177241] [2022-03-01 17:31:57,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:31:57,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:31:57,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:31:57,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:31:57,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:31:57,548 INFO L87 Difference]: Start difference. First operand 449 states and 1295 transitions. Second operand has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:00,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:00,020 INFO L93 Difference]: Finished difference Result 577 states and 1547 transitions. [2022-03-01 17:32:00,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:32:00,020 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:00,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:00,021 INFO L225 Difference]: With dead ends: 577 [2022-03-01 17:32:00,021 INFO L226 Difference]: Without dead ends: 569 [2022-03-01 17:32:00,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=205, Invalid=1517, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:32:00,021 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 68 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:00,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 81 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 736 Invalid, 0 Unknown, 89 Unchecked, 0.5s Time] [2022-03-01 17:32:00,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-03-01 17:32:00,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 471. [2022-03-01 17:32:00,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.9106382978723406) internal successors, (1368), 470 states have internal predecessors, (1368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:00,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1368 transitions. [2022-03-01 17:32:00,027 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1368 transitions. Word has length 16 [2022-03-01 17:32:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:00,027 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1368 transitions. [2022-03-01 17:32:00,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5) internal successors, (39), 26 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:00,027 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1368 transitions. [2022-03-01 17:32:00,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:00,028 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:00,028 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:00,043 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (208)] Ended with exit code 0 [2022-03-01 17:32:00,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,208 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:00,228 INFO L402 AbstractCegarLoop]: === Iteration 218 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:00,228 INFO L85 PathProgramCache]: Analyzing trace with hash 186049697, now seen corresponding path program 204 times [2022-03-01 17:32:00,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:00,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743410540] [2022-03-01 17:32:00,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:00,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:00,477 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:00,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743410540] [2022-03-01 17:32:00,477 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743410540] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:00,477 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395392335] [2022-03-01 17:32:00,477 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:32:00,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:00,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:00,478 INFO L229 MonitoredProcess]: Starting monitored process 209 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:00,486 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Waiting until timeout for monitored process [2022-03-01 17:32:00,508 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:32:00,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:00,509 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:00,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:00,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:00,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:00,967 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-03-01 17:32:00,969 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:00,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:32:01,011 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:01,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:01,848 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:32:01,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 267 treesize of output 243 [2022-03-01 17:32:01,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:01,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:01,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:01,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:01,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:01,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:01,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:01,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 219 treesize of output 255 [2022-03-01 17:32:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:02,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395392335] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:02,410 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:02,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:32:02,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017198504] [2022-03-01 17:32:02,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:02,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:02,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:02,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=558, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:02,410 INFO L87 Difference]: Start difference. First operand 471 states and 1368 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:04,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:04,376 INFO L93 Difference]: Finished difference Result 602 states and 1640 transitions. [2022-03-01 17:32:04,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:32:04,376 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:04,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:04,377 INFO L225 Difference]: With dead ends: 602 [2022-03-01 17:32:04,377 INFO L226 Difference]: Without dead ends: 596 [2022-03-01 17:32:04,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=191, Invalid=1141, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:32:04,377 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 89 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:04,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 60 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:32:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-03-01 17:32:04,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 502. [2022-03-01 17:32:04,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.9441117764471056) internal successors, (1475), 501 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:04,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1475 transitions. [2022-03-01 17:32:04,383 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1475 transitions. Word has length 16 [2022-03-01 17:32:04,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:04,383 INFO L470 AbstractCegarLoop]: Abstraction has 502 states and 1475 transitions. [2022-03-01 17:32:04,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:04,384 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1475 transitions. [2022-03-01 17:32:04,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:04,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:04,384 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:04,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (209)] Ended with exit code 0 [2022-03-01 17:32:04,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2022-03-01 17:32:04,585 INFO L402 AbstractCegarLoop]: === Iteration 219 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:04,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:04,585 INFO L85 PathProgramCache]: Analyzing trace with hash -3903391, now seen corresponding path program 205 times [2022-03-01 17:32:04,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:04,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972688826] [2022-03-01 17:32:04,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:04,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:04,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:04,865 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:04,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972688826] [2022-03-01 17:32:04,865 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972688826] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:04,865 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243924731] [2022-03-01 17:32:04,865 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:32:04,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:04,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:04,866 INFO L229 MonitoredProcess]: Starting monitored process 210 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:04,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Waiting until timeout for monitored process [2022-03-01 17:32:04,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:04,891 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:04,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:05,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:05,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:05,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:05,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:05,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:05,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:05,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:05,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:05,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:05,418 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:05,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:06,179 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:32:06,180 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 244 [2022-03-01 17:32:06,194 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:06,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:06,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:06,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:06,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:06,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:06,227 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:06,228 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 256 [2022-03-01 17:32:06,617 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:06,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243924731] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:06,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:06,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:32:06,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412689140] [2022-03-01 17:32:06,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:06,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:32:06,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:06,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:32:06,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:06,618 INFO L87 Difference]: Start difference. First operand 502 states and 1475 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:08,001 INFO L93 Difference]: Finished difference Result 691 states and 1845 transitions. [2022-03-01 17:32:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:32:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:08,003 INFO L225 Difference]: With dead ends: 691 [2022-03-01 17:32:08,003 INFO L226 Difference]: Without dead ends: 681 [2022-03-01 17:32:08,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:32:08,003 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 114 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 269 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:08,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 65 Invalid, 828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 534 Invalid, 0 Unknown, 269 Unchecked, 0.3s Time] [2022-03-01 17:32:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2022-03-01 17:32:08,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 536. [2022-03-01 17:32:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 535 states have (on average 2.9738317757009347) internal successors, (1591), 535 states have internal predecessors, (1591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:08,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 1591 transitions. [2022-03-01 17:32:08,010 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 1591 transitions. Word has length 16 [2022-03-01 17:32:08,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:08,010 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 1591 transitions. [2022-03-01 17:32:08,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:08,010 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 1591 transitions. [2022-03-01 17:32:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:08,010 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:08,010 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:08,026 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (210)] Ended with exit code 0 [2022-03-01 17:32:08,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,210 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:08,211 INFO L402 AbstractCegarLoop]: === Iteration 220 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash 439009595, now seen corresponding path program 206 times [2022-03-01 17:32:08,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:08,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841534862] [2022-03-01 17:32:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:08,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:08,803 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:08,803 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:08,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841534862] [2022-03-01 17:32:08,803 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841534862] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:08,803 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253945162] [2022-03-01 17:32:08,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:32:08,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:08,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:08,804 INFO L229 MonitoredProcess]: Starting monitored process 211 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:08,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Waiting until timeout for monitored process [2022-03-01 17:32:08,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:32:08,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:08,829 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:08,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:09,412 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:09,413 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:09,414 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:09,415 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:09,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:09,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:09,418 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:09,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:09,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:10,370 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:10,371 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-03-01 17:32:10,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:10,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:10,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:10,406 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:10,406 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-03-01 17:32:10,812 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:10,812 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253945162] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:10,812 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:10,812 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 27 [2022-03-01 17:32:10,812 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819498623] [2022-03-01 17:32:10,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:10,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:32:10,812 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:10,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:32:10,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=634, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:32:10,813 INFO L87 Difference]: Start difference. First operand 536 states and 1591 transitions. Second operand has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:11,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:11,944 INFO L93 Difference]: Finished difference Result 656 states and 1882 transitions. [2022-03-01 17:32:11,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:32:11,945 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:11,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:11,946 INFO L225 Difference]: With dead ends: 656 [2022-03-01 17:32:11,946 INFO L226 Difference]: Without dead ends: 653 [2022-03-01 17:32:11,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:32:11,946 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 216 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:11,946 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 43 Invalid, 834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 616 Invalid, 0 Unknown, 216 Unchecked, 0.3s Time] [2022-03-01 17:32:11,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-03-01 17:32:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 538. [2022-03-01 17:32:11,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 538 states, 537 states have (on average 2.9702048417132216) internal successors, (1595), 537 states have internal predecessors, (1595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:11,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1595 transitions. [2022-03-01 17:32:11,955 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1595 transitions. Word has length 16 [2022-03-01 17:32:11,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:11,955 INFO L470 AbstractCegarLoop]: Abstraction has 538 states and 1595 transitions. [2022-03-01 17:32:11,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1595 transitions. [2022-03-01 17:32:11,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:11,956 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:11,956 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:11,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (211)] Forceful destruction successful, exit code 0 [2022-03-01 17:32:12,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2022-03-01 17:32:12,178 INFO L402 AbstractCegarLoop]: === Iteration 221 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:12,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:12,178 INFO L85 PathProgramCache]: Analyzing trace with hash 974239397, now seen corresponding path program 207 times [2022-03-01 17:32:12,178 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:12,178 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207881686] [2022-03-01 17:32:12,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:12,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:12,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:12,413 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:12,413 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:12,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207881686] [2022-03-01 17:32:12,413 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207881686] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:12,413 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49273694] [2022-03-01 17:32:12,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:32:12,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:12,414 INFO L229 MonitoredProcess]: Starting monitored process 212 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:12,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Waiting until timeout for monitored process [2022-03-01 17:32:12,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:32:12,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:12,441 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 17:32:12,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:13,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:13,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:13,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:13,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:13,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:13,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:13,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:13,109 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:13,109 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:13,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:14,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:14,125 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:14,127 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:14,165 INFO L353 Elim1Store]: treesize reduction 46, result has 49.5 percent of original size [2022-03-01 17:32:14,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 249 treesize of output 237 [2022-03-01 17:32:14,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:14,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:14,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:14,204 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:14,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 213 treesize of output 247 [2022-03-01 17:32:14,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:14,837 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49273694] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:14,837 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:14,837 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:32:14,837 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957859213] [2022-03-01 17:32:14,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:14,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:32:14,837 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:14,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:32:14,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:32:14,838 INFO L87 Difference]: Start difference. First operand 538 states and 1595 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:16,789 INFO L93 Difference]: Finished difference Result 721 states and 2076 transitions. [2022-03-01 17:32:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:32:16,790 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:16,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:16,791 INFO L225 Difference]: With dead ends: 721 [2022-03-01 17:32:16,791 INFO L226 Difference]: Without dead ends: 718 [2022-03-01 17:32:16,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=214, Invalid=1508, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:32:16,791 INFO L933 BasicCegarLoop]: 1 mSDtfsCounter, 75 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 766 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 11 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:16,791 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 14 Invalid, 785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 766 Invalid, 0 Unknown, 11 Unchecked, 0.5s Time] [2022-03-01 17:32:16,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 718 states. [2022-03-01 17:32:16,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 718 to 541. [2022-03-01 17:32:16,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.9703703703703703) internal successors, (1604), 540 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1604 transitions. [2022-03-01 17:32:16,798 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1604 transitions. Word has length 16 [2022-03-01 17:32:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:16,798 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1604 transitions. [2022-03-01 17:32:16,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:16,798 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1604 transitions. [2022-03-01 17:32:16,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:16,798 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:16,799 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:16,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (212)] Ended with exit code 0 [2022-03-01 17:32:16,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,212 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:16,999 INFO L402 AbstractCegarLoop]: === Iteration 222 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:16,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:16,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1259868097, now seen corresponding path program 208 times [2022-03-01 17:32:16,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:16,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440909524] [2022-03-01 17:32:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:17,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:17,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:17,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440909524] [2022-03-01 17:32:17,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440909524] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:17,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324273998] [2022-03-01 17:32:17,259 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:32:17,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:17,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:17,260 INFO L229 MonitoredProcess]: Starting monitored process 213 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:17,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Waiting until timeout for monitored process [2022-03-01 17:32:17,284 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:32:17,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:17,284 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:17,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:17,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:17,858 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:17,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:17,859 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:17,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:17,862 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:17,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:17,890 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:17,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:18,743 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:18,743 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-03-01 17:32:18,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:18,747 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:18,749 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:18,779 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:18,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-03-01 17:32:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:19,198 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324273998] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:19,198 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:19,198 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:32:19,198 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204203358] [2022-03-01 17:32:19,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:19,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:32:19,198 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:19,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:32:19,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=533, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:19,199 INFO L87 Difference]: Start difference. First operand 541 states and 1604 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:19,916 INFO L93 Difference]: Finished difference Result 720 states and 2100 transitions. [2022-03-01 17:32:19,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:32:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:19,917 INFO L225 Difference]: With dead ends: 720 [2022-03-01 17:32:19,917 INFO L226 Difference]: Without dead ends: 717 [2022-03-01 17:32:19,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=148, Invalid=1112, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:32:19,917 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:19,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 17 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 498 Invalid, 0 Unknown, 161 Unchecked, 0.3s Time] [2022-03-01 17:32:19,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-03-01 17:32:19,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 541. [2022-03-01 17:32:19,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 540 states have (on average 2.9703703703703703) internal successors, (1604), 540 states have internal predecessors, (1604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:19,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 1604 transitions. [2022-03-01 17:32:19,924 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 1604 transitions. Word has length 16 [2022-03-01 17:32:19,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:19,924 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 1604 transitions. [2022-03-01 17:32:19,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:19,924 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 1604 transitions. [2022-03-01 17:32:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:19,925 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:19,925 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:19,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (213)] Ended with exit code 0 [2022-03-01 17:32:20,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 213 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2022-03-01 17:32:20,125 INFO L402 AbstractCegarLoop]: === Iteration 223 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:20,125 INFO L85 PathProgramCache]: Analyzing trace with hash 469179237, now seen corresponding path program 209 times [2022-03-01 17:32:20,126 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:20,126 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010925365] [2022-03-01 17:32:20,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:20,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:20,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:20,492 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:20,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010925365] [2022-03-01 17:32:20,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010925365] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:20,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99287052] [2022-03-01 17:32:20,492 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:32:20,492 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:20,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:20,493 INFO L229 MonitoredProcess]: Starting monitored process 214 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:20,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Waiting until timeout for monitored process [2022-03-01 17:32:20,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:32:20,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:20,519 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:20,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:21,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:21,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:21,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:21,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:21,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:21,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:21,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:21,084 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:21,084 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:21,113 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:21,969 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:21,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-03-01 17:32:21,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:21,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:21,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:22,004 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:22,004 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-03-01 17:32:22,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:22,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99287052] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:22,387 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:22,387 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:32:22,387 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279520383] [2022-03-01 17:32:22,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:22,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:32:22,388 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:22,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:32:22,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:22,388 INFO L87 Difference]: Start difference. First operand 541 states and 1604 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:23,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:23,118 INFO L93 Difference]: Finished difference Result 657 states and 1899 transitions. [2022-03-01 17:32:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:32:23,118 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:23,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:23,119 INFO L225 Difference]: With dead ends: 657 [2022-03-01 17:32:23,119 INFO L226 Difference]: Without dead ends: 649 [2022-03-01 17:32:23,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=138, Invalid=1122, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:32:23,120 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 145 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:23,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 16 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 449 Invalid, 0 Unknown, 145 Unchecked, 0.3s Time] [2022-03-01 17:32:23,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-03-01 17:32:23,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 542. [2022-03-01 17:32:23,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.9685767097966727) internal successors, (1606), 541 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:23,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1606 transitions. [2022-03-01 17:32:23,126 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1606 transitions. Word has length 16 [2022-03-01 17:32:23,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:23,126 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1606 transitions. [2022-03-01 17:32:23,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:23,126 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1606 transitions. [2022-03-01 17:32:23,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:23,127 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:23,127 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:23,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (214)] Ended with exit code 0 [2022-03-01 17:32:23,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2022-03-01 17:32:23,327 INFO L402 AbstractCegarLoop]: === Iteration 224 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:23,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:23,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1213943779, now seen corresponding path program 210 times [2022-03-01 17:32:23,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:23,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263864285] [2022-03-01 17:32:23,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:23,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:23,543 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:23,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263864285] [2022-03-01 17:32:23,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263864285] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:23,543 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721429872] [2022-03-01 17:32:23,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:32:23,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:23,544 INFO L229 MonitoredProcess]: Starting monitored process 215 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:23,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Waiting until timeout for monitored process [2022-03-01 17:32:23,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:32:23,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:23,570 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 17:32:23,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:24,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:24,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:24,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:24,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:24,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:24,243 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:24,243 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:24,245 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:24,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:24,274 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:24,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:25,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:25,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:25,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:25,372 INFO L353 Elim1Store]: treesize reduction 46, result has 49.5 percent of original size [2022-03-01 17:32:25,372 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 249 treesize of output 237 [2022-03-01 17:32:25,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:25,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:25,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:25,410 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:25,410 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 213 treesize of output 247 [2022-03-01 17:32:25,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:25,920 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721429872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:25,920 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:25,920 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 27 [2022-03-01 17:32:25,920 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417131749] [2022-03-01 17:32:25,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:25,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-01 17:32:25,920 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:25,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-01 17:32:25,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:32:25,921 INFO L87 Difference]: Start difference. First operand 542 states and 1606 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:30,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:30,266 INFO L93 Difference]: Finished difference Result 636 states and 1782 transitions. [2022-03-01 17:32:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:32:30,266 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:30,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:30,267 INFO L225 Difference]: With dead ends: 636 [2022-03-01 17:32:30,267 INFO L226 Difference]: Without dead ends: 630 [2022-03-01 17:32:30,267 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=272, Invalid=1984, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:32:30,267 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 68 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 880 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 880 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:30,267 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 50 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 880 Invalid, 0 Unknown, 129 Unchecked, 0.5s Time] [2022-03-01 17:32:30,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2022-03-01 17:32:30,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 542. [2022-03-01 17:32:30,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 542 states, 541 states have (on average 2.9685767097966727) internal successors, (1606), 541 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:30,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 1606 transitions. [2022-03-01 17:32:30,274 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 1606 transitions. Word has length 16 [2022-03-01 17:32:30,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:30,274 INFO L470 AbstractCegarLoop]: Abstraction has 542 states and 1606 transitions. [2022-03-01 17:32:30,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:30,274 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 1606 transitions. [2022-03-01 17:32:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:30,274 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:30,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:30,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (215)] Ended with exit code 0 [2022-03-01 17:32:30,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 215 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2022-03-01 17:32:30,475 INFO L402 AbstractCegarLoop]: === Iteration 225 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:30,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:30,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1920001403, now seen corresponding path program 211 times [2022-03-01 17:32:30,475 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:30,475 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259356030] [2022-03-01 17:32:30,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:30,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:30,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:30,686 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:30,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259356030] [2022-03-01 17:32:30,686 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259356030] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:30,686 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825529323] [2022-03-01 17:32:30,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:32:30,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:30,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:30,687 INFO L229 MonitoredProcess]: Starting monitored process 216 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:30,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Waiting until timeout for monitored process [2022-03-01 17:32:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:30,712 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:30,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:31,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:31,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:31,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:31,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:31,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:31,264 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:31,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:31,306 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:31,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:32,295 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:32,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-03-01 17:32:32,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:32,299 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:32,301 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:32,331 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:32,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-03-01 17:32:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:32,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825529323] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:32,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:32,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:32:32,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891013355] [2022-03-01 17:32:32,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:32,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:32,751 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:32,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:32,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:32,751 INFO L87 Difference]: Start difference. First operand 542 states and 1606 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:33,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:33,512 INFO L93 Difference]: Finished difference Result 612 states and 1754 transitions. [2022-03-01 17:32:33,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:32:33,512 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:33,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:33,513 INFO L225 Difference]: With dead ends: 612 [2022-03-01 17:32:33,513 INFO L226 Difference]: Without dead ends: 603 [2022-03-01 17:32:33,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:32:33,513 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 55 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:33,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 13 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 335 Invalid, 0 Unknown, 55 Unchecked, 0.2s Time] [2022-03-01 17:32:33,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-03-01 17:32:33,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 544. [2022-03-01 17:32:33,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 2.9668508287292816) internal successors, (1611), 543 states have internal predecessors, (1611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:33,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1611 transitions. [2022-03-01 17:32:33,519 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1611 transitions. Word has length 16 [2022-03-01 17:32:33,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:33,520 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 1611 transitions. [2022-03-01 17:32:33,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:33,520 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1611 transitions. [2022-03-01 17:32:33,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:33,520 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:33,520 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:33,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (216)] Ended with exit code 0 [2022-03-01 17:32:33,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,216 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:33,721 INFO L402 AbstractCegarLoop]: === Iteration 226 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:33,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:33,721 INFO L85 PathProgramCache]: Analyzing trace with hash -2135323555, now seen corresponding path program 212 times [2022-03-01 17:32:33,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:33,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065938793] [2022-03-01 17:32:33,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:33,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:33,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:33,922 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:33,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065938793] [2022-03-01 17:32:33,922 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065938793] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:33,922 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413396005] [2022-03-01 17:32:33,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:32:33,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:33,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:33,923 INFO L229 MonitoredProcess]: Starting monitored process 217 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:33,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Waiting until timeout for monitored process [2022-03-01 17:32:33,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:32:33,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:33,948 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:33,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:34,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:34,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:34,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:34,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:34,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:34,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:34,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:34,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:34,516 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:34,563 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:34,563 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:35,607 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:35,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-03-01 17:32:35,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:35,611 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:35,613 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:35,642 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:35,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-03-01 17:32:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:36,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413396005] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:36,120 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:36,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:32:36,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115606564] [2022-03-01 17:32:36,121 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:36,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:36,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:36,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:36,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:36,121 INFO L87 Difference]: Start difference. First operand 544 states and 1611 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:37,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:37,123 INFO L93 Difference]: Finished difference Result 623 states and 1771 transitions. [2022-03-01 17:32:37,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:32:37,123 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:37,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:37,124 INFO L225 Difference]: With dead ends: 623 [2022-03-01 17:32:37,124 INFO L226 Difference]: Without dead ends: 616 [2022-03-01 17:32:37,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=193, Invalid=1139, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:32:37,124 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 47 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:37,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 26 Invalid, 604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 565 Invalid, 0 Unknown, 14 Unchecked, 0.3s Time] [2022-03-01 17:32:37,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-03-01 17:32:37,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 549. [2022-03-01 17:32:37,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 548 states have (on average 2.968978102189781) internal successors, (1627), 548 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:37,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 1627 transitions. [2022-03-01 17:32:37,130 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 1627 transitions. Word has length 16 [2022-03-01 17:32:37,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:37,131 INFO L470 AbstractCegarLoop]: Abstraction has 549 states and 1627 transitions. [2022-03-01 17:32:37,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:37,131 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 1627 transitions. [2022-03-01 17:32:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:37,131 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:37,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:37,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (217)] Ended with exit code 0 [2022-03-01 17:32:37,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2022-03-01 17:32:37,332 INFO L402 AbstractCegarLoop]: === Iteration 227 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:37,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:37,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2127593157, now seen corresponding path program 213 times [2022-03-01 17:32:37,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:37,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094339943] [2022-03-01 17:32:37,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:37,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:37,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:37,509 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:37,509 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:37,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094339943] [2022-03-01 17:32:37,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094339943] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:37,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962054] [2022-03-01 17:32:37,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:32:37,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:37,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:37,511 INFO L229 MonitoredProcess]: Starting monitored process 218 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:37,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Waiting until timeout for monitored process [2022-03-01 17:32:37,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:32:37,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:37,536 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:37,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:38,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:38,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:38,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:38,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:38,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-03-01 17:32:38,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:38,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:32:38,084 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:38,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:39,101 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:39,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 236 treesize of output 224 [2022-03-01 17:32:39,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:39,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:39,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:39,136 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:39,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 234 [2022-03-01 17:32:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:39,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962054] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:39,513 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:39,513 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:32:39,513 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409237575] [2022-03-01 17:32:39,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:39,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:32:39,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:39,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:32:39,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:39,514 INFO L87 Difference]: Start difference. First operand 549 states and 1627 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:40,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:40,920 INFO L93 Difference]: Finished difference Result 662 states and 1853 transitions. [2022-03-01 17:32:40,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:32:40,920 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:40,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:40,921 INFO L225 Difference]: With dead ends: 662 [2022-03-01 17:32:40,921 INFO L226 Difference]: Without dead ends: 658 [2022-03-01 17:32:40,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:32:40,922 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 68 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:40,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 59 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:32:40,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2022-03-01 17:32:40,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 545. [2022-03-01 17:32:40,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545 states, 544 states have (on average 2.963235294117647) internal successors, (1612), 544 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:40,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545 states to 545 states and 1612 transitions. [2022-03-01 17:32:40,928 INFO L78 Accepts]: Start accepts. Automaton has 545 states and 1612 transitions. Word has length 16 [2022-03-01 17:32:40,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:40,928 INFO L470 AbstractCegarLoop]: Abstraction has 545 states and 1612 transitions. [2022-03-01 17:32:40,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:40,929 INFO L276 IsEmpty]: Start isEmpty. Operand 545 states and 1612 transitions. [2022-03-01 17:32:40,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:40,929 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:40,929 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:40,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (218)] Ended with exit code 0 [2022-03-01 17:32:41,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2022-03-01 17:32:41,130 INFO L402 AbstractCegarLoop]: === Iteration 228 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:41,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:41,130 INFO L85 PathProgramCache]: Analyzing trace with hash -328145499, now seen corresponding path program 214 times [2022-03-01 17:32:41,130 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:41,130 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936615565] [2022-03-01 17:32:41,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:41,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:41,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:41,437 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:41,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936615565] [2022-03-01 17:32:41,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936615565] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:41,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982056980] [2022-03-01 17:32:41,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:32:41,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:41,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:41,438 INFO L229 MonitoredProcess]: Starting monitored process 219 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:41,439 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Waiting until timeout for monitored process [2022-03-01 17:32:41,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:32:41,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:41,463 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:41,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:42,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:42,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:42,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:42,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:42,024 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:42,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:42,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:42,026 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:42,026 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:42,069 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:43,002 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:43,002 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-03-01 17:32:43,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:43,006 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:43,008 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:43,038 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:43,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-03-01 17:32:43,409 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:43,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982056980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:43,409 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:43,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:32:43,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634200677] [2022-03-01 17:32:43,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:43,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:43,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:43,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:43,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=573, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:43,410 INFO L87 Difference]: Start difference. First operand 545 states and 1612 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:43,841 INFO L93 Difference]: Finished difference Result 588 states and 1698 transitions. [2022-03-01 17:32:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:32:43,841 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:43,842 INFO L225 Difference]: With dead ends: 588 [2022-03-01 17:32:43,842 INFO L226 Difference]: Without dead ends: 582 [2022-03-01 17:32:43,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:32:43,842 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 21 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 80 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:43,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 14 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 375 Invalid, 0 Unknown, 80 Unchecked, 0.2s Time] [2022-03-01 17:32:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2022-03-01 17:32:43,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 550. [2022-03-01 17:32:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 2.963570127504554) internal successors, (1627), 549 states have internal predecessors, (1627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:43,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 1627 transitions. [2022-03-01 17:32:43,849 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 1627 transitions. Word has length 16 [2022-03-01 17:32:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:43,849 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 1627 transitions. [2022-03-01 17:32:43,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:43,849 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 1627 transitions. [2022-03-01 17:32:43,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:43,849 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:43,849 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:43,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (219)] Ended with exit code 0 [2022-03-01 17:32:44,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2022-03-01 17:32:44,050 INFO L402 AbstractCegarLoop]: === Iteration 229 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:44,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:44,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1732714303, now seen corresponding path program 215 times [2022-03-01 17:32:44,050 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:44,050 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478668130] [2022-03-01 17:32:44,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:44,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:44,269 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:44,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478668130] [2022-03-01 17:32:44,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478668130] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:44,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000213193] [2022-03-01 17:32:44,270 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:32:44,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:44,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:44,271 INFO L229 MonitoredProcess]: Starting monitored process 220 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:44,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Waiting until timeout for monitored process [2022-03-01 17:32:44,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:32:44,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:44,296 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:44,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:44,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:44,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:44,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:44,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:44,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:44,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:44,855 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:44,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:44,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:44,896 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:45,829 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:45,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-03-01 17:32:45,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:45,833 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:45,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:45,864 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:45,864 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-03-01 17:32:46,304 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:46,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000213193] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:46,304 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:46,305 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:32:46,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180999029] [2022-03-01 17:32:46,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:46,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:32:46,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:46,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:32:46,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:46,305 INFO L87 Difference]: Start difference. First operand 550 states and 1627 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:46,917 INFO L93 Difference]: Finished difference Result 597 states and 1714 transitions. [2022-03-01 17:32:46,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:32:46,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:46,920 INFO L225 Difference]: With dead ends: 597 [2022-03-01 17:32:46,920 INFO L226 Difference]: Without dead ends: 591 [2022-03-01 17:32:46,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:32:46,921 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 23 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:46,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 30 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 400 Invalid, 0 Unknown, 89 Unchecked, 0.2s Time] [2022-03-01 17:32:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-03-01 17:32:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 553. [2022-03-01 17:32:46,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 552 states have (on average 2.9655797101449277) internal successors, (1637), 552 states have internal predecessors, (1637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1637 transitions. [2022-03-01 17:32:46,927 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1637 transitions. Word has length 16 [2022-03-01 17:32:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:46,927 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 1637 transitions. [2022-03-01 17:32:46,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:46,927 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1637 transitions. [2022-03-01 17:32:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:46,928 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:46,928 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:46,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (220)] Ended with exit code 0 [2022-03-01 17:32:47,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2022-03-01 17:32:47,129 INFO L402 AbstractCegarLoop]: === Iteration 230 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:47,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:47,129 INFO L85 PathProgramCache]: Analyzing trace with hash -1249525275, now seen corresponding path program 216 times [2022-03-01 17:32:47,129 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:47,129 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222070754] [2022-03-01 17:32:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:47,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:47,370 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:47,371 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:47,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222070754] [2022-03-01 17:32:47,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222070754] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:47,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422322293] [2022-03-01 17:32:47,371 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:32:47,371 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:47,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:47,372 INFO L229 MonitoredProcess]: Starting monitored process 221 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:47,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Waiting until timeout for monitored process [2022-03-01 17:32:47,399 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:32:47,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:47,400 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:47,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:47,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:47,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:47,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:47,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:47,974 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:47,974 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:32:47,976 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:47,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:32:48,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:48,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:49,069 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:49,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-03-01 17:32:49,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:49,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:49,075 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:49,105 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:49,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-03-01 17:32:49,618 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:49,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422322293] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:49,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:49,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:32:49,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874042215] [2022-03-01 17:32:49,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:49,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:49,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:49,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:49,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=561, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:49,619 INFO L87 Difference]: Start difference. First operand 553 states and 1637 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:50,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:50,907 INFO L93 Difference]: Finished difference Result 650 states and 1817 transitions. [2022-03-01 17:32:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:32:50,907 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:50,908 INFO L225 Difference]: With dead ends: 650 [2022-03-01 17:32:50,908 INFO L226 Difference]: Without dead ends: 640 [2022-03-01 17:32:50,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=196, Invalid=1136, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:32:50,908 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 80 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 93 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:50,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 66 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 624 Invalid, 0 Unknown, 93 Unchecked, 0.4s Time] [2022-03-01 17:32:50,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-03-01 17:32:50,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 570. [2022-03-01 17:32:50,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.977152899824253) internal successors, (1694), 569 states have internal predecessors, (1694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:50,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1694 transitions. [2022-03-01 17:32:50,915 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1694 transitions. Word has length 16 [2022-03-01 17:32:50,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:50,915 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 1694 transitions. [2022-03-01 17:32:50,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:50,915 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1694 transitions. [2022-03-01 17:32:50,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:50,916 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:50,916 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:50,931 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (221)] Ended with exit code 0 [2022-03-01 17:32:51,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 221 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2022-03-01 17:32:51,116 INFO L402 AbstractCegarLoop]: === Iteration 231 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:51,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:51,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1241794877, now seen corresponding path program 217 times [2022-03-01 17:32:51,117 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:51,117 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153249585] [2022-03-01 17:32:51,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:51,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:51,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:51,351 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:51,351 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:51,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153249585] [2022-03-01 17:32:51,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153249585] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:51,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41407458] [2022-03-01 17:32:51,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:32:51,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:51,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:51,352 INFO L229 MonitoredProcess]: Starting monitored process 222 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:51,353 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Waiting until timeout for monitored process [2022-03-01 17:32:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:51,378 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:51,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:51,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:51,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:51,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:51,876 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:51,876 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 72 [2022-03-01 17:32:51,878 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:51,878 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:32:51,923 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:51,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:52,948 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:52,948 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 236 treesize of output 224 [2022-03-01 17:32:52,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:52,958 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:52,960 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:52,990 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:52,990 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 234 [2022-03-01 17:32:53,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:53,398 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41407458] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:53,398 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:53,398 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:32:53,398 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534279916] [2022-03-01 17:32:53,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:53,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:32:53,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:53,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:32:53,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:32:53,399 INFO L87 Difference]: Start difference. First operand 570 states and 1694 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:55,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:32:55,426 INFO L93 Difference]: Finished difference Result 694 states and 1947 transitions. [2022-03-01 17:32:55,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:32:55,427 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:32:55,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:32:55,432 INFO L225 Difference]: With dead ends: 694 [2022-03-01 17:32:55,432 INFO L226 Difference]: Without dead ends: 691 [2022-03-01 17:32:55,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=170, Invalid=1162, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:32:55,432 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 79 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 939 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:32:55,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 67 Invalid, 939 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:32:55,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2022-03-01 17:32:55,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 595. [2022-03-01 17:32:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.9983164983164983) internal successors, (1781), 594 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:55,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1781 transitions. [2022-03-01 17:32:55,439 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1781 transitions. Word has length 16 [2022-03-01 17:32:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:32:55,439 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1781 transitions. [2022-03-01 17:32:55,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:32:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1781 transitions. [2022-03-01 17:32:55,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:32:55,440 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:32:55,440 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:32:55,456 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (222)] Ended with exit code 0 [2022-03-01 17:32:55,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,222 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:55,641 INFO L402 AbstractCegarLoop]: === Iteration 232 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:32:55,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:32:55,641 INFO L85 PathProgramCache]: Analyzing trace with hash 1711708095, now seen corresponding path program 218 times [2022-03-01 17:32:55,641 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:32:55,641 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089590654] [2022-03-01 17:32:55,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:32:55,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:32:55,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:32:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:56,067 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:32:56,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089590654] [2022-03-01 17:32:56,067 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089590654] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:32:56,067 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781023675] [2022-03-01 17:32:56,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:32:56,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:32:56,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:32:56,068 INFO L229 MonitoredProcess]: Starting monitored process 223 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:32:56,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Waiting until timeout for monitored process [2022-03-01 17:32:56,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:32:56,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:32:56,093 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:32:56,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:32:56,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:56,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:56,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:32:56,740 INFO L353 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-03-01 17:32:56,740 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 79 [2022-03-01 17:32:56,746 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:32:56,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-01 17:32:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:56,806 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:32:57,924 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:32:57,924 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 253 treesize of output 245 [2022-03-01 17:32:57,928 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:57,929 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:57,930 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:32:57,960 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:32:57,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 221 treesize of output 259 [2022-03-01 17:32:58,481 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:32:58,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781023675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:32:58,481 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:32:58,481 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-01 17:32:58,481 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541593360] [2022-03-01 17:32:58,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:32:58,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:32:58,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:32:58,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:32:58,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:32:58,482 INFO L87 Difference]: Start difference. First operand 595 states and 1781 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:00,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:00,451 INFO L93 Difference]: Finished difference Result 674 states and 1917 transitions. [2022-03-01 17:33:00,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:33:00,451 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:00,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:00,452 INFO L225 Difference]: With dead ends: 674 [2022-03-01 17:33:00,452 INFO L226 Difference]: Without dead ends: 659 [2022-03-01 17:33:00,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=186, Invalid=1454, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:33:00,453 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 118 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:00,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 56 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 742 Invalid, 0 Unknown, 118 Unchecked, 0.5s Time] [2022-03-01 17:33:00,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2022-03-01 17:33:00,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 595. [2022-03-01 17:33:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 3.0) internal successors, (1782), 594 states have internal predecessors, (1782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1782 transitions. [2022-03-01 17:33:00,460 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1782 transitions. Word has length 16 [2022-03-01 17:33:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:00,460 INFO L470 AbstractCegarLoop]: Abstraction has 595 states and 1782 transitions. [2022-03-01 17:33:00,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:00,460 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1782 transitions. [2022-03-01 17:33:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:33:00,461 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:00,461 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:00,476 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (223)] Ended with exit code 0 [2022-03-01 17:33:00,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,223 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:00,661 INFO L402 AbstractCegarLoop]: === Iteration 233 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:00,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1270531483, now seen corresponding path program 219 times [2022-03-01 17:33:00,662 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:00,662 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850369239] [2022-03-01 17:33:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:00,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:00,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:00,862 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:00,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850369239] [2022-03-01 17:33:00,862 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850369239] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:00,862 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1179740457] [2022-03-01 17:33:00,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:33:00,863 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:00,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:00,863 INFO L229 MonitoredProcess]: Starting monitored process 224 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:00,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Waiting until timeout for monitored process [2022-03-01 17:33:00,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:33:00,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:00,889 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:33:00,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:01,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:01,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:01,507 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:01,507 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2022-03-01 17:33:01,509 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:01,509 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:33:01,550 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:01,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:02,606 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:33:02,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 227 treesize of output 219 [2022-03-01 17:33:02,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:02,610 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:02,612 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:02,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:02,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 195 treesize of output 233 [2022-03-01 17:33:03,252 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:03,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1179740457] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:03,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:03,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:33:03,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852550811] [2022-03-01 17:33:03,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:03,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:33:03,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:03,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:33:03,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:03,253 INFO L87 Difference]: Start difference. First operand 595 states and 1782 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:04,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:04,311 INFO L93 Difference]: Finished difference Result 664 states and 1903 transitions. [2022-03-01 17:33:04,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:33:04,312 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:04,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:04,313 INFO L225 Difference]: With dead ends: 664 [2022-03-01 17:33:04,313 INFO L226 Difference]: Without dead ends: 655 [2022-03-01 17:33:04,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:33:04,313 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 60 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 48 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:04,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 40 Invalid, 636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 559 Invalid, 0 Unknown, 48 Unchecked, 0.4s Time] [2022-03-01 17:33:04,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2022-03-01 17:33:04,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 586. [2022-03-01 17:33:04,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 586 states, 585 states have (on average 3.0034188034188034) internal successors, (1757), 585 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:04,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 586 states to 586 states and 1757 transitions. [2022-03-01 17:33:04,323 INFO L78 Accepts]: Start accepts. Automaton has 586 states and 1757 transitions. Word has length 16 [2022-03-01 17:33:04,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:04,323 INFO L470 AbstractCegarLoop]: Abstraction has 586 states and 1757 transitions. [2022-03-01 17:33:04,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:04,323 INFO L276 IsEmpty]: Start isEmpty. Operand 586 states and 1757 transitions. [2022-03-01 17:33:04,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:33:04,324 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:04,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:04,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (224)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:04,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2022-03-01 17:33:04,546 INFO L402 AbstractCegarLoop]: === Iteration 234 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:04,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:04,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1542761215, now seen corresponding path program 220 times [2022-03-01 17:33:04,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:04,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619771690] [2022-03-01 17:33:04,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:04,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:04,729 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:04,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619771690] [2022-03-01 17:33:04,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619771690] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:04,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814299800] [2022-03-01 17:33:04,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:33:04,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:04,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:04,731 INFO L229 MonitoredProcess]: Starting monitored process 225 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:04,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Waiting until timeout for monitored process [2022-03-01 17:33:04,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:33:04,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:04,755 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:33:04,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:05,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:05,222 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-03-01 17:33:05,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:05,224 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:33:05,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:05,265 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:06,254 INFO L353 Elim1Store]: treesize reduction 82, result has 35.4 percent of original size [2022-03-01 17:33:06,254 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 236 treesize of output 224 [2022-03-01 17:33:06,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:06,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:06,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:06,290 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:06,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 200 treesize of output 234 [2022-03-01 17:33:06,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:06,725 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814299800] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:06,725 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:06,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-03-01 17:33:06,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684617406] [2022-03-01 17:33:06,726 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:06,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-03-01 17:33:06,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:06,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-03-01 17:33:06,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:33:06,726 INFO L87 Difference]: Start difference. First operand 586 states and 1757 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:09,184 INFO L93 Difference]: Finished difference Result 720 states and 2015 transitions. [2022-03-01 17:33:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:33:09,184 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:09,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:09,185 INFO L225 Difference]: With dead ends: 720 [2022-03-01 17:33:09,185 INFO L226 Difference]: Without dead ends: 712 [2022-03-01 17:33:09,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2022-03-01 17:33:09,186 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 101 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:09,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 48 Invalid, 768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 734 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:33:09,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-03-01 17:33:09,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 592. [2022-03-01 17:33:09,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 591 states have (on average 3.003384094754653) internal successors, (1775), 591 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:09,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 1775 transitions. [2022-03-01 17:33:09,193 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 1775 transitions. Word has length 16 [2022-03-01 17:33:09,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:09,193 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 1775 transitions. [2022-03-01 17:33:09,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:09,193 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 1775 transitions. [2022-03-01 17:33:09,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:33:09,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:09,194 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:09,209 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (225)] Ended with exit code 0 [2022-03-01 17:33:09,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable233,225 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:09,394 INFO L402 AbstractCegarLoop]: === Iteration 235 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:09,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:09,394 INFO L85 PathProgramCache]: Analyzing trace with hash 1361797405, now seen corresponding path program 221 times [2022-03-01 17:33:09,394 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:09,394 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191317575] [2022-03-01 17:33:09,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:09,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:09,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:09,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:09,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:09,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191317575] [2022-03-01 17:33:09,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191317575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:09,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314860359] [2022-03-01 17:33:09,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:33:09,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:09,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:09,996 INFO L229 MonitoredProcess]: Starting monitored process 226 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:09,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Waiting until timeout for monitored process [2022-03-01 17:33:10,022 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:33:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:10,022 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:33:10,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:10,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:10,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:10,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:10,614 INFO L353 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2022-03-01 17:33:10,614 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 79 [2022-03-01 17:33:10,620 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:33:10,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 53 [2022-03-01 17:33:10,673 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:10,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:11,456 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:33:11,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 283 treesize of output 259 [2022-03-01 17:33:11,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:11,462 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:11,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:11,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:11,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:11,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:11,495 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:11,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 235 treesize of output 271 [2022-03-01 17:33:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:12,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314860359] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:12,059 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:12,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10, 10] total 26 [2022-03-01 17:33:12,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510089010] [2022-03-01 17:33:12,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:12,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:12,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:12,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:12,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:12,060 INFO L87 Difference]: Start difference. First operand 592 states and 1775 transitions. Second operand has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:13,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:13,239 INFO L93 Difference]: Finished difference Result 641 states and 1860 transitions. [2022-03-01 17:33:13,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:33:13,240 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:13,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:13,240 INFO L225 Difference]: With dead ends: 641 [2022-03-01 17:33:13,240 INFO L226 Difference]: Without dead ends: 629 [2022-03-01 17:33:13,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=149, Invalid=1333, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:33:13,241 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 14 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:13,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 16 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 409 Invalid, 0 Unknown, 79 Unchecked, 0.3s Time] [2022-03-01 17:33:13,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-03-01 17:33:13,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 594. [2022-03-01 17:33:13,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 3.003372681281619) internal successors, (1781), 593 states have internal predecessors, (1781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:13,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1781 transitions. [2022-03-01 17:33:13,248 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1781 transitions. Word has length 16 [2022-03-01 17:33:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:13,248 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 1781 transitions. [2022-03-01 17:33:13,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1781 transitions. [2022-03-01 17:33:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:33:13,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:13,249 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:13,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (226)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:13,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2022-03-01 17:33:13,449 INFO L402 AbstractCegarLoop]: === Iteration 236 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:13,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:13,449 INFO L85 PathProgramCache]: Analyzing trace with hash -872310089, now seen corresponding path program 222 times [2022-03-01 17:33:13,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:13,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261872059] [2022-03-01 17:33:13,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:13,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:13,727 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:13,727 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:13,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261872059] [2022-03-01 17:33:13,727 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261872059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:13,727 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035340254] [2022-03-01 17:33:13,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:33:13,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:13,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:13,728 INFO L229 MonitoredProcess]: Starting monitored process 227 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:13,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Waiting until timeout for monitored process [2022-03-01 17:33:13,752 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:33:13,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:13,753 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:33:13,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:14,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:14,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:14,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:14,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:14,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:14,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:14,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:33:14,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:14,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:33:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:14,341 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:15,113 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:33:15,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 267 treesize of output 243 [2022-03-01 17:33:15,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:15,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:15,119 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:15,120 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:15,121 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:15,124 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:15,157 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:15,158 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 219 treesize of output 255 [2022-03-01 17:33:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:15,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035340254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:15,995 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:15,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-03-01 17:33:15,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496565059] [2022-03-01 17:33:15,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:15,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-03-01 17:33:15,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-03-01 17:33:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:33:15,996 INFO L87 Difference]: Start difference. First operand 594 states and 1781 transitions. Second operand has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:16,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:16,607 INFO L93 Difference]: Finished difference Result 671 states and 1918 transitions. [2022-03-01 17:33:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:33:16,608 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:16,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:16,609 INFO L225 Difference]: With dead ends: 671 [2022-03-01 17:33:16,609 INFO L226 Difference]: Without dead ends: 662 [2022-03-01 17:33:16,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:33:16,609 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 20 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:16,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 25 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 339 Invalid, 0 Unknown, 83 Unchecked, 0.2s Time] [2022-03-01 17:33:16,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2022-03-01 17:33:16,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 598. [2022-03-01 17:33:16,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 2.9983249581239533) internal successors, (1790), 597 states have internal predecessors, (1790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1790 transitions. [2022-03-01 17:33:16,616 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1790 transitions. Word has length 16 [2022-03-01 17:33:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:16,616 INFO L470 AbstractCegarLoop]: Abstraction has 598 states and 1790 transitions. [2022-03-01 17:33:16,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.5769230769230769) internal successors, (41), 26 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1790 transitions. [2022-03-01 17:33:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:33:16,617 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:16,617 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:16,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (227)] Ended with exit code 0 [2022-03-01 17:33:16,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2022-03-01 17:33:16,818 INFO L402 AbstractCegarLoop]: === Iteration 237 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:16,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:16,818 INFO L85 PathProgramCache]: Analyzing trace with hash 856737245, now seen corresponding path program 223 times [2022-03-01 17:33:16,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:16,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669453825] [2022-03-01 17:33:16,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:16,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:17,051 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:17,051 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:17,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669453825] [2022-03-01 17:33:17,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669453825] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:17,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186205732] [2022-03-01 17:33:17,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:33:17,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:17,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:17,052 INFO L229 MonitoredProcess]: Starting monitored process 228 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:17,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Waiting until timeout for monitored process [2022-03-01 17:33:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:17,077 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:33:17,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:17,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:17,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:17,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:17,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:17,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:17,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:17,600 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:33:17,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:17,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:33:17,641 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:17,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:18,422 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:33:18,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 267 treesize of output 243 [2022-03-01 17:33:18,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:18,428 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:18,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:18,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:18,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:18,433 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:18,461 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:18,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 219 treesize of output 255 [2022-03-01 17:33:19,099 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:19,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186205732] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:19,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:19,099 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:33:19,099 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366254832] [2022-03-01 17:33:19,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:19,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:33:19,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:19,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:33:19,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:19,100 INFO L87 Difference]: Start difference. First operand 598 states and 1790 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:19,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:19,727 INFO L93 Difference]: Finished difference Result 705 states and 2042 transitions. [2022-03-01 17:33:19,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:33:19,728 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:19,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:19,729 INFO L225 Difference]: With dead ends: 705 [2022-03-01 17:33:19,729 INFO L226 Difference]: Without dead ends: 693 [2022-03-01 17:33:19,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:33:19,729 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 46 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:19,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 34 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 432 Invalid, 0 Unknown, 39 Unchecked, 0.3s Time] [2022-03-01 17:33:19,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-03-01 17:33:19,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 618. [2022-03-01 17:33:19,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 3.0081037277147487) internal successors, (1856), 617 states have internal predecessors, (1856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:19,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 1856 transitions. [2022-03-01 17:33:19,736 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 1856 transitions. Word has length 16 [2022-03-01 17:33:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:19,737 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 1856 transitions. [2022-03-01 17:33:19,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:19,737 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 1856 transitions. [2022-03-01 17:33:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:33:19,737 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:19,737 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:19,753 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (228)] Ended with exit code 0 [2022-03-01 17:33:19,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable236,228 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:19,938 INFO L402 AbstractCegarLoop]: === Iteration 238 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:19,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:19,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1062263177, now seen corresponding path program 224 times [2022-03-01 17:33:19,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:19,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701701235] [2022-03-01 17:33:19,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:19,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:20,221 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:20,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701701235] [2022-03-01 17:33:20,221 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701701235] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:20,221 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514013753] [2022-03-01 17:33:20,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:33:20,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:20,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:20,223 INFO L229 MonitoredProcess]: Starting monitored process 229 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:20,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Waiting until timeout for monitored process [2022-03-01 17:33:20,248 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:33:20,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:20,249 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:33:20,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:20,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:20,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-03-01 17:33:20,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:20,718 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:33:20,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:20,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:21,589 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:33:21,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 244 [2022-03-01 17:33:21,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:21,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:21,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:21,595 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:21,597 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:21,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:21,627 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:21,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 256 [2022-03-01 17:33:22,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:22,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514013753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:22,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:22,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:33:22,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821067836] [2022-03-01 17:33:22,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:22,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:33:22,040 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:33:22,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:22,040 INFO L87 Difference]: Start difference. First operand 618 states and 1856 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:23,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:23,545 INFO L93 Difference]: Finished difference Result 781 states and 2189 transitions. [2022-03-01 17:33:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:33:23,545 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:23,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:23,546 INFO L225 Difference]: With dead ends: 781 [2022-03-01 17:33:23,546 INFO L226 Difference]: Without dead ends: 775 [2022-03-01 17:33:23,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=176, Invalid=1084, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:33:23,547 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 127 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:23,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 45 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:33:23,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2022-03-01 17:33:23,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 641. [2022-03-01 17:33:23,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 640 states have (on average 3.028125) internal successors, (1938), 640 states have internal predecessors, (1938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:23,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1938 transitions. [2022-03-01 17:33:23,555 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1938 transitions. Word has length 16 [2022-03-01 17:33:23,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:23,555 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1938 transitions. [2022-03-01 17:33:23,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:23,556 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1938 transitions. [2022-03-01 17:33:23,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:33:23,557 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:23,557 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:23,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (229)] Ended with exit code 0 [2022-03-01 17:33:23,763 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,229 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:23,763 INFO L402 AbstractCegarLoop]: === Iteration 239 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:23,764 INFO L85 PathProgramCache]: Analyzing trace with hash -450417157, now seen corresponding path program 225 times [2022-03-01 17:33:23,764 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:23,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483073447] [2022-03-01 17:33:23,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:23,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:23,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:23,989 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:23,990 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:23,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483073447] [2022-03-01 17:33:23,990 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483073447] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:23,990 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801289151] [2022-03-01 17:33:23,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:33:23,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:23,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:23,991 INFO L229 MonitoredProcess]: Starting monitored process 230 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:23,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Waiting until timeout for monitored process [2022-03-01 17:33:24,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:33:24,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:24,019 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 17:33:24,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:24,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:24,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:24,679 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:24,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:24,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:24,681 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:24,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:33:24,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:24,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:33:24,725 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:24,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:25,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:25,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:25,756 INFO L353 Elim1Store]: treesize reduction 96, result has 33.8 percent of original size [2022-03-01 17:33:25,756 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 289 treesize of output 261 [2022-03-01 17:33:25,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:25,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:25,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:25,763 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:25,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:25,768 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:25,797 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:25,797 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 237 treesize of output 269 [2022-03-01 17:33:26,393 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:26,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801289151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:26,393 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:26,393 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-01 17:33:26,393 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758103775] [2022-03-01 17:33:26,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:26,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:33:26,393 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:26,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:33:26,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:26,394 INFO L87 Difference]: Start difference. First operand 641 states and 1938 transitions. Second operand has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:32,054 INFO L93 Difference]: Finished difference Result 832 states and 2313 transitions. [2022-03-01 17:33:32,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:33:32,054 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:32,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:32,055 INFO L225 Difference]: With dead ends: 832 [2022-03-01 17:33:32,055 INFO L226 Difference]: Without dead ends: 820 [2022-03-01 17:33:32,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 808 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=427, Invalid=2879, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 17:33:32,056 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 114 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 1519 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 1685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:32,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 98 Invalid, 1685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1519 Invalid, 0 Unknown, 124 Unchecked, 0.9s Time] [2022-03-01 17:33:32,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2022-03-01 17:33:32,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 688. [2022-03-01 17:33:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 687 states have (on average 3.059679767103348) internal successors, (2102), 687 states have internal predecessors, (2102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 2102 transitions. [2022-03-01 17:33:32,064 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 2102 transitions. Word has length 16 [2022-03-01 17:33:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:32,064 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 2102 transitions. [2022-03-01 17:33:32,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.4642857142857142) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:32,064 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 2102 transitions. [2022-03-01 17:33:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:33:32,065 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:32,065 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:32,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (230)] Ended with exit code 0 [2022-03-01 17:33:32,265 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable238,230 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:32,265 INFO L402 AbstractCegarLoop]: === Iteration 240 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:32,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:32,266 INFO L85 PathProgramCache]: Analyzing trace with hash -231781027, now seen corresponding path program 226 times [2022-03-01 17:33:32,266 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:32,266 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695962964] [2022-03-01 17:33:32,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:32,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:32,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:32,549 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:32,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695962964] [2022-03-01 17:33:32,549 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695962964] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:32,549 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613992984] [2022-03-01 17:33:32,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:33:32,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:32,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:32,550 INFO L229 MonitoredProcess]: Starting monitored process 231 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:32,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Waiting until timeout for monitored process [2022-03-01 17:33:32,629 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:33:32,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:32,630 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:33:32,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:33,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:33,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:33,199 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:33,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 70 [2022-03-01 17:33:33,201 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:33,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:33:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:33,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:34,159 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:33:34,159 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 267 treesize of output 243 [2022-03-01 17:33:34,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:34,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:34,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:34,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:34,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:34,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:34,198 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:34,198 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 219 treesize of output 255 [2022-03-01 17:33:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:34,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613992984] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:34,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:34,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 25 [2022-03-01 17:33:34,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652721834] [2022-03-01 17:33:34,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:34,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:33:34,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:34,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:33:34,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:34,848 INFO L87 Difference]: Start difference. First operand 688 states and 2102 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:36,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:36,842 INFO L93 Difference]: Finished difference Result 863 states and 2469 transitions. [2022-03-01 17:33:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:33:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:36,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:36,844 INFO L225 Difference]: With dead ends: 863 [2022-03-01 17:33:36,844 INFO L226 Difference]: Without dead ends: 857 [2022-03-01 17:33:36,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=200, Invalid=1440, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:33:36,844 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 71 mSDsluCounter, 520 mSDsCounter, 0 mSdLazyCounter, 1242 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:36,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 136 Invalid, 1406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1242 Invalid, 0 Unknown, 143 Unchecked, 0.7s Time] [2022-03-01 17:33:36,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2022-03-01 17:33:36,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 724. [2022-03-01 17:33:36,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 3.078838174273859) internal successors, (2226), 723 states have internal predecessors, (2226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:36,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 2226 transitions. [2022-03-01 17:33:36,854 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 2226 transitions. Word has length 16 [2022-03-01 17:33:36,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:36,854 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 2226 transitions. [2022-03-01 17:33:36,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:36,854 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 2226 transitions. [2022-03-01 17:33:36,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:33:36,855 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:36,855 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:36,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (231)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:37,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2022-03-01 17:33:37,078 INFO L402 AbstractCegarLoop]: === Iteration 241 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:37,078 INFO L85 PathProgramCache]: Analyzing trace with hash -640370245, now seen corresponding path program 227 times [2022-03-01 17:33:37,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:37,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507212867] [2022-03-01 17:33:37,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:37,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:37,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:37,317 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:37,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507212867] [2022-03-01 17:33:37,317 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507212867] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:37,317 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085168715] [2022-03-01 17:33:37,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:33:37,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:37,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:37,318 INFO L229 MonitoredProcess]: Starting monitored process 232 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:37,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Waiting until timeout for monitored process [2022-03-01 17:33:37,344 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:33:37,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:37,344 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2022-03-01 17:33:37,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:37,724 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:37,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 86 treesize of output 70 [2022-03-01 17:33:37,727 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:37,727 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 48 [2022-03-01 17:33:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:37,773 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:38,521 INFO L353 Elim1Store]: treesize reduction 132, result has 27.1 percent of original size [2022-03-01 17:33:38,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 268 treesize of output 244 [2022-03-01 17:33:38,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:38,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:38,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:38,528 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:38,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:38,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:38,560 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:38,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 220 treesize of output 256 [2022-03-01 17:33:39,096 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:39,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085168715] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:39,097 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:39,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2022-03-01 17:33:39,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299731196] [2022-03-01 17:33:39,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:39,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-01 17:33:39,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:39,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-01 17:33:39,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:33:39,097 INFO L87 Difference]: Start difference. First operand 724 states and 2226 transitions. Second operand has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:40,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:40,838 INFO L93 Difference]: Finished difference Result 921 states and 2595 transitions. [2022-03-01 17:33:40,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:33:40,839 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:40,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:40,840 INFO L225 Difference]: With dead ends: 921 [2022-03-01 17:33:40,840 INFO L226 Difference]: Without dead ends: 911 [2022-03-01 17:33:40,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:33:40,841 INFO L933 BasicCegarLoop]: 5 mSDtfsCounter, 124 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:40,841 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 74 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:33:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2022-03-01 17:33:40,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 747. [2022-03-01 17:33:40,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 3.0938337801608577) internal successors, (2308), 746 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:40,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 2308 transitions. [2022-03-01 17:33:40,850 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 2308 transitions. Word has length 16 [2022-03-01 17:33:40,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:40,850 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 2308 transitions. [2022-03-01 17:33:40,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.64) internal successors, (41), 25 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:40,850 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 2308 transitions. [2022-03-01 17:33:40,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-01 17:33:40,851 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:40,851 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:40,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (232)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:41,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,232 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:41,051 INFO L402 AbstractCegarLoop]: === Iteration 242 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:41,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:41,052 INFO L85 PathProgramCache]: Analyzing trace with hash 1051295679, now seen corresponding path program 228 times [2022-03-01 17:33:41,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:41,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800071214] [2022-03-01 17:33:41,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:41,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:41,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:41,321 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:41,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800071214] [2022-03-01 17:33:41,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800071214] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:41,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908670334] [2022-03-01 17:33:41,321 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:33:41,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:41,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:41,322 INFO L229 MonitoredProcess]: Starting monitored process 233 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:41,323 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Waiting until timeout for monitored process [2022-03-01 17:33:41,347 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:33:41,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:41,348 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 45 conjunts are in the unsatisfiable core [2022-03-01 17:33:41,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:42,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:42,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:42,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:42,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:42,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:33:42,141 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:42,142 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 92 treesize of output 72 [2022-03-01 17:33:42,144 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:42,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:33:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:42,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:43,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:43,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:43,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:43,270 INFO L353 Elim1Store]: treesize reduction 46, result has 49.5 percent of original size [2022-03-01 17:33:43,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 250 treesize of output 238 [2022-03-01 17:33:43,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:43,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:43,277 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:43,308 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:33:43,308 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 6 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 214 treesize of output 248 [2022-03-01 17:33:44,038 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:44,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908670334] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:44,038 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:44,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-03-01 17:33:44,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293058145] [2022-03-01 17:33:44,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:44,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-03-01 17:33:44,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:44,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-03-01 17:33:44,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:44,039 INFO L87 Difference]: Start difference. First operand 747 states and 2308 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:45,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:45,668 INFO L93 Difference]: Finished difference Result 970 states and 2918 transitions. [2022-03-01 17:33:45,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:33:45,669 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-03-01 17:33:45,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:45,670 INFO L225 Difference]: With dead ends: 970 [2022-03-01 17:33:45,670 INFO L226 Difference]: Without dead ends: 965 [2022-03-01 17:33:45,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:33:45,671 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 79 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:45,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 28 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 526 Invalid, 0 Unknown, 138 Unchecked, 0.3s Time] [2022-03-01 17:33:45,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2022-03-01 17:33:45,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 739. [2022-03-01 17:33:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.100271002710027) internal successors, (2288), 738 states have internal predecessors, (2288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:45,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2288 transitions. [2022-03-01 17:33:45,680 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2288 transitions. Word has length 16 [2022-03-01 17:33:45,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:45,680 INFO L470 AbstractCegarLoop]: Abstraction has 739 states and 2288 transitions. [2022-03-01 17:33:45,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:45,680 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2288 transitions. [2022-03-01 17:33:45,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:45,681 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:45,681 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:45,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (233)] Ended with exit code 0 [2022-03-01 17:33:45,881 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,233 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:45,881 INFO L402 AbstractCegarLoop]: === Iteration 243 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:45,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:45,882 INFO L85 PathProgramCache]: Analyzing trace with hash 2002561587, now seen corresponding path program 229 times [2022-03-01 17:33:45,882 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:45,882 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152586591] [2022-03-01 17:33:45,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:45,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:45,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:45,981 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:45,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152586591] [2022-03-01 17:33:45,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152586591] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:45,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367502271] [2022-03-01 17:33:45,981 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:33:45,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:45,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:45,983 INFO L229 MonitoredProcess]: Starting monitored process 234 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:45,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Waiting until timeout for monitored process [2022-03-01 17:33:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:46,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:33:46,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:46,161 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:33:46,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:33:46,194 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:46,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:46,287 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:33:46,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:33:46,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:33:46,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:46,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367502271] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:46,307 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:46,308 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-01 17:33:46,308 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547111725] [2022-03-01 17:33:46,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:46,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:33:46,308 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:46,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:33:46,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:33:46,308 INFO L87 Difference]: Start difference. First operand 739 states and 2288 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:46,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:46,690 INFO L93 Difference]: Finished difference Result 949 states and 2872 transitions. [2022-03-01 17:33:46,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:33:46,690 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:33:46,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:46,692 INFO L225 Difference]: With dead ends: 949 [2022-03-01 17:33:46,692 INFO L226 Difference]: Without dead ends: 938 [2022-03-01 17:33:46,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:46,692 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 66 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:46,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 44 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:33:46,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 938 states. [2022-03-01 17:33:46,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 938 to 736. [2022-03-01 17:33:46,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 3.104761904761905) internal successors, (2282), 735 states have internal predecessors, (2282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:46,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 2282 transitions. [2022-03-01 17:33:46,701 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 2282 transitions. Word has length 17 [2022-03-01 17:33:46,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:46,702 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 2282 transitions. [2022-03-01 17:33:46,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:46,702 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 2282 transitions. [2022-03-01 17:33:46,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:46,703 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:46,703 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:46,718 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (234)] Ended with exit code 0 [2022-03-01 17:33:46,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,234 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:46,903 INFO L402 AbstractCegarLoop]: === Iteration 244 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:46,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:46,903 INFO L85 PathProgramCache]: Analyzing trace with hash 464142085, now seen corresponding path program 230 times [2022-03-01 17:33:46,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:46,904 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76985261] [2022-03-01 17:33:46,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:46,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:47,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:47,007 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:47,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76985261] [2022-03-01 17:33:47,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76985261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:47,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392788536] [2022-03-01 17:33:47,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:33:47,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:47,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:47,011 INFO L229 MonitoredProcess]: Starting monitored process 235 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:47,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Waiting until timeout for monitored process [2022-03-01 17:33:47,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:33:47,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:47,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:33:47,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:47,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:33:47,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:33:47,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:33:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:47,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:47,290 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:33:47,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:33:47,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:33:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:47,306 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392788536] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:47,306 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:47,306 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-01 17:33:47,306 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403446325] [2022-03-01 17:33:47,306 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:47,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:33:47,306 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:47,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:33:47,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:33:47,306 INFO L87 Difference]: Start difference. First operand 736 states and 2282 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:47,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:47,609 INFO L93 Difference]: Finished difference Result 950 states and 2880 transitions. [2022-03-01 17:33:47,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:33:47,609 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:33:47,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:47,610 INFO L225 Difference]: With dead ends: 950 [2022-03-01 17:33:47,610 INFO L226 Difference]: Without dead ends: 950 [2022-03-01 17:33:47,610 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:33:47,611 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 53 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:47,611 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 40 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:33:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 950 states. [2022-03-01 17:33:47,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 950 to 737. [2022-03-01 17:33:47,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.104619565217391) internal successors, (2285), 736 states have internal predecessors, (2285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2285 transitions. [2022-03-01 17:33:47,620 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2285 transitions. Word has length 17 [2022-03-01 17:33:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:47,620 INFO L470 AbstractCegarLoop]: Abstraction has 737 states and 2285 transitions. [2022-03-01 17:33:47,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:47,620 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2285 transitions. [2022-03-01 17:33:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:47,621 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:47,621 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:47,637 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (235)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:47,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2022-03-01 17:33:47,821 INFO L402 AbstractCegarLoop]: === Iteration 245 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:47,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:47,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2101260275, now seen corresponding path program 231 times [2022-03-01 17:33:47,822 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:47,822 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550169332] [2022-03-01 17:33:47,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:47,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:47,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:47,936 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:47,937 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:47,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550169332] [2022-03-01 17:33:47,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550169332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:47,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494932569] [2022-03-01 17:33:47,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:33:47,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:47,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:47,938 INFO L229 MonitoredProcess]: Starting monitored process 236 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:47,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Waiting until timeout for monitored process [2022-03-01 17:33:47,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:33:47,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:47,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:33:47,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:48,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:48,108 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:33:48,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:48,110 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:33:48,185 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:48,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:48,330 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:33:48,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:33:48,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:33:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:48,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494932569] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:48,351 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:48,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:33:48,351 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799943260] [2022-03-01 17:33:48,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:48,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:33:48,351 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:48,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:33:48,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:33:48,351 INFO L87 Difference]: Start difference. First operand 737 states and 2285 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:48,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:48,765 INFO L93 Difference]: Finished difference Result 995 states and 2952 transitions. [2022-03-01 17:33:48,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:33:48,765 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:33:48,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:48,766 INFO L225 Difference]: With dead ends: 995 [2022-03-01 17:33:48,766 INFO L226 Difference]: Without dead ends: 995 [2022-03-01 17:33:48,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:48,767 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 133 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:48,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 72 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:33:48,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 995 states. [2022-03-01 17:33:48,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 995 to 744. [2022-03-01 17:33:48,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 743 states have (on average 3.1063257065948857) internal successors, (2308), 743 states have internal predecessors, (2308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 2308 transitions. [2022-03-01 17:33:48,776 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 2308 transitions. Word has length 17 [2022-03-01 17:33:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:48,776 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 2308 transitions. [2022-03-01 17:33:48,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 2308 transitions. [2022-03-01 17:33:48,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:48,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:48,777 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:48,793 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (236)] Ended with exit code 0 [2022-03-01 17:33:48,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2022-03-01 17:33:48,977 INFO L402 AbstractCegarLoop]: === Iteration 246 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:48,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:48,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1392090793, now seen corresponding path program 232 times [2022-03-01 17:33:48,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:48,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914085261] [2022-03-01 17:33:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:48,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:48,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:49,084 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:49,084 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:49,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914085261] [2022-03-01 17:33:49,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914085261] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:49,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861118566] [2022-03-01 17:33:49,084 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:33:49,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:49,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:49,085 INFO L229 MonitoredProcess]: Starting monitored process 237 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:49,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Waiting until timeout for monitored process [2022-03-01 17:33:49,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:33:49,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:49,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:33:49,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:49,253 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:49,253 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:33:49,255 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:49,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:33:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:49,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:49,460 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:33:49,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:33:49,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:33:49,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:49,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861118566] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:49,475 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:49,475 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:33:49,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759253720] [2022-03-01 17:33:49,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:49,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:33:49,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:33:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:33:49,476 INFO L87 Difference]: Start difference. First operand 744 states and 2308 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:51,397 INFO L93 Difference]: Finished difference Result 1057 states and 3063 transitions. [2022-03-01 17:33:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:33:51,397 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:33:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:51,399 INFO L225 Difference]: With dead ends: 1057 [2022-03-01 17:33:51,399 INFO L226 Difference]: Without dead ends: 1048 [2022-03-01 17:33:51,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=594, Invalid=3696, Unknown=0, NotChecked=0, Total=4290 [2022-03-01 17:33:51,399 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 152 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:51,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 94 Invalid, 1274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:33:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-03-01 17:33:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 759. [2022-03-01 17:33:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 758 states have (on average 3.108179419525066) internal successors, (2356), 758 states have internal predecessors, (2356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 2356 transitions. [2022-03-01 17:33:51,409 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 2356 transitions. Word has length 17 [2022-03-01 17:33:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:51,409 INFO L470 AbstractCegarLoop]: Abstraction has 759 states and 2356 transitions. [2022-03-01 17:33:51,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 2356 transitions. [2022-03-01 17:33:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:51,410 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:51,410 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:51,426 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (237)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:51,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2022-03-01 17:33:51,611 INFO L402 AbstractCegarLoop]: === Iteration 247 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:51,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash 326252913, now seen corresponding path program 233 times [2022-03-01 17:33:51,611 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:51,611 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103936120] [2022-03-01 17:33:51,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:51,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:51,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:51,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:51,713 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:51,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103936120] [2022-03-01 17:33:51,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103936120] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:51,713 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959066044] [2022-03-01 17:33:51,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:33:51,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:51,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:51,714 INFO L229 MonitoredProcess]: Starting monitored process 238 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:51,715 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Waiting until timeout for monitored process [2022-03-01 17:33:51,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:33:51,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:51,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:33:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:51,884 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:51,884 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:33:51,886 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:51,886 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:33:51,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:51,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:52,085 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:33:52,086 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:33:52,087 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:33:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:52,101 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959066044] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:52,101 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:52,101 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:33:52,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412440306] [2022-03-01 17:33:52,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:52,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:33:52,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:52,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:33:52,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:33:52,102 INFO L87 Difference]: Start difference. First operand 759 states and 2356 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:53,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:53,570 INFO L93 Difference]: Finished difference Result 1066 states and 3092 transitions. [2022-03-01 17:33:53,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:33:53,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:33:53,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:53,572 INFO L225 Difference]: With dead ends: 1066 [2022-03-01 17:33:53,572 INFO L226 Difference]: Without dead ends: 1066 [2022-03-01 17:33:53,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=419, Invalid=2443, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:33:53,572 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 132 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:53,572 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 78 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:33:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-03-01 17:33:53,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 754. [2022-03-01 17:33:53,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 3.102257636122178) internal successors, (2336), 753 states have internal predecessors, (2336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:53,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 2336 transitions. [2022-03-01 17:33:53,582 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 2336 transitions. Word has length 17 [2022-03-01 17:33:53,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:53,582 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 2336 transitions. [2022-03-01 17:33:53,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:53,582 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 2336 transitions. [2022-03-01 17:33:53,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:53,583 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:53,583 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:53,606 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (238)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:53,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 238 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2022-03-01 17:33:53,800 INFO L402 AbstractCegarLoop]: === Iteration 248 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:53,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:53,800 INFO L85 PathProgramCache]: Analyzing trace with hash -1384360395, now seen corresponding path program 234 times [2022-03-01 17:33:53,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:53,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447443162] [2022-03-01 17:33:53,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:53,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:53,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:53,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:53,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447443162] [2022-03-01 17:33:53,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447443162] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:53,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2062092151] [2022-03-01 17:33:53,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:33:53,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:53,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:53,914 INFO L229 MonitoredProcess]: Starting monitored process 239 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:53,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Waiting until timeout for monitored process [2022-03-01 17:33:53,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:33:53,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:53,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:33:53,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:54,111 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:54,112 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:33:54,114 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:54,114 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:33:54,139 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:54,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:54,280 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:33:54,280 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:33:54,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:33:54,295 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:54,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2062092151] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:54,295 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:54,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:33:54,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967684298] [2022-03-01 17:33:54,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:54,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:33:54,295 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:54,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:33:54,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:33:54,296 INFO L87 Difference]: Start difference. First operand 754 states and 2336 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:55,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:55,633 INFO L93 Difference]: Finished difference Result 1075 states and 3145 transitions. [2022-03-01 17:33:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:33:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:33:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:55,635 INFO L225 Difference]: With dead ends: 1075 [2022-03-01 17:33:55,635 INFO L226 Difference]: Without dead ends: 1075 [2022-03-01 17:33:55,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=416, Invalid=1936, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:33:55,635 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 89 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:55,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 54 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 890 Invalid, 0 Unknown, 81 Unchecked, 0.4s Time] [2022-03-01 17:33:55,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-03-01 17:33:55,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 769. [2022-03-01 17:33:55,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 3.1028645833333335) internal successors, (2383), 768 states have internal predecessors, (2383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2383 transitions. [2022-03-01 17:33:55,645 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2383 transitions. Word has length 17 [2022-03-01 17:33:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:55,645 INFO L470 AbstractCegarLoop]: Abstraction has 769 states and 2383 transitions. [2022-03-01 17:33:55,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2383 transitions. [2022-03-01 17:33:55,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:55,646 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:55,646 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:55,662 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (239)] Ended with exit code 0 [2022-03-01 17:33:55,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,239 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:55,847 INFO L402 AbstractCegarLoop]: === Iteration 249 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:55,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:55,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1421201905, now seen corresponding path program 235 times [2022-03-01 17:33:55,847 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:55,847 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626379567] [2022-03-01 17:33:55,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:55,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:55,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:55,954 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:55,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626379567] [2022-03-01 17:33:55,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626379567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:55,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291647379] [2022-03-01 17:33:55,954 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:33:55,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:55,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:55,955 INFO L229 MonitoredProcess]: Starting monitored process 240 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:55,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Waiting until timeout for monitored process [2022-03-01 17:33:55,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:55,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:33:55,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:56,146 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:56,147 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:33:56,149 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:56,149 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:33:56,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:56,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:56,294 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:33:56,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:33:56,296 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:33:56,310 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:56,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291647379] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:56,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:56,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:33:56,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147575009] [2022-03-01 17:33:56,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:56,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:33:56,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:56,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:33:56,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:33:56,311 INFO L87 Difference]: Start difference. First operand 769 states and 2383 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:56,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:56,823 INFO L93 Difference]: Finished difference Result 1031 states and 3079 transitions. [2022-03-01 17:33:56,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:33:56,823 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:33:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:56,824 INFO L225 Difference]: With dead ends: 1031 [2022-03-01 17:33:56,824 INFO L226 Difference]: Without dead ends: 1031 [2022-03-01 17:33:56,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:33:56,825 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 58 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 604 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 604 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 160 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:56,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 46 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 604 Invalid, 0 Unknown, 160 Unchecked, 0.2s Time] [2022-03-01 17:33:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2022-03-01 17:33:56,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 777. [2022-03-01 17:33:56,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 776 states have (on average 3.097938144329897) internal successors, (2404), 776 states have internal predecessors, (2404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:56,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 2404 transitions. [2022-03-01 17:33:56,837 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 2404 transitions. Word has length 17 [2022-03-01 17:33:56,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:56,837 INFO L470 AbstractCegarLoop]: Abstraction has 777 states and 2404 transitions. [2022-03-01 17:33:56,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:56,837 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 2404 transitions. [2022-03-01 17:33:56,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:56,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:56,838 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:56,860 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (240)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:57,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,240 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:57,051 INFO L402 AbstractCegarLoop]: === Iteration 250 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:57,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:57,052 INFO L85 PathProgramCache]: Analyzing trace with hash -1800680011, now seen corresponding path program 236 times [2022-03-01 17:33:57,052 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:57,052 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470002068] [2022-03-01 17:33:57,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:57,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:57,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:57,172 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:57,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470002068] [2022-03-01 17:33:57,172 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470002068] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:57,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963213020] [2022-03-01 17:33:57,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:33:57,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:57,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:57,176 INFO L229 MonitoredProcess]: Starting monitored process 241 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:57,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Waiting until timeout for monitored process [2022-03-01 17:33:57,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:33:57,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:57,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:33:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:57,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:57,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:33:57,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:57,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:33:57,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:57,392 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:57,495 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:33:57,496 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:33:57,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:33:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:57,511 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963213020] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:57,511 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:57,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:33:57,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154332712] [2022-03-01 17:33:57,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:57,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:33:57,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:33:57,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:33:57,512 INFO L87 Difference]: Start difference. First operand 777 states and 2404 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:57,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:57,848 INFO L93 Difference]: Finished difference Result 1017 states and 3050 transitions. [2022-03-01 17:33:57,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:33:57,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:33:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:57,849 INFO L225 Difference]: With dead ends: 1017 [2022-03-01 17:33:57,849 INFO L226 Difference]: Without dead ends: 1017 [2022-03-01 17:33:57,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:57,850 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 61 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 119 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:57,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 42 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 447 Invalid, 0 Unknown, 119 Unchecked, 0.2s Time] [2022-03-01 17:33:57,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-03-01 17:33:57,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 780. [2022-03-01 17:33:57,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.096277278562259) internal successors, (2412), 779 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2412 transitions. [2022-03-01 17:33:57,859 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2412 transitions. Word has length 17 [2022-03-01 17:33:57,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:57,860 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2412 transitions. [2022-03-01 17:33:57,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2412 transitions. [2022-03-01 17:33:57,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:57,861 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:57,861 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:57,876 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (241)] Ended with exit code 0 [2022-03-01 17:33:58,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2022-03-01 17:33:58,061 INFO L402 AbstractCegarLoop]: === Iteration 251 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:58,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:58,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1535888509, now seen corresponding path program 237 times [2022-03-01 17:33:58,061 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:58,061 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001663586] [2022-03-01 17:33:58,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:58,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:58,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:58,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:58,168 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:58,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001663586] [2022-03-01 17:33:58,168 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001663586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:58,168 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985368027] [2022-03-01 17:33:58,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:33:58,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:58,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:58,169 INFO L229 MonitoredProcess]: Starting monitored process 242 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:58,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Waiting until timeout for monitored process [2022-03-01 17:33:58,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:33:58,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:58,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:33:58,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:58,363 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:58,364 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:33:58,366 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:58,366 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:33:58,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:58,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:58,501 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:33:58,501 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:33:58,503 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:33:58,517 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:58,517 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985368027] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:58,517 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:58,517 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:33:58,517 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088582083] [2022-03-01 17:33:58,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:58,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:33:58,517 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:58,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:33:58,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:33:58,518 INFO L87 Difference]: Start difference. First operand 780 states and 2412 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:58,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:58,828 INFO L93 Difference]: Finished difference Result 1003 states and 3028 transitions. [2022-03-01 17:33:58,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:33:58,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:33:58,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:58,830 INFO L225 Difference]: With dead ends: 1003 [2022-03-01 17:33:58,830 INFO L226 Difference]: Without dead ends: 1003 [2022-03-01 17:33:58,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:58,830 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:58,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 396 Invalid, 0 Unknown, 60 Unchecked, 0.2s Time] [2022-03-01 17:33:58,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1003 states. [2022-03-01 17:33:58,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1003 to 781. [2022-03-01 17:33:58,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 3.094871794871795) internal successors, (2414), 780 states have internal predecessors, (2414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:58,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2414 transitions. [2022-03-01 17:33:58,841 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2414 transitions. Word has length 17 [2022-03-01 17:33:58,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:58,842 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 2414 transitions. [2022-03-01 17:33:58,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:58,842 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2414 transitions. [2022-03-01 17:33:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:58,843 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:58,843 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:58,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (242)] Forceful destruction successful, exit code 0 [2022-03-01 17:33:59,065 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,242 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:59,065 INFO L402 AbstractCegarLoop]: === Iteration 252 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:33:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:33:59,065 INFO L85 PathProgramCache]: Analyzing trace with hash 1706590939, now seen corresponding path program 238 times [2022-03-01 17:33:59,065 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:33:59,065 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141474288] [2022-03-01 17:33:59,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:33:59,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:33:59,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:33:59,169 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:59,169 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:33:59,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141474288] [2022-03-01 17:33:59,169 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141474288] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:33:59,169 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223807641] [2022-03-01 17:33:59,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:33:59,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:33:59,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:33:59,170 INFO L229 MonitoredProcess]: Starting monitored process 243 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:33:59,171 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Waiting until timeout for monitored process [2022-03-01 17:33:59,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:33:59,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:33:59,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:33:59,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:33:59,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:59,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:33:59,379 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:33:59,380 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:33:59,406 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:59,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:33:59,542 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:33:59,542 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:33:59,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:33:59,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:33:59,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223807641] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:33:59,557 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:33:59,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:33:59,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175807745] [2022-03-01 17:33:59,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:33:59,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:33:59,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:33:59,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:33:59,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:33:59,558 INFO L87 Difference]: Start difference. First operand 781 states and 2414 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:59,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:33:59,876 INFO L93 Difference]: Finished difference Result 1004 states and 3027 transitions. [2022-03-01 17:33:59,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:33:59,877 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:33:59,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:33:59,878 INFO L225 Difference]: With dead ends: 1004 [2022-03-01 17:33:59,878 INFO L226 Difference]: Without dead ends: 1004 [2022-03-01 17:33:59,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:33:59,878 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:33:59,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 50 Invalid, 487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 427 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-03-01 17:33:59,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-03-01 17:33:59,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 780. [2022-03-01 17:33:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 780 states, 779 states have (on average 3.096277278562259) internal successors, (2412), 779 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 2412 transitions. [2022-03-01 17:33:59,888 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 2412 transitions. Word has length 17 [2022-03-01 17:33:59,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:33:59,888 INFO L470 AbstractCegarLoop]: Abstraction has 780 states and 2412 transitions. [2022-03-01 17:33:59,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:33:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 2412 transitions. [2022-03-01 17:33:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:33:59,890 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:33:59,890 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:33:59,905 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (243)] Ended with exit code 0 [2022-03-01 17:34:00,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,243 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:00,090 INFO L402 AbstractCegarLoop]: === Iteration 253 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:00,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:00,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1730096473, now seen corresponding path program 239 times [2022-03-01 17:34:00,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:00,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073410797] [2022-03-01 17:34:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:00,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:00,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:00,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073410797] [2022-03-01 17:34:00,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073410797] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:00,192 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387435089] [2022-03-01 17:34:00,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:00,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:00,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:00,193 INFO L229 MonitoredProcess]: Starting monitored process 244 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:00,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Waiting until timeout for monitored process [2022-03-01 17:34:00,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:34:00,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:00,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:00,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:00,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:00,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:00,407 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:00,408 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:00,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:00,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:00,548 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:34:00,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:34:00,550 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:34:00,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:00,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387435089] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:00,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:00,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:00,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075614508] [2022-03-01 17:34:00,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:00,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:00,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:00,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:00,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:00,565 INFO L87 Difference]: Start difference. First operand 780 states and 2412 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:00,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:00,881 INFO L93 Difference]: Finished difference Result 1012 states and 3036 transitions. [2022-03-01 17:34:00,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:34:00,881 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:00,882 INFO L225 Difference]: With dead ends: 1012 [2022-03-01 17:34:00,882 INFO L226 Difference]: Without dead ends: 1012 [2022-03-01 17:34:00,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:34:00,883 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 42 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:00,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 26 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 417 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2022-03-01 17:34:00,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-03-01 17:34:00,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 779. [2022-03-01 17:34:00,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 779 states, 778 states have (on average 3.0976863753213366) internal successors, (2410), 778 states have internal predecessors, (2410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:00,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 779 states to 779 states and 2410 transitions. [2022-03-01 17:34:00,893 INFO L78 Accepts]: Start accepts. Automaton has 779 states and 2410 transitions. Word has length 17 [2022-03-01 17:34:00,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:00,893 INFO L470 AbstractCegarLoop]: Abstraction has 779 states and 2410 transitions. [2022-03-01 17:34:00,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:00,893 INFO L276 IsEmpty]: Start isEmpty. Operand 779 states and 2410 transitions. [2022-03-01 17:34:00,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:00,894 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:00,894 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:00,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (244)] Ended with exit code 0 [2022-03-01 17:34:01,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,244 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:01,095 INFO L402 AbstractCegarLoop]: === Iteration 254 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:01,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:01,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1235007863, now seen corresponding path program 240 times [2022-03-01 17:34:01,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:01,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627889537] [2022-03-01 17:34:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:01,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:01,191 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:01,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627889537] [2022-03-01 17:34:01,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627889537] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:01,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741899114] [2022-03-01 17:34:01,191 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:01,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:01,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:01,192 INFO L229 MonitoredProcess]: Starting monitored process 245 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:01,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Waiting until timeout for monitored process [2022-03-01 17:34:01,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:34:01,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:01,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:01,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:01,351 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:01,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:01,354 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:01,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:34:01,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:01,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:34:01,385 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:01,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:01,468 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:01,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:34:01,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:34:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:01,496 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741899114] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:01,496 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:01,496 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:01,496 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404408906] [2022-03-01 17:34:01,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:01,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:01,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:01,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:01,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:01,496 INFO L87 Difference]: Start difference. First operand 779 states and 2410 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:01,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:01,997 INFO L93 Difference]: Finished difference Result 1014 states and 2964 transitions. [2022-03-01 17:34:01,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:34:01,998 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:01,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:01,999 INFO L225 Difference]: With dead ends: 1014 [2022-03-01 17:34:01,999 INFO L226 Difference]: Without dead ends: 1014 [2022-03-01 17:34:01,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:34:01,999 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 63 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:01,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 128 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2022-03-01 17:34:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 835. [2022-03-01 17:34:02,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 835 states, 834 states have (on average 3.13189448441247) internal successors, (2612), 834 states have internal predecessors, (2612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:02,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 835 states to 835 states and 2612 transitions. [2022-03-01 17:34:02,010 INFO L78 Accepts]: Start accepts. Automaton has 835 states and 2612 transitions. Word has length 17 [2022-03-01 17:34:02,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:02,010 INFO L470 AbstractCegarLoop]: Abstraction has 835 states and 2612 transitions. [2022-03-01 17:34:02,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:02,010 INFO L276 IsEmpty]: Start isEmpty. Operand 835 states and 2612 transitions. [2022-03-01 17:34:02,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:02,011 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:02,011 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:02,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (245)] Ended with exit code 0 [2022-03-01 17:34:02,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,245 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:02,212 INFO L402 AbstractCegarLoop]: === Iteration 255 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:02,212 INFO L85 PathProgramCache]: Analyzing trace with hash 315307155, now seen corresponding path program 241 times [2022-03-01 17:34:02,212 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:02,212 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455380978] [2022-03-01 17:34:02,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:02,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:02,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:02,307 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:02,307 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:02,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455380978] [2022-03-01 17:34:02,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455380978] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:02,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954290300] [2022-03-01 17:34:02,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:02,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:02,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:02,308 INFO L229 MonitoredProcess]: Starting monitored process 246 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:02,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Waiting until timeout for monitored process [2022-03-01 17:34:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:02,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:02,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:02,467 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:02,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:34:02,469 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:02,469 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:34:02,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:02,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:02,570 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:02,571 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:34:02,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:02,607 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:02,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954290300] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:02,607 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:02,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:02,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052540763] [2022-03-01 17:34:02,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:02,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:02,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:02,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:02,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:02,608 INFO L87 Difference]: Start difference. First operand 835 states and 2612 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:03,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:03,111 INFO L93 Difference]: Finished difference Result 951 states and 2828 transitions. [2022-03-01 17:34:03,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:34:03,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:03,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:03,113 INFO L225 Difference]: With dead ends: 951 [2022-03-01 17:34:03,113 INFO L226 Difference]: Without dead ends: 947 [2022-03-01 17:34:03,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=866, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:34:03,113 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 64 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:03,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 94 Invalid, 832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:03,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-03-01 17:34:03,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 836. [2022-03-01 17:34:03,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 836 states, 835 states have (on average 3.120958083832335) internal successors, (2606), 835 states have internal predecessors, (2606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 836 states to 836 states and 2606 transitions. [2022-03-01 17:34:03,123 INFO L78 Accepts]: Start accepts. Automaton has 836 states and 2606 transitions. Word has length 17 [2022-03-01 17:34:03,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:03,123 INFO L470 AbstractCegarLoop]: Abstraction has 836 states and 2606 transitions. [2022-03-01 17:34:03,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:03,123 INFO L276 IsEmpty]: Start isEmpty. Operand 836 states and 2606 transitions. [2022-03-01 17:34:03,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:03,125 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:03,125 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:03,142 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (246)] Ended with exit code 0 [2022-03-01 17:34:03,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 246 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2022-03-01 17:34:03,330 INFO L402 AbstractCegarLoop]: === Iteration 256 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:03,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:03,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1242738261, now seen corresponding path program 242 times [2022-03-01 17:34:03,330 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:03,330 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368621656] [2022-03-01 17:34:03,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:03,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:03,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:03,424 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:03,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368621656] [2022-03-01 17:34:03,427 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368621656] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:03,427 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827098865] [2022-03-01 17:34:03,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:03,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:03,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:03,428 INFO L229 MonitoredProcess]: Starting monitored process 247 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:03,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Waiting until timeout for monitored process [2022-03-01 17:34:03,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:03,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:03,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:03,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:03,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:03,552 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:03,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:03,554 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:03,626 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:03,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:03,700 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:03,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:34:03,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:34:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:03,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827098865] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:03,726 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:03,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:03,727 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521520797] [2022-03-01 17:34:03,727 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:03,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:03,727 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:03,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:03,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:03,728 INFO L87 Difference]: Start difference. First operand 836 states and 2606 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:04,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:04,209 INFO L93 Difference]: Finished difference Result 1069 states and 3064 transitions. [2022-03-01 17:34:04,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:34:04,210 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:04,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:04,212 INFO L225 Difference]: With dead ends: 1069 [2022-03-01 17:34:04,212 INFO L226 Difference]: Without dead ends: 1068 [2022-03-01 17:34:04,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:34:04,213 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 114 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:04,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 82 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:04,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2022-03-01 17:34:04,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 845. [2022-03-01 17:34:04,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.126777251184834) internal successors, (2639), 844 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:04,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 2639 transitions. [2022-03-01 17:34:04,226 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 2639 transitions. Word has length 17 [2022-03-01 17:34:04,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:04,226 INFO L470 AbstractCegarLoop]: Abstraction has 845 states and 2639 transitions. [2022-03-01 17:34:04,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:04,226 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 2639 transitions. [2022-03-01 17:34:04,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:04,227 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:04,228 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:04,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (247)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:04,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2022-03-01 17:34:04,430 INFO L402 AbstractCegarLoop]: === Iteration 257 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:04,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:04,430 INFO L85 PathProgramCache]: Analyzing trace with hash 2044354489, now seen corresponding path program 243 times [2022-03-01 17:34:04,430 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:04,430 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926515264] [2022-03-01 17:34:04,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:04,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:04,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:04,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926515264] [2022-03-01 17:34:04,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926515264] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:04,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17644832] [2022-03-01 17:34:04,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:04,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:04,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:04,537 INFO L229 MonitoredProcess]: Starting monitored process 248 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:04,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Waiting until timeout for monitored process [2022-03-01 17:34:04,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:34:04,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:04,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:34:04,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:04,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:04,668 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:04,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:04,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:04,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:04,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:04,819 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:04,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:34:04,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:04,852 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:04,852 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17644832] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:04,852 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:04,852 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:04,852 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028371303] [2022-03-01 17:34:04,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:04,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:04,852 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:04,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:04,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:04,853 INFO L87 Difference]: Start difference. First operand 845 states and 2639 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:05,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:05,746 INFO L93 Difference]: Finished difference Result 1031 states and 3001 transitions. [2022-03-01 17:34:05,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:34:05,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:05,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:05,748 INFO L225 Difference]: With dead ends: 1031 [2022-03-01 17:34:05,748 INFO L226 Difference]: Without dead ends: 1027 [2022-03-01 17:34:05,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1583, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:34:05,749 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 100 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 972 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:05,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 88 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 972 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:34:05,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-03-01 17:34:05,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 860. [2022-03-01 17:34:05,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 860 states, 859 states have (on average 3.122235157159488) internal successors, (2682), 859 states have internal predecessors, (2682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:05,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 860 states to 860 states and 2682 transitions. [2022-03-01 17:34:05,759 INFO L78 Accepts]: Start accepts. Automaton has 860 states and 2682 transitions. Word has length 17 [2022-03-01 17:34:05,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:05,759 INFO L470 AbstractCegarLoop]: Abstraction has 860 states and 2682 transitions. [2022-03-01 17:34:05,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:05,760 INFO L276 IsEmpty]: Start isEmpty. Operand 860 states and 2682 transitions. [2022-03-01 17:34:05,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:05,761 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:05,761 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:05,776 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (248)] Ended with exit code 0 [2022-03-01 17:34:05,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable256,248 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:05,961 INFO L402 AbstractCegarLoop]: === Iteration 258 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:05,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:05,961 INFO L85 PathProgramCache]: Analyzing trace with hash -532269101, now seen corresponding path program 244 times [2022-03-01 17:34:05,961 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:05,962 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194452544] [2022-03-01 17:34:05,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:05,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:05,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:06,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:06,064 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:06,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194452544] [2022-03-01 17:34:06,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194452544] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:06,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695459495] [2022-03-01 17:34:06,065 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:06,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:06,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:06,066 INFO L229 MonitoredProcess]: Starting monitored process 249 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:06,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Waiting until timeout for monitored process [2022-03-01 17:34:06,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:06,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:06,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:06,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:06,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:06,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:06,192 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:06,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:06,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:06,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:06,332 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:06,332 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:34:06,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:06,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695459495] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:06,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:06,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:06,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255978774] [2022-03-01 17:34:06,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:06,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:06,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:06,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:06,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:06,369 INFO L87 Difference]: Start difference. First operand 860 states and 2682 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:06,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:06,910 INFO L93 Difference]: Finished difference Result 1012 states and 2953 transitions. [2022-03-01 17:34:06,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:34:06,911 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:06,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:06,912 INFO L225 Difference]: With dead ends: 1012 [2022-03-01 17:34:06,912 INFO L226 Difference]: Without dead ends: 1012 [2022-03-01 17:34:06,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=944, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:34:06,913 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:06,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 122 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:06,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-03-01 17:34:06,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 840. [2022-03-01 17:34:06,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 839 states have (on average 3.1072705601907034) internal successors, (2607), 839 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:06,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 2607 transitions. [2022-03-01 17:34:06,923 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 2607 transitions. Word has length 17 [2022-03-01 17:34:06,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:06,923 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 2607 transitions. [2022-03-01 17:34:06,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:06,923 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 2607 transitions. [2022-03-01 17:34:06,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:06,924 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:06,924 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:06,940 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (249)] Ended with exit code 0 [2022-03-01 17:34:07,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2022-03-01 17:34:07,124 INFO L402 AbstractCegarLoop]: === Iteration 259 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:07,125 INFO L85 PathProgramCache]: Analyzing trace with hash 1360854451, now seen corresponding path program 245 times [2022-03-01 17:34:07,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:07,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465688018] [2022-03-01 17:34:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:07,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:07,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:07,227 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:07,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465688018] [2022-03-01 17:34:07,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465688018] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:07,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68565618] [2022-03-01 17:34:07,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:07,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:07,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:07,228 INFO L229 MonitoredProcess]: Starting monitored process 250 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:07,228 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Waiting until timeout for monitored process [2022-03-01 17:34:07,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:34:07,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:07,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:07,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:07,355 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:07,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:07,357 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:07,357 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:07,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:07,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:07,510 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:07,510 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:34:07,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:07,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68565618] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:07,541 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:07,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:07,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038323817] [2022-03-01 17:34:07,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:07,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:07,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:07,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:07,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:07,542 INFO L87 Difference]: Start difference. First operand 840 states and 2607 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:08,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:08,410 INFO L93 Difference]: Finished difference Result 1041 states and 2996 transitions. [2022-03-01 17:34:08,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-01 17:34:08,410 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:08,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:08,412 INFO L225 Difference]: With dead ends: 1041 [2022-03-01 17:34:08,412 INFO L226 Difference]: Without dead ends: 1036 [2022-03-01 17:34:08,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=225, Invalid=1755, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:34:08,413 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 106 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:08,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 130 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:34:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-03-01 17:34:08,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 859. [2022-03-01 17:34:08,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.1083916083916083) internal successors, (2667), 858 states have internal predecessors, (2667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:08,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2667 transitions. [2022-03-01 17:34:08,423 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2667 transitions. Word has length 17 [2022-03-01 17:34:08,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:08,423 INFO L470 AbstractCegarLoop]: Abstraction has 859 states and 2667 transitions. [2022-03-01 17:34:08,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:08,423 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2667 transitions. [2022-03-01 17:34:08,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:08,424 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:08,424 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:08,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (250)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:08,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2022-03-01 17:34:08,647 INFO L402 AbstractCegarLoop]: === Iteration 260 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:08,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:08,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1205065511, now seen corresponding path program 246 times [2022-03-01 17:34:08,648 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:08,648 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170311918] [2022-03-01 17:34:08,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:08,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:08,739 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:08,740 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:08,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170311918] [2022-03-01 17:34:08,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170311918] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:08,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707055429] [2022-03-01 17:34:08,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:08,740 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:08,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:08,741 INFO L229 MonitoredProcess]: Starting monitored process 251 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:08,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Waiting until timeout for monitored process [2022-03-01 17:34:08,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:34:08,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:08,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:08,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:08,922 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:08,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:34:08,924 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:08,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:34:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:08,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:09,036 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:09,036 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:34:09,038 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:09,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707055429] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:09,073 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:09,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:09,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381616937] [2022-03-01 17:34:09,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:09,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:09,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:09,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:09,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:09,074 INFO L87 Difference]: Start difference. First operand 859 states and 2667 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:09,600 INFO L93 Difference]: Finished difference Result 981 states and 2896 transitions. [2022-03-01 17:34:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:34:09,600 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:09,601 INFO L225 Difference]: With dead ends: 981 [2022-03-01 17:34:09,601 INFO L226 Difference]: Without dead ends: 973 [2022-03-01 17:34:09,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:34:09,602 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 67 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 797 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:09,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 80 Invalid, 797 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 691 Invalid, 0 Unknown, 88 Unchecked, 0.3s Time] [2022-03-01 17:34:09,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-03-01 17:34:09,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 863. [2022-03-01 17:34:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 863 states, 862 states have (on average 3.0928074245939676) internal successors, (2666), 862 states have internal predecessors, (2666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:09,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 863 states to 863 states and 2666 transitions. [2022-03-01 17:34:09,612 INFO L78 Accepts]: Start accepts. Automaton has 863 states and 2666 transitions. Word has length 17 [2022-03-01 17:34:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:09,612 INFO L470 AbstractCegarLoop]: Abstraction has 863 states and 2666 transitions. [2022-03-01 17:34:09,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 863 states and 2666 transitions. [2022-03-01 17:34:09,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:09,614 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:09,614 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:09,634 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (251)] Ended with exit code 0 [2022-03-01 17:34:09,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable259 [2022-03-01 17:34:09,825 INFO L402 AbstractCegarLoop]: === Iteration 261 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:09,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:09,826 INFO L85 PathProgramCache]: Analyzing trace with hash 562679891, now seen corresponding path program 247 times [2022-03-01 17:34:09,826 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:09,826 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492645558] [2022-03-01 17:34:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:09,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:09,947 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:09,947 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:09,947 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492645558] [2022-03-01 17:34:09,947 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492645558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:09,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250461753] [2022-03-01 17:34:09,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:09,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:09,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:09,951 INFO L229 MonitoredProcess]: Starting monitored process 252 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:09,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Waiting until timeout for monitored process [2022-03-01 17:34:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:09,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:09,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:10,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:10,141 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:10,143 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:10,144 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:10,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:10,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:10,251 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:10,251 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:34:10,252 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:34:10,277 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:10,277 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250461753] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:10,277 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:10,277 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:10,277 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727134040] [2022-03-01 17:34:10,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:10,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:10,277 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:10,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:10,278 INFO L87 Difference]: Start difference. First operand 863 states and 2666 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:10,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:10,799 INFO L93 Difference]: Finished difference Result 1076 states and 3084 transitions. [2022-03-01 17:34:10,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:34:10,799 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:10,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:10,801 INFO L225 Difference]: With dead ends: 1076 [2022-03-01 17:34:10,801 INFO L226 Difference]: Without dead ends: 1076 [2022-03-01 17:34:10,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=923, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:34:10,801 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 76 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:10,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 96 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 832 Invalid, 0 Unknown, 15 Unchecked, 0.3s Time] [2022-03-01 17:34:10,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-03-01 17:34:10,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 866. [2022-03-01 17:34:10,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.089017341040462) internal successors, (2672), 865 states have internal predecessors, (2672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:10,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 2672 transitions. [2022-03-01 17:34:10,811 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 2672 transitions. Word has length 17 [2022-03-01 17:34:10,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:10,812 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 2672 transitions. [2022-03-01 17:34:10,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:10,812 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 2672 transitions. [2022-03-01 17:34:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:10,813 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:10,813 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:10,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (252)] Ended with exit code 0 [2022-03-01 17:34:11,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,252 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:11,013 INFO L402 AbstractCegarLoop]: === Iteration 262 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:11,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1861027465, now seen corresponding path program 248 times [2022-03-01 17:34:11,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:11,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977003255] [2022-03-01 17:34:11,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:11,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:11,116 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:11,116 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:11,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977003255] [2022-03-01 17:34:11,116 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977003255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:11,116 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090286025] [2022-03-01 17:34:11,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:11,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:11,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:11,117 INFO L229 MonitoredProcess]: Starting monitored process 253 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:11,118 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Waiting until timeout for monitored process [2022-03-01 17:34:11,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:11,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:11,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:11,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:11,258 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:11,259 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:11,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:11,261 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:11,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:11,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:11,426 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:11,426 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:34:11,428 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:11,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:11,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090286025] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:11,455 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:11,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:11,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099853070] [2022-03-01 17:34:11,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:11,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:11,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:11,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:11,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:11,456 INFO L87 Difference]: Start difference. First operand 866 states and 2672 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:12,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:12,143 INFO L93 Difference]: Finished difference Result 1016 states and 2975 transitions. [2022-03-01 17:34:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:34:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:12,145 INFO L225 Difference]: With dead ends: 1016 [2022-03-01 17:34:12,145 INFO L226 Difference]: Without dead ends: 1012 [2022-03-01 17:34:12,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=1158, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:34:12,146 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 104 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:12,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 78 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:12,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-03-01 17:34:12,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 878. [2022-03-01 17:34:12,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 3.087799315849487) internal successors, (2708), 877 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:12,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 2708 transitions. [2022-03-01 17:34:12,156 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 2708 transitions. Word has length 17 [2022-03-01 17:34:12,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:12,156 INFO L470 AbstractCegarLoop]: Abstraction has 878 states and 2708 transitions. [2022-03-01 17:34:12,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:12,157 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 2708 transitions. [2022-03-01 17:34:12,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:12,158 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:12,158 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:12,174 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (253)] Ended with exit code 0 [2022-03-01 17:34:12,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,253 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:12,358 INFO L402 AbstractCegarLoop]: === Iteration 263 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:12,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:12,359 INFO L85 PathProgramCache]: Analyzing trace with hash -131980131, now seen corresponding path program 249 times [2022-03-01 17:34:12,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:12,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320582079] [2022-03-01 17:34:12,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:12,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:12,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:12,458 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:12,458 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:12,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320582079] [2022-03-01 17:34:12,458 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320582079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:12,458 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870041137] [2022-03-01 17:34:12,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:12,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:12,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:12,460 INFO L229 MonitoredProcess]: Starting monitored process 254 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:12,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Waiting until timeout for monitored process [2022-03-01 17:34:12,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:34:12,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:12,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:12,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:12,651 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:12,651 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:34:12,653 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:12,653 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:34:12,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:12,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:12,786 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:12,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:34:12,789 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:12,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:12,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870041137] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:12,816 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:12,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:12,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123602936] [2022-03-01 17:34:12,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:12,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:12,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:12,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:12,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:12,817 INFO L87 Difference]: Start difference. First operand 878 states and 2708 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:13,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:13,185 INFO L93 Difference]: Finished difference Result 948 states and 2857 transitions. [2022-03-01 17:34:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:34:13,185 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:13,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:13,186 INFO L225 Difference]: With dead ends: 948 [2022-03-01 17:34:13,186 INFO L226 Difference]: Without dead ends: 942 [2022-03-01 17:34:13,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:34:13,186 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:13,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 24 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 508 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-03-01 17:34:13,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-03-01 17:34:13,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 880. [2022-03-01 17:34:13,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 3.0819112627986347) internal successors, (2709), 879 states have internal predecessors, (2709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:13,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 2709 transitions. [2022-03-01 17:34:13,197 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 2709 transitions. Word has length 17 [2022-03-01 17:34:13,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:13,197 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 2709 transitions. [2022-03-01 17:34:13,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:13,197 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 2709 transitions. [2022-03-01 17:34:13,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:13,199 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:13,199 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:13,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (254)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:13,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,254 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:13,411 INFO L402 AbstractCegarLoop]: === Iteration 264 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash 1928879671, now seen corresponding path program 250 times [2022-03-01 17:34:13,412 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:13,412 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020835973] [2022-03-01 17:34:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:13,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:13,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:13,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:13,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020835973] [2022-03-01 17:34:13,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020835973] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:13,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411706421] [2022-03-01 17:34:13,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:13,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:13,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:13,508 INFO L229 MonitoredProcess]: Starting monitored process 255 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:13,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Waiting until timeout for monitored process [2022-03-01 17:34:13,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:13,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:13,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:13,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:13,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:13,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:34:13,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:13,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:34:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:13,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:13,819 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:13,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:34:13,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:13,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:13,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411706421] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:13,849 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:13,849 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:13,849 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068630275] [2022-03-01 17:34:13,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:13,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:13,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:13,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:13,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:13,849 INFO L87 Difference]: Start difference. First operand 880 states and 2709 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:14,181 INFO L93 Difference]: Finished difference Result 948 states and 2853 transitions. [2022-03-01 17:34:14,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:34:14,181 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:14,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:14,182 INFO L225 Difference]: With dead ends: 948 [2022-03-01 17:34:14,182 INFO L226 Difference]: Without dead ends: 936 [2022-03-01 17:34:14,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:34:14,183 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:14,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 26 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 471 Invalid, 0 Unknown, 88 Unchecked, 0.2s Time] [2022-03-01 17:34:14,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-03-01 17:34:14,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 882. [2022-03-01 17:34:14,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.0737797956867197) internal successors, (2708), 881 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:14,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2708 transitions. [2022-03-01 17:34:14,193 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2708 transitions. Word has length 17 [2022-03-01 17:34:14,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:14,193 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2708 transitions. [2022-03-01 17:34:14,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:14,193 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2708 transitions. [2022-03-01 17:34:14,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:14,194 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:14,194 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:14,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (255)] Ended with exit code 0 [2022-03-01 17:34:14,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,255 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:14,411 INFO L402 AbstractCegarLoop]: === Iteration 265 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:14,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:14,411 INFO L85 PathProgramCache]: Analyzing trace with hash 146360275, now seen corresponding path program 251 times [2022-03-01 17:34:14,411 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:14,411 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914595566] [2022-03-01 17:34:14,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:14,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:14,507 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:14,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914595566] [2022-03-01 17:34:14,507 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914595566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:14,507 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711248016] [2022-03-01 17:34:14,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:14,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:14,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:14,508 INFO L229 MonitoredProcess]: Starting monitored process 256 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:14,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Waiting until timeout for monitored process [2022-03-01 17:34:14,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:34:14,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:14,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:14,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:14,678 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:14,678 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:14,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:14,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:14,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:14,708 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:14,793 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:14,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:14,795 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:14,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:14,817 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711248016] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:14,817 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:14,817 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:14,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055823001] [2022-03-01 17:34:14,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:14,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:14,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:14,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:14,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:14,818 INFO L87 Difference]: Start difference. First operand 882 states and 2708 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:15,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:15,084 INFO L93 Difference]: Finished difference Result 981 states and 2919 transitions. [2022-03-01 17:34:15,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:34:15,084 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:15,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:15,086 INFO L225 Difference]: With dead ends: 981 [2022-03-01 17:34:15,086 INFO L226 Difference]: Without dead ends: 981 [2022-03-01 17:34:15,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:34:15,086 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 33 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:15,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 24 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 486 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-03-01 17:34:15,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-03-01 17:34:15,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 883. [2022-03-01 17:34:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 883 states, 882 states have (on average 3.0736961451247167) internal successors, (2711), 882 states have internal predecessors, (2711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 883 states to 883 states and 2711 transitions. [2022-03-01 17:34:15,096 INFO L78 Accepts]: Start accepts. Automaton has 883 states and 2711 transitions. Word has length 17 [2022-03-01 17:34:15,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:15,097 INFO L470 AbstractCegarLoop]: Abstraction has 883 states and 2711 transitions. [2022-03-01 17:34:15,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:15,097 INFO L276 IsEmpty]: Start isEmpty. Operand 883 states and 2711 transitions. [2022-03-01 17:34:15,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:15,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:15,098 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:15,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (256)] Ended with exit code 0 [2022-03-01 17:34:15,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,256 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:15,298 INFO L402 AbstractCegarLoop]: === Iteration 266 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:15,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:15,298 INFO L85 PathProgramCache]: Analyzing trace with hash -812038501, now seen corresponding path program 252 times [2022-03-01 17:34:15,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:15,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72061352] [2022-03-01 17:34:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:15,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:15,395 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:15,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72061352] [2022-03-01 17:34:15,395 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72061352] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:15,395 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507213099] [2022-03-01 17:34:15,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:15,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:15,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:15,398 INFO L229 MonitoredProcess]: Starting monitored process 257 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:15,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Waiting until timeout for monitored process [2022-03-01 17:34:15,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:34:15,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:15,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:15,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:15,596 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:15,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:15,599 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:15,599 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:15,623 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:15,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:15,709 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:15,710 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:15,711 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:15,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507213099] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:15,734 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:15,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:15,739 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190737255] [2022-03-01 17:34:15,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:15,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:15,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:15,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:15,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:15,740 INFO L87 Difference]: Start difference. First operand 883 states and 2711 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:16,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:16,014 INFO L93 Difference]: Finished difference Result 970 states and 2900 transitions. [2022-03-01 17:34:16,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:34:16,015 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:16,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:16,016 INFO L225 Difference]: With dead ends: 970 [2022-03-01 17:34:16,016 INFO L226 Difference]: Without dead ends: 970 [2022-03-01 17:34:16,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:34:16,016 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 26 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 133 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:16,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 30 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 524 Invalid, 0 Unknown, 133 Unchecked, 0.2s Time] [2022-03-01 17:34:16,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2022-03-01 17:34:16,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 884. [2022-03-01 17:34:16,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 3.072480181200453) internal successors, (2713), 883 states have internal predecessors, (2713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:16,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2713 transitions. [2022-03-01 17:34:16,026 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2713 transitions. Word has length 17 [2022-03-01 17:34:16,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:16,026 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 2713 transitions. [2022-03-01 17:34:16,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:16,026 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2713 transitions. [2022-03-01 17:34:16,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:16,027 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:16,028 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:16,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (257)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:16,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,257 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:16,229 INFO L402 AbstractCegarLoop]: === Iteration 267 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:16,229 INFO L85 PathProgramCache]: Analyzing trace with hash -641336071, now seen corresponding path program 253 times [2022-03-01 17:34:16,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:16,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031308180] [2022-03-01 17:34:16,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:16,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:16,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:16,346 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:16,346 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:16,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031308180] [2022-03-01 17:34:16,346 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031308180] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:16,346 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948540595] [2022-03-01 17:34:16,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:16,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:16,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:16,347 INFO L229 MonitoredProcess]: Starting monitored process 258 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:16,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Waiting until timeout for monitored process [2022-03-01 17:34:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:16,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:16,530 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:16,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:16,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:16,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:16,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:16,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:16,681 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:16,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:16,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:16,706 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948540595] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:16,706 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:16,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:16,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262483984] [2022-03-01 17:34:16,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:16,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:16,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:16,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:16,707 INFO L87 Difference]: Start difference. First operand 884 states and 2713 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:16,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:16,988 INFO L93 Difference]: Finished difference Result 973 states and 2901 transitions. [2022-03-01 17:34:16,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:34:16,988 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:16,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:16,990 INFO L225 Difference]: With dead ends: 973 [2022-03-01 17:34:16,990 INFO L226 Difference]: Without dead ends: 973 [2022-03-01 17:34:16,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:34:16,990 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 29 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:16,990 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 26 Invalid, 593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 536 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-03-01 17:34:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2022-03-01 17:34:16,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 882. [2022-03-01 17:34:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 3.0737797956867197) internal successors, (2708), 881 states have internal predecessors, (2708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:17,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2708 transitions. [2022-03-01 17:34:17,000 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2708 transitions. Word has length 17 [2022-03-01 17:34:17,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:17,000 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2708 transitions. [2022-03-01 17:34:17,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:17,000 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2708 transitions. [2022-03-01 17:34:17,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:17,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:17,006 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:17,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (258)] Ended with exit code 0 [2022-03-01 17:34:17,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2022-03-01 17:34:17,207 INFO L402 AbstractCegarLoop]: === Iteration 268 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:17,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:17,207 INFO L85 PathProgramCache]: Analyzing trace with hash -267672943, now seen corresponding path program 254 times [2022-03-01 17:34:17,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:17,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352843460] [2022-03-01 17:34:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:17,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:17,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:17,316 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:17,316 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:17,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352843460] [2022-03-01 17:34:17,316 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352843460] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:17,316 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186775473] [2022-03-01 17:34:17,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:17,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:17,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:17,317 INFO L229 MonitoredProcess]: Starting monitored process 259 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:17,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Waiting until timeout for monitored process [2022-03-01 17:34:17,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:17,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:17,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:17,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:17,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:17,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:17,476 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:17,476 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:17,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:17,663 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:17,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:34:17,665 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:17,688 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186775473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:17,688 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:17,688 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:34:17,689 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810739523] [2022-03-01 17:34:17,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:17,689 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:34:17,689 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:17,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:34:17,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:17,689 INFO L87 Difference]: Start difference. First operand 882 states and 2708 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:18,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:18,020 INFO L93 Difference]: Finished difference Result 1004 states and 2956 transitions. [2022-03-01 17:34:18,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:34:18,020 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:18,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:18,022 INFO L225 Difference]: With dead ends: 1004 [2022-03-01 17:34:18,022 INFO L226 Difference]: Without dead ends: 1004 [2022-03-01 17:34:18,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:34:18,022 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 89 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:18,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 72 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:34:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1004 states. [2022-03-01 17:34:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1004 to 890. [2022-03-01 17:34:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.077615298087739) internal successors, (2736), 889 states have internal predecessors, (2736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2736 transitions. [2022-03-01 17:34:18,032 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2736 transitions. Word has length 17 [2022-03-01 17:34:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:18,033 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2736 transitions. [2022-03-01 17:34:18,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:18,033 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2736 transitions. [2022-03-01 17:34:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:18,034 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:18,034 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:18,049 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (259)] Ended with exit code 0 [2022-03-01 17:34:18,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2022-03-01 17:34:18,234 INFO L402 AbstractCegarLoop]: === Iteration 269 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:18,234 INFO L85 PathProgramCache]: Analyzing trace with hash 533943285, now seen corresponding path program 255 times [2022-03-01 17:34:18,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:18,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406836846] [2022-03-01 17:34:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:18,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:18,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:18,335 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:18,335 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:18,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406836846] [2022-03-01 17:34:18,335 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406836846] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:18,335 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447416771] [2022-03-01 17:34:18,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:18,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:18,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:18,336 INFO L229 MonitoredProcess]: Starting monitored process 260 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:18,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Waiting until timeout for monitored process [2022-03-01 17:34:18,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:34:18,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:18,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:18,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:18,497 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:18,497 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:18,499 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:18,499 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:18,572 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:18,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:18,683 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:18,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:18,685 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:18,705 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447416771] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:18,705 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:18,706 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:34:18,706 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208744605] [2022-03-01 17:34:18,706 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:18,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:34:18,706 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:18,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:34:18,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:18,706 INFO L87 Difference]: Start difference. First operand 890 states and 2736 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:20,315 INFO L93 Difference]: Finished difference Result 1058 states and 3053 transitions. [2022-03-01 17:34:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-03-01 17:34:20,315 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:20,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:20,317 INFO L225 Difference]: With dead ends: 1058 [2022-03-01 17:34:20,317 INFO L226 Difference]: Without dead ends: 1048 [2022-03-01 17:34:20,317 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=459, Invalid=3323, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:34:20,317 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 133 mSDsluCounter, 332 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 1196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:20,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 78 Invalid, 1196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:34:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-03-01 17:34:20,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 906. [2022-03-01 17:34:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.079558011049724) internal successors, (2787), 905 states have internal predecessors, (2787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:20,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2787 transitions. [2022-03-01 17:34:20,328 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2787 transitions. Word has length 17 [2022-03-01 17:34:20,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:20,328 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2787 transitions. [2022-03-01 17:34:20,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:20,328 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2787 transitions. [2022-03-01 17:34:20,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:20,329 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:20,329 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:20,344 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (260)] Ended with exit code 0 [2022-03-01 17:34:20,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2022-03-01 17:34:20,529 INFO L402 AbstractCegarLoop]: === Iteration 270 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:20,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:20,530 INFO L85 PathProgramCache]: Analyzing trace with hash -2042680305, now seen corresponding path program 256 times [2022-03-01 17:34:20,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:20,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36574534] [2022-03-01 17:34:20,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:20,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:20,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:20,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36574534] [2022-03-01 17:34:20,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36574534] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:20,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951056881] [2022-03-01 17:34:20,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:20,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:20,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:20,631 INFO L229 MonitoredProcess]: Starting monitored process 261 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:20,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Waiting until timeout for monitored process [2022-03-01 17:34:20,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:20,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:20,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:20,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:20,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:20,785 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:20,786 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:20,787 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:20,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:20,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:20,980 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:20,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:20,982 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:21,005 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:21,005 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951056881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:21,005 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:21,005 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:34:21,005 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736754982] [2022-03-01 17:34:21,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:21,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:34:21,005 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:21,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:34:21,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:21,006 INFO L87 Difference]: Start difference. First operand 906 states and 2787 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:22,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:22,184 INFO L93 Difference]: Finished difference Result 1051 states and 3055 transitions. [2022-03-01 17:34:22,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:34:22,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:22,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:22,186 INFO L225 Difference]: With dead ends: 1051 [2022-03-01 17:34:22,186 INFO L226 Difference]: Without dead ends: 1051 [2022-03-01 17:34:22,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:34:22,186 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 88 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:22,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 54 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:34:22,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2022-03-01 17:34:22,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 890. [2022-03-01 17:34:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 3.073115860517435) internal successors, (2732), 889 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 2732 transitions. [2022-03-01 17:34:22,197 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 2732 transitions. Word has length 17 [2022-03-01 17:34:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:22,197 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 2732 transitions. [2022-03-01 17:34:22,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 2732 transitions. [2022-03-01 17:34:22,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:22,198 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:22,198 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:22,214 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (261)] Ended with exit code 0 [2022-03-01 17:34:22,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2022-03-01 17:34:22,399 INFO L402 AbstractCegarLoop]: === Iteration 271 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:22,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:22,399 INFO L85 PathProgramCache]: Analyzing trace with hash 541673683, now seen corresponding path program 257 times [2022-03-01 17:34:22,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:22,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909591771] [2022-03-01 17:34:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:22,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:22,495 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:22,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909591771] [2022-03-01 17:34:22,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909591771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:22,496 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586857484] [2022-03-01 17:34:22,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:22,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:22,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:22,497 INFO L229 MonitoredProcess]: Starting monitored process 262 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:22,497 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Waiting until timeout for monitored process [2022-03-01 17:34:22,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:34:22,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:22,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:22,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:22,680 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:22,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:22,683 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:22,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:22,707 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:22,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:22,827 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:22,827 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:22,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:22,847 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586857484] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:22,847 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:22,847 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:34:22,847 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170564490] [2022-03-01 17:34:22,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:22,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:34:22,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:22,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:34:22,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:22,848 INFO L87 Difference]: Start difference. First operand 890 states and 2732 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:23,691 INFO L93 Difference]: Finished difference Result 1036 states and 3045 transitions. [2022-03-01 17:34:23,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:34:23,691 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:23,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:23,693 INFO L225 Difference]: With dead ends: 1036 [2022-03-01 17:34:23,693 INFO L226 Difference]: Without dead ends: 1036 [2022-03-01 17:34:23,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=1315, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:34:23,693 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 68 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:23,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 30 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 708 Invalid, 0 Unknown, 75 Unchecked, 0.3s Time] [2022-03-01 17:34:23,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1036 states. [2022-03-01 17:34:23,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1036 to 891. [2022-03-01 17:34:23,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 3.0719101123595505) internal successors, (2734), 890 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:23,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2734 transitions. [2022-03-01 17:34:23,704 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2734 transitions. Word has length 17 [2022-03-01 17:34:23,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:23,704 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2734 transitions. [2022-03-01 17:34:23,704 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:23,704 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2734 transitions. [2022-03-01 17:34:23,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:23,705 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:23,705 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:23,720 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (262)] Ended with exit code 0 [2022-03-01 17:34:23,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,262 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:23,905 INFO L402 AbstractCegarLoop]: === Iteration 272 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:23,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:23,906 INFO L85 PathProgramCache]: Analyzing trace with hash -947731313, now seen corresponding path program 258 times [2022-03-01 17:34:23,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:23,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885074995] [2022-03-01 17:34:23,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:23,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:23,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:24,009 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:24,009 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:24,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885074995] [2022-03-01 17:34:24,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885074995] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:24,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682000299] [2022-03-01 17:34:24,009 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:24,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:24,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:24,010 INFO L229 MonitoredProcess]: Starting monitored process 263 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:24,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Waiting until timeout for monitored process [2022-03-01 17:34:24,035 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:34:24,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:24,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:24,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:24,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:24,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:24,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:24,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:24,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:24,317 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:24,317 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:24,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:24,337 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682000299] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:24,338 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:24,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:24,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471928343] [2022-03-01 17:34:24,338 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:24,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:24,338 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:24,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:24,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:24,338 INFO L87 Difference]: Start difference. First operand 891 states and 2734 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:24,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:24,647 INFO L93 Difference]: Finished difference Result 985 states and 2954 transitions. [2022-03-01 17:34:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:34:24,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:24,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:24,649 INFO L225 Difference]: With dead ends: 985 [2022-03-01 17:34:24,649 INFO L226 Difference]: Without dead ends: 985 [2022-03-01 17:34:24,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:34:24,649 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 27 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 64 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:24,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 24 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 406 Invalid, 0 Unknown, 64 Unchecked, 0.2s Time] [2022-03-01 17:34:24,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-03-01 17:34:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 899. [2022-03-01 17:34:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.0701559020044544) internal successors, (2757), 898 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:24,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2757 transitions. [2022-03-01 17:34:24,659 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2757 transitions. Word has length 17 [2022-03-01 17:34:24,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:24,659 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2757 transitions. [2022-03-01 17:34:24,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2757 transitions. [2022-03-01 17:34:24,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:24,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:24,661 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:24,683 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (263)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:24,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2022-03-01 17:34:24,883 INFO L402 AbstractCegarLoop]: === Iteration 273 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:24,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:24,883 INFO L85 PathProgramCache]: Analyzing trace with hash 659789873, now seen corresponding path program 259 times [2022-03-01 17:34:24,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:24,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377647809] [2022-03-01 17:34:24,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:24,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:24,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:24,980 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:24,980 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:24,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377647809] [2022-03-01 17:34:24,980 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377647809] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:24,980 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010576346] [2022-03-01 17:34:24,980 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:24,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:24,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:24,981 INFO L229 MonitoredProcess]: Starting monitored process 264 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:24,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Waiting until timeout for monitored process [2022-03-01 17:34:25,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:25,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:25,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:25,170 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:25,170 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:25,172 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:25,173 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:25,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:25,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:25,304 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:25,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:25,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:25,325 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2010576346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:25,325 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:25,325 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:25,325 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788506732] [2022-03-01 17:34:25,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:25,325 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:25,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:25,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:25,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:25,325 INFO L87 Difference]: Start difference. First operand 899 states and 2757 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:25,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:25,560 INFO L93 Difference]: Finished difference Result 988 states and 2955 transitions. [2022-03-01 17:34:25,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:34:25,560 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:25,561 INFO L225 Difference]: With dead ends: 988 [2022-03-01 17:34:25,561 INFO L226 Difference]: Without dead ends: 988 [2022-03-01 17:34:25,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:34:25,562 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 38 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 310 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:25,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 22 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 310 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-03-01 17:34:25,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2022-03-01 17:34:25,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 902. [2022-03-01 17:34:25,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 3.067702552719201) internal successors, (2764), 901 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:25,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 2764 transitions. [2022-03-01 17:34:25,572 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 2764 transitions. Word has length 17 [2022-03-01 17:34:25,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:25,572 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 2764 transitions. [2022-03-01 17:34:25,572 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:25,572 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 2764 transitions. [2022-03-01 17:34:25,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:25,577 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:25,577 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:25,593 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (264)] Ended with exit code 0 [2022-03-01 17:34:25,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,264 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:25,777 INFO L402 AbstractCegarLoop]: === Iteration 274 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash 830492303, now seen corresponding path program 260 times [2022-03-01 17:34:25,778 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:25,778 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223362641] [2022-03-01 17:34:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:25,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:25,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:25,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:25,879 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:25,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223362641] [2022-03-01 17:34:25,879 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223362641] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:25,879 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267529496] [2022-03-01 17:34:25,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:25,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:25,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:25,880 INFO L229 MonitoredProcess]: Starting monitored process 265 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:25,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Waiting until timeout for monitored process [2022-03-01 17:34:25,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:25,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:25,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:25,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:26,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:26,080 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:26,082 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:26,082 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:26,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:26,105 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:26,213 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:26,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:26,215 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:26,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267529496] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:26,234 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:26,234 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:26,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648827396] [2022-03-01 17:34:26,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:26,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:26,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:26,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:26,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:26,235 INFO L87 Difference]: Start difference. First operand 902 states and 2764 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:26,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:26,502 INFO L93 Difference]: Finished difference Result 990 states and 2965 transitions. [2022-03-01 17:34:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:34:26,502 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:26,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:26,503 INFO L225 Difference]: With dead ends: 990 [2022-03-01 17:34:26,503 INFO L226 Difference]: Without dead ends: 990 [2022-03-01 17:34:26,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:26,503 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:26,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 30 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 466 Invalid, 0 Unknown, 82 Unchecked, 0.2s Time] [2022-03-01 17:34:26,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-03-01 17:34:26,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 899. [2022-03-01 17:34:26,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.0679287305122496) internal successors, (2755), 898 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:26,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2755 transitions. [2022-03-01 17:34:26,514 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2755 transitions. Word has length 17 [2022-03-01 17:34:26,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:26,514 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2755 transitions. [2022-03-01 17:34:26,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:26,514 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2755 transitions. [2022-03-01 17:34:26,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:26,515 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:26,515 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:26,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (265)] Ended with exit code 0 [2022-03-01 17:34:26,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,265 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:26,715 INFO L402 AbstractCegarLoop]: === Iteration 275 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:26,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:26,715 INFO L85 PathProgramCache]: Analyzing trace with hash -1735427659, now seen corresponding path program 261 times [2022-03-01 17:34:26,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:26,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972435581] [2022-03-01 17:34:26,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:26,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:26,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:26,813 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:26,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972435581] [2022-03-01 17:34:26,813 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972435581] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:26,813 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239212623] [2022-03-01 17:34:26,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:26,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:26,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:26,814 INFO L229 MonitoredProcess]: Starting monitored process 266 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:26,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Waiting until timeout for monitored process [2022-03-01 17:34:26,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:34:26,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:26,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:27,020 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:27,021 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:27,023 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:27,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:27,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:27,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:27,155 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:27,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:27,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:27,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239212623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:27,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:27,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:27,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277968389] [2022-03-01 17:34:27,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:27,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:27,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:27,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:27,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:27,176 INFO L87 Difference]: Start difference. First operand 899 states and 2755 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:27,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:27,449 INFO L93 Difference]: Finished difference Result 981 states and 2945 transitions. [2022-03-01 17:34:27,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:34:27,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:27,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:27,450 INFO L225 Difference]: With dead ends: 981 [2022-03-01 17:34:27,450 INFO L226 Difference]: Without dead ends: 981 [2022-03-01 17:34:27,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:34:27,451 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 27 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:27,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 24 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 397 Invalid, 0 Unknown, 27 Unchecked, 0.1s Time] [2022-03-01 17:34:27,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2022-03-01 17:34:27,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 895. [2022-03-01 17:34:27,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 3.0704697986577183) internal successors, (2745), 894 states have internal predecessors, (2745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:27,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2745 transitions. [2022-03-01 17:34:27,461 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2745 transitions. Word has length 17 [2022-03-01 17:34:27,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:27,461 INFO L470 AbstractCegarLoop]: Abstraction has 895 states and 2745 transitions. [2022-03-01 17:34:27,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:27,461 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2745 transitions. [2022-03-01 17:34:27,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:27,462 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:27,462 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:27,478 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (266)] Ended with exit code 0 [2022-03-01 17:34:27,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable274 [2022-03-01 17:34:27,663 INFO L402 AbstractCegarLoop]: === Iteration 276 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:27,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:27,663 INFO L85 PathProgramCache]: Analyzing trace with hash 125354067, now seen corresponding path program 262 times [2022-03-01 17:34:27,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:27,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045203638] [2022-03-01 17:34:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:27,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:27,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:27,759 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:27,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045203638] [2022-03-01 17:34:27,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045203638] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:27,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979825115] [2022-03-01 17:34:27,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:27,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:27,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:27,761 INFO L229 MonitoredProcess]: Starting monitored process 267 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:27,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Waiting until timeout for monitored process [2022-03-01 17:34:27,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:27,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:27,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:27,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:27,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:27,932 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:27,934 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:27,934 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:27,960 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:27,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:28,051 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:28,051 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:28,052 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:28,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979825115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:28,071 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:28,071 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:28,071 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142798101] [2022-03-01 17:34:28,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:28,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:28,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:28,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:28,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:28,072 INFO L87 Difference]: Start difference. First operand 895 states and 2745 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:28,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:28,236 INFO L93 Difference]: Finished difference Result 969 states and 2921 transitions. [2022-03-01 17:34:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:34:28,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:28,237 INFO L225 Difference]: With dead ends: 969 [2022-03-01 17:34:28,237 INFO L226 Difference]: Without dead ends: 969 [2022-03-01 17:34:28,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:28,238 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 143 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:28,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 28 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 314 Invalid, 0 Unknown, 143 Unchecked, 0.1s Time] [2022-03-01 17:34:28,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 969 states. [2022-03-01 17:34:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 969 to 900. [2022-03-01 17:34:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 900 states, 899 states have (on average 3.0700778642936597) internal successors, (2760), 899 states have internal predecessors, (2760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:28,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 900 states to 900 states and 2760 transitions. [2022-03-01 17:34:28,248 INFO L78 Accepts]: Start accepts. Automaton has 900 states and 2760 transitions. Word has length 17 [2022-03-01 17:34:28,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:28,248 INFO L470 AbstractCegarLoop]: Abstraction has 900 states and 2760 transitions. [2022-03-01 17:34:28,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:28,248 INFO L276 IsEmpty]: Start isEmpty. Operand 900 states and 2760 transitions. [2022-03-01 17:34:28,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:28,249 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:28,249 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:28,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (267)] Ended with exit code 0 [2022-03-01 17:34:28,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,267 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:28,450 INFO L402 AbstractCegarLoop]: === Iteration 277 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:28,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash -833044709, now seen corresponding path program 263 times [2022-03-01 17:34:28,450 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:28,450 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297610255] [2022-03-01 17:34:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:28,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:28,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:28,547 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:28,547 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:28,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297610255] [2022-03-01 17:34:28,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297610255] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:28,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366934917] [2022-03-01 17:34:28,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:28,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:28,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:28,548 INFO L229 MonitoredProcess]: Starting monitored process 268 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:28,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Waiting until timeout for monitored process [2022-03-01 17:34:28,573 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:34:28,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:28,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:28,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:28,730 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:28,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:28,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:28,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:28,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:28,757 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:28,849 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:28,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:28,851 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:28,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:28,869 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366934917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:28,869 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:28,869 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:28,869 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200253758] [2022-03-01 17:34:28,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:28,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:28,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:28,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:28,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:28,870 INFO L87 Difference]: Start difference. First operand 900 states and 2760 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:29,047 INFO L93 Difference]: Finished difference Result 983 states and 2942 transitions. [2022-03-01 17:34:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:34:29,048 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:29,049 INFO L225 Difference]: With dead ends: 983 [2022-03-01 17:34:29,049 INFO L226 Difference]: Without dead ends: 983 [2022-03-01 17:34:29,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:29,049 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 206 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:29,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 28 Invalid, 574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 364 Invalid, 0 Unknown, 206 Unchecked, 0.1s Time] [2022-03-01 17:34:29,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 983 states. [2022-03-01 17:34:29,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 983 to 901. [2022-03-01 17:34:29,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 3.068888888888889) internal successors, (2762), 900 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:29,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 2762 transitions. [2022-03-01 17:34:29,060 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 2762 transitions. Word has length 17 [2022-03-01 17:34:29,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:29,060 INFO L470 AbstractCegarLoop]: Abstraction has 901 states and 2762 transitions. [2022-03-01 17:34:29,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:29,060 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 2762 transitions. [2022-03-01 17:34:29,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:29,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:29,061 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:29,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (268)] Ended with exit code 0 [2022-03-01 17:34:29,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2022-03-01 17:34:29,261 INFO L402 AbstractCegarLoop]: === Iteration 278 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:29,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:29,261 INFO L85 PathProgramCache]: Analyzing trace with hash -662342279, now seen corresponding path program 264 times [2022-03-01 17:34:29,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:29,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169294054] [2022-03-01 17:34:29,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:29,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:29,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:29,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:29,359 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:29,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169294054] [2022-03-01 17:34:29,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169294054] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:29,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315138574] [2022-03-01 17:34:29,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:29,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:29,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:29,360 INFO L229 MonitoredProcess]: Starting monitored process 269 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:29,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Waiting until timeout for monitored process [2022-03-01 17:34:29,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:34:29,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:29,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:29,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:29,558 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:29,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:29,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:29,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:29,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:29,681 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:29,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:29,682 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:29,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:29,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315138574] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:29,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:29,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:34:29,701 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292336249] [2022-03-01 17:34:29,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:29,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:29,701 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:29,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:29,701 INFO L87 Difference]: Start difference. First operand 901 states and 2762 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:29,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:29,897 INFO L93 Difference]: Finished difference Result 979 states and 2936 transitions. [2022-03-01 17:34:29,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:34:29,898 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:29,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:29,899 INFO L225 Difference]: With dead ends: 979 [2022-03-01 17:34:29,899 INFO L226 Difference]: Without dead ends: 979 [2022-03-01 17:34:29,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:29,899 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 224 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:29,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 28 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 416 Invalid, 0 Unknown, 224 Unchecked, 0.2s Time] [2022-03-01 17:34:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 979 states. [2022-03-01 17:34:29,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 979 to 899. [2022-03-01 17:34:29,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 3.0701559020044544) internal successors, (2757), 898 states have internal predecessors, (2757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:29,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2757 transitions. [2022-03-01 17:34:29,909 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2757 transitions. Word has length 17 [2022-03-01 17:34:29,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:29,910 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 2757 transitions. [2022-03-01 17:34:29,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:29,910 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2757 transitions. [2022-03-01 17:34:29,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:29,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:29,911 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:29,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (269)] Ended with exit code 0 [2022-03-01 17:34:30,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2022-03-01 17:34:30,111 INFO L402 AbstractCegarLoop]: === Iteration 279 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:30,111 INFO L85 PathProgramCache]: Analyzing trace with hash 150986867, now seen corresponding path program 265 times [2022-03-01 17:34:30,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:30,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848426132] [2022-03-01 17:34:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:30,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:30,210 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:30,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848426132] [2022-03-01 17:34:30,210 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848426132] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:30,210 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808266903] [2022-03-01 17:34:30,211 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:30,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:30,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:30,212 INFO L229 MonitoredProcess]: Starting monitored process 270 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:30,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Waiting until timeout for monitored process [2022-03-01 17:34:30,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:30,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:30,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:30,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:30,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:30,402 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:30,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:34:30,405 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:30,405 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:34:30,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:30,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:30,519 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:30,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:30,521 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:30,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808266903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:30,545 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:30,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:30,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151412161] [2022-03-01 17:34:30,545 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:30,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:30,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:30,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:30,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:30,545 INFO L87 Difference]: Start difference. First operand 899 states and 2757 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:30,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:30,953 INFO L93 Difference]: Finished difference Result 1067 states and 3100 transitions. [2022-03-01 17:34:30,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:34:30,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:30,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:30,955 INFO L225 Difference]: With dead ends: 1067 [2022-03-01 17:34:30,955 INFO L226 Difference]: Without dead ends: 1067 [2022-03-01 17:34:30,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:34:30,956 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 802 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:30,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 136 Invalid, 802 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:30,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2022-03-01 17:34:30,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 927. [2022-03-01 17:34:30,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.086393088552916) internal successors, (2858), 926 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:30,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2858 transitions. [2022-03-01 17:34:30,966 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2858 transitions. Word has length 17 [2022-03-01 17:34:30,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:30,966 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 2858 transitions. [2022-03-01 17:34:30,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:30,967 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2858 transitions. [2022-03-01 17:34:30,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:30,968 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:30,968 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:30,983 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (270)] Ended with exit code 0 [2022-03-01 17:34:31,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 270 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2022-03-01 17:34:31,168 INFO L402 AbstractCegarLoop]: === Iteration 280 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:31,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:31,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1705035991, now seen corresponding path program 266 times [2022-03-01 17:34:31,168 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:31,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980734324] [2022-03-01 17:34:31,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:31,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:31,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:31,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:31,265 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:31,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980734324] [2022-03-01 17:34:31,265 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980734324] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:31,265 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373453119] [2022-03-01 17:34:31,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:31,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:31,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:31,266 INFO L229 MonitoredProcess]: Starting monitored process 271 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:31,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Waiting until timeout for monitored process [2022-03-01 17:34:31,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:31,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:31,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:31,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:31,449 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:31,450 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:34:31,451 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:31,451 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:34:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:31,485 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:31,561 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:31,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:34:31,563 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:31,591 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373453119] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:31,591 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:31,591 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:34:31,591 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339495457] [2022-03-01 17:34:31,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:31,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:31,591 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:31,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:31,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:31,592 INFO L87 Difference]: Start difference. First operand 927 states and 2858 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:32,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:32,066 INFO L93 Difference]: Finished difference Result 1012 states and 2983 transitions. [2022-03-01 17:34:32,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:34:32,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:32,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:32,068 INFO L225 Difference]: With dead ends: 1012 [2022-03-01 17:34:32,068 INFO L226 Difference]: Without dead ends: 1006 [2022-03-01 17:34:32,068 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:34:32,068 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:32,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 108 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2022-03-01 17:34:32,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 930. [2022-03-01 17:34:32,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 930 states, 929 states have (on average 3.0764262648008613) internal successors, (2858), 929 states have internal predecessors, (2858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:32,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 930 states to 930 states and 2858 transitions. [2022-03-01 17:34:32,078 INFO L78 Accepts]: Start accepts. Automaton has 930 states and 2858 transitions. Word has length 17 [2022-03-01 17:34:32,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:32,079 INFO L470 AbstractCegarLoop]: Abstraction has 930 states and 2858 transitions. [2022-03-01 17:34:32,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:32,079 INFO L276 IsEmpty]: Start isEmpty. Operand 930 states and 2858 transitions. [2022-03-01 17:34:32,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:32,080 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:32,080 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:32,096 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (271)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:32,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2022-03-01 17:34:32,280 INFO L402 AbstractCegarLoop]: === Iteration 281 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:32,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:32,280 INFO L85 PathProgramCache]: Analyzing trace with hash 390629205, now seen corresponding path program 267 times [2022-03-01 17:34:32,280 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:32,281 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044449077] [2022-03-01 17:34:32,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:32,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:32,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:32,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:32,381 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:32,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044449077] [2022-03-01 17:34:32,381 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044449077] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:32,381 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014975071] [2022-03-01 17:34:32,381 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:32,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:32,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:32,383 INFO L229 MonitoredProcess]: Starting monitored process 272 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:32,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Waiting until timeout for monitored process [2022-03-01 17:34:32,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:34:32,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:32,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:32,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:32,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:32,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:32,575 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:32,575 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:34:32,578 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:32,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:34:32,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:32,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:32,706 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:32,707 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:32,708 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:32,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014975071] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:32,731 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:32,731 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:34:32,731 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115248360] [2022-03-01 17:34:32,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:32,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:34:32,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:32,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:34:32,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:32,732 INFO L87 Difference]: Start difference. First operand 930 states and 2858 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:33,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:33,778 INFO L93 Difference]: Finished difference Result 1134 states and 3238 transitions. [2022-03-01 17:34:33,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:34:33,778 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:33,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:33,780 INFO L225 Difference]: With dead ends: 1134 [2022-03-01 17:34:33,780 INFO L226 Difference]: Without dead ends: 1130 [2022-03-01 17:34:33,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:34:33,780 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 95 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 869 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:33,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 104 Invalid, 869 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:33,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-03-01 17:34:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 934. [2022-03-01 17:34:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.0793140407288315) internal successors, (2873), 933 states have internal predecessors, (2873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:33,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 2873 transitions. [2022-03-01 17:34:33,791 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 2873 transitions. Word has length 17 [2022-03-01 17:34:33,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:33,791 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 2873 transitions. [2022-03-01 17:34:33,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:33,791 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 2873 transitions. [2022-03-01 17:34:33,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:33,792 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:33,792 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:33,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (272)] Ended with exit code 0 [2022-03-01 17:34:33,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,272 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:33,993 INFO L402 AbstractCegarLoop]: === Iteration 282 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:33,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:33,993 INFO L85 PathProgramCache]: Analyzing trace with hash -529071503, now seen corresponding path program 268 times [2022-03-01 17:34:33,993 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:33,993 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934329110] [2022-03-01 17:34:33,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:33,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:34,094 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:34,094 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:34,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934329110] [2022-03-01 17:34:34,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934329110] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:34,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643736794] [2022-03-01 17:34:34,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:34,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:34,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:34,095 INFO L229 MonitoredProcess]: Starting monitored process 273 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:34,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Waiting until timeout for monitored process [2022-03-01 17:34:34,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:34,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:34,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:34,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:34,329 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:34,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:34:34,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:34,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:34:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:34,368 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:34,460 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:34,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:34:34,462 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:34,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:34,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643736794] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:34,490 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:34,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:34:34,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483111487] [2022-03-01 17:34:34,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:34,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:34:34,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:34,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:34:34,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:34,491 INFO L87 Difference]: Start difference. First operand 934 states and 2873 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:35,110 INFO L93 Difference]: Finished difference Result 1017 states and 3002 transitions. [2022-03-01 17:34:35,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:34:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:35,111 INFO L225 Difference]: With dead ends: 1017 [2022-03-01 17:34:35,111 INFO L226 Difference]: Without dead ends: 1011 [2022-03-01 17:34:35,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=182, Invalid=1224, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:34:35,111 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 83 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:35,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 88 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:35,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-03-01 17:34:35,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 938. [2022-03-01 17:34:35,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.062966915688367) internal successors, (2870), 937 states have internal predecessors, (2870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:35,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2870 transitions. [2022-03-01 17:34:35,122 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2870 transitions. Word has length 17 [2022-03-01 17:34:35,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:35,122 INFO L470 AbstractCegarLoop]: Abstraction has 938 states and 2870 transitions. [2022-03-01 17:34:35,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:35,122 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2870 transitions. [2022-03-01 17:34:35,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:35,123 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:35,124 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:35,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (273)] Ended with exit code 0 [2022-03-01 17:34:35,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2022-03-01 17:34:35,324 INFO L402 AbstractCegarLoop]: === Iteration 283 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:35,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:35,324 INFO L85 PathProgramCache]: Analyzing trace with hash 398359603, now seen corresponding path program 269 times [2022-03-01 17:34:35,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:35,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174845107] [2022-03-01 17:34:35,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:35,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:35,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:35,443 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:35,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174845107] [2022-03-01 17:34:35,443 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174845107] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:35,443 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772490189] [2022-03-01 17:34:35,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:35,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:35,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:35,444 INFO L229 MonitoredProcess]: Starting monitored process 274 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:35,445 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Waiting until timeout for monitored process [2022-03-01 17:34:35,470 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:34:35,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:35,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:35,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:35,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:35,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:35,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:35,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:35,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:35,773 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:35,773 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:35,774 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:35,797 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772490189] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:35,798 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:35,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:34:35,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249686711] [2022-03-01 17:34:35,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:35,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:34:35,798 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:35,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:34:35,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:35,798 INFO L87 Difference]: Start difference. First operand 938 states and 2870 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:36,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:36,831 INFO L93 Difference]: Finished difference Result 1183 states and 3273 transitions. [2022-03-01 17:34:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:34:36,831 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:36,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:36,833 INFO L225 Difference]: With dead ends: 1183 [2022-03-01 17:34:36,833 INFO L226 Difference]: Without dead ends: 1181 [2022-03-01 17:34:36,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=320, Invalid=2032, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:34:36,833 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 212 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:36,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 86 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:36,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-03-01 17:34:36,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 927. [2022-03-01 17:34:36,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 927 states, 926 states have (on average 3.0593952483801297) internal successors, (2833), 926 states have internal predecessors, (2833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:36,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 2833 transitions. [2022-03-01 17:34:36,844 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 2833 transitions. Word has length 17 [2022-03-01 17:34:36,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:36,845 INFO L470 AbstractCegarLoop]: Abstraction has 927 states and 2833 transitions. [2022-03-01 17:34:36,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:36,845 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 2833 transitions. [2022-03-01 17:34:36,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:36,846 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:36,846 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:36,861 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (274)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:37,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2022-03-01 17:34:37,046 INFO L402 AbstractCegarLoop]: === Iteration 284 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:37,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:37,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1199975831, now seen corresponding path program 270 times [2022-03-01 17:34:37,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:37,047 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842764721] [2022-03-01 17:34:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:37,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:37,150 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:37,150 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:37,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842764721] [2022-03-01 17:34:37,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842764721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:37,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68488180] [2022-03-01 17:34:37,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:37,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:37,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:37,151 INFO L229 MonitoredProcess]: Starting monitored process 275 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:37,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Waiting until timeout for monitored process [2022-03-01 17:34:37,176 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:34:37,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:37,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:37,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:37,307 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:37,307 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:37,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:37,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:37,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:37,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:37,486 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:37,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:34:37,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:37,516 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [68488180] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:37,516 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:37,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:34:37,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291449748] [2022-03-01 17:34:37,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:37,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:34:37,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:37,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:34:37,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:34:37,517 INFO L87 Difference]: Start difference. First operand 927 states and 2833 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:38,212 INFO L93 Difference]: Finished difference Result 1084 states and 3101 transitions. [2022-03-01 17:34:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:34:38,213 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:38,214 INFO L225 Difference]: With dead ends: 1084 [2022-03-01 17:34:38,214 INFO L226 Difference]: Without dead ends: 1079 [2022-03-01 17:34:38,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=1565, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:34:38,214 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 159 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:38,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 86 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2022-03-01 17:34:38,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 939. [2022-03-01 17:34:38,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 938 states have (on average 3.053304904051173) internal successors, (2864), 938 states have internal predecessors, (2864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:38,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 2864 transitions. [2022-03-01 17:34:38,229 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 2864 transitions. Word has length 17 [2022-03-01 17:34:38,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:38,229 INFO L470 AbstractCegarLoop]: Abstraction has 939 states and 2864 transitions. [2022-03-01 17:34:38,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:38,229 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 2864 transitions. [2022-03-01 17:34:38,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:38,230 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:38,230 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:38,246 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (275)] Ended with exit code 0 [2022-03-01 17:34:38,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,275 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:38,431 INFO L402 AbstractCegarLoop]: === Iteration 285 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:38,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:38,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1376647759, now seen corresponding path program 271 times [2022-03-01 17:34:38,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:38,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961462994] [2022-03-01 17:34:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:38,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:38,533 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:38,533 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961462994] [2022-03-01 17:34:38,534 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961462994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:38,534 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697694765] [2022-03-01 17:34:38,534 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:38,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:38,534 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:38,535 INFO L229 MonitoredProcess]: Starting monitored process 276 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:38,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Waiting until timeout for monitored process [2022-03-01 17:34:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:38,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:38,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:38,688 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:38,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:38,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:38,690 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:38,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:38,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:38,857 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:38,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:34:38,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:38,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:38,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697694765] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:38,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:38,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:34:38,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227518022] [2022-03-01 17:34:38,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:38,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:34:38,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:38,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:34:38,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:34:38,887 INFO L87 Difference]: Start difference. First operand 939 states and 2864 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:39,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:39,432 INFO L93 Difference]: Finished difference Result 1061 states and 3047 transitions. [2022-03-01 17:34:39,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:34:39,432 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:39,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:39,434 INFO L225 Difference]: With dead ends: 1061 [2022-03-01 17:34:39,434 INFO L226 Difference]: Without dead ends: 1061 [2022-03-01 17:34:39,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=189, Invalid=1001, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:34:39,434 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 78 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:39,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 106 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:39,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1061 states. [2022-03-01 17:34:39,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1061 to 898. [2022-03-01 17:34:39,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 3.0334448160535117) internal successors, (2721), 897 states have internal predecessors, (2721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:39,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2721 transitions. [2022-03-01 17:34:39,445 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2721 transitions. Word has length 17 [2022-03-01 17:34:39,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:39,445 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 2721 transitions. [2022-03-01 17:34:39,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:39,445 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2721 transitions. [2022-03-01 17:34:39,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:39,446 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:39,446 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:39,461 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (276)] Ended with exit code 0 [2022-03-01 17:34:39,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,276 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:39,646 INFO L402 AbstractCegarLoop]: === Iteration 286 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:39,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1216001127, now seen corresponding path program 272 times [2022-03-01 17:34:39,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:39,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236603223] [2022-03-01 17:34:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:39,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:34:39,734 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:39,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236603223] [2022-03-01 17:34:39,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236603223] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:39,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017113085] [2022-03-01 17:34:39,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:39,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:39,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:39,735 INFO L229 MonitoredProcess]: Starting monitored process 277 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:39,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Waiting until timeout for monitored process [2022-03-01 17:34:39,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:39,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:39,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:39,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:39,869 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:39,869 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:39,871 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:39,871 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:39,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:39,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:40,021 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:40,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:34:40,023 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:34:40,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:34:40,048 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017113085] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:40,048 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:40,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:34:40,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807175494] [2022-03-01 17:34:40,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:40,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:40,049 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:40,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:40,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:40,049 INFO L87 Difference]: Start difference. First operand 898 states and 2721 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:40,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:40,890 INFO L93 Difference]: Finished difference Result 1016 states and 2925 transitions. [2022-03-01 17:34:40,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-01 17:34:40,891 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:40,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:40,892 INFO L225 Difference]: With dead ends: 1016 [2022-03-01 17:34:40,892 INFO L226 Difference]: Without dead ends: 1012 [2022-03-01 17:34:40,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=2080, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:34:40,892 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 97 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 780 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:40,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 54 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 780 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:40,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1012 states. [2022-03-01 17:34:40,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1012 to 896. [2022-03-01 17:34:40,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 3.024581005586592) internal successors, (2707), 895 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:40,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2707 transitions. [2022-03-01 17:34:40,903 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2707 transitions. Word has length 17 [2022-03-01 17:34:40,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:40,903 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 2707 transitions. [2022-03-01 17:34:40,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:40,903 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2707 transitions. [2022-03-01 17:34:40,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:40,904 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:40,904 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:40,920 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (277)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:41,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,277 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:41,104 INFO L402 AbstractCegarLoop]: === Iteration 287 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:41,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:41,105 INFO L85 PathProgramCache]: Analyzing trace with hash -17960013, now seen corresponding path program 273 times [2022-03-01 17:34:41,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:41,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473590868] [2022-03-01 17:34:41,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:41,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:41,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:41,197 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:41,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473590868] [2022-03-01 17:34:41,197 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473590868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:41,197 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718496111] [2022-03-01 17:34:41,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:41,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:41,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:41,198 INFO L229 MonitoredProcess]: Starting monitored process 278 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:41,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Waiting until timeout for monitored process [2022-03-01 17:34:41,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:34:41,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:41,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:41,334 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:41,334 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:41,336 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:41,336 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:41,409 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:41,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:41,478 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:41,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:34:41,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:41,510 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:41,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718496111] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:41,510 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:41,511 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:34:41,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317206093] [2022-03-01 17:34:41,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:41,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:41,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:41,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:41,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:41,511 INFO L87 Difference]: Start difference. First operand 896 states and 2707 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:42,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:42,000 INFO L93 Difference]: Finished difference Result 984 states and 2843 transitions. [2022-03-01 17:34:42,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:34:42,000 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:42,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:42,002 INFO L225 Difference]: With dead ends: 984 [2022-03-01 17:34:42,002 INFO L226 Difference]: Without dead ends: 980 [2022-03-01 17:34:42,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:34:42,002 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 103 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 684 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:42,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 54 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 684 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:42,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2022-03-01 17:34:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 888. [2022-03-01 17:34:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 887 states have (on average 3.011273957158963) internal successors, (2671), 887 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 2671 transitions. [2022-03-01 17:34:42,012 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 2671 transitions. Word has length 17 [2022-03-01 17:34:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:42,012 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 2671 transitions. [2022-03-01 17:34:42,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 2671 transitions. [2022-03-01 17:34:42,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:42,013 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:42,013 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:42,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (278)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:42,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,278 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:42,214 INFO L402 AbstractCegarLoop]: === Iteration 288 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:42,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:42,214 INFO L85 PathProgramCache]: Analyzing trace with hash 783656215, now seen corresponding path program 274 times [2022-03-01 17:34:42,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:42,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199851088] [2022-03-01 17:34:42,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:42,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:42,323 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:42,323 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:42,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199851088] [2022-03-01 17:34:42,323 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199851088] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:42,323 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897945779] [2022-03-01 17:34:42,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:42,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:42,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:42,328 INFO L229 MonitoredProcess]: Starting monitored process 279 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:42,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Waiting until timeout for monitored process [2022-03-01 17:34:42,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:42,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:42,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:42,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:42,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:42,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:42,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:42,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:42,537 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:42,605 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:42,605 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:34:42,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:34:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:42,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897945779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:42,632 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:42,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:34:42,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816351065] [2022-03-01 17:34:42,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:42,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:42,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:42,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:42,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:42,633 INFO L87 Difference]: Start difference. First operand 888 states and 2671 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:43,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:43,268 INFO L93 Difference]: Finished difference Result 1028 states and 2963 transitions. [2022-03-01 17:34:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:34:43,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:43,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:43,269 INFO L225 Difference]: With dead ends: 1028 [2022-03-01 17:34:43,269 INFO L226 Difference]: Without dead ends: 1022 [2022-03-01 17:34:43,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:34:43,270 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 88 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:43,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 44 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 677 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:43,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1022 states. [2022-03-01 17:34:43,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1022 to 906. [2022-03-01 17:34:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 906 states, 905 states have (on average 3.0099447513812154) internal successors, (2724), 905 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:43,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 906 states to 906 states and 2724 transitions. [2022-03-01 17:34:43,280 INFO L78 Accepts]: Start accepts. Automaton has 906 states and 2724 transitions. Word has length 17 [2022-03-01 17:34:43,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:43,280 INFO L470 AbstractCegarLoop]: Abstraction has 906 states and 2724 transitions. [2022-03-01 17:34:43,280 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:43,280 INFO L276 IsEmpty]: Start isEmpty. Operand 906 states and 2724 transitions. [2022-03-01 17:34:43,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:43,281 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:43,281 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:43,297 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (279)] Ended with exit code 0 [2022-03-01 17:34:43,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 279 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2022-03-01 17:34:43,482 INFO L402 AbstractCegarLoop]: === Iteration 289 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:43,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:43,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1792967375, now seen corresponding path program 275 times [2022-03-01 17:34:43,482 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:43,482 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40132988] [2022-03-01 17:34:43,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:43,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:43,570 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:43,571 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:43,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40132988] [2022-03-01 17:34:43,571 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40132988] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:43,571 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233106933] [2022-03-01 17:34:43,571 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:43,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:43,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:43,572 INFO L229 MonitoredProcess]: Starting monitored process 280 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:43,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Waiting until timeout for monitored process [2022-03-01 17:34:43,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:34:43,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:43,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:43,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:43,714 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:43,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:43,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:43,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:43,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:43,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:43,860 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:43,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:34:43,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:34:43,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:43,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233106933] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:43,887 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:43,887 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:34:43,887 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494878340] [2022-03-01 17:34:43,887 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:43,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:43,887 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:43,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:43,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:43,888 INFO L87 Difference]: Start difference. First operand 906 states and 2724 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:44,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:44,352 INFO L93 Difference]: Finished difference Result 1029 states and 2946 transitions. [2022-03-01 17:34:44,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:34:44,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:44,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:44,354 INFO L225 Difference]: With dead ends: 1029 [2022-03-01 17:34:44,354 INFO L226 Difference]: Without dead ends: 1027 [2022-03-01 17:34:44,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:34:44,354 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 652 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 652 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:44,354 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 50 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 652 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:34:44,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2022-03-01 17:34:44,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 884. [2022-03-01 17:34:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.9898074745186864) internal successors, (2640), 883 states have internal predecessors, (2640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:44,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2640 transitions. [2022-03-01 17:34:44,364 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2640 transitions. Word has length 17 [2022-03-01 17:34:44,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:44,364 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 2640 transitions. [2022-03-01 17:34:44,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:44,364 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2640 transitions. [2022-03-01 17:34:44,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:44,365 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:44,365 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:44,380 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (280)] Ended with exit code 0 [2022-03-01 17:34:44,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2022-03-01 17:34:44,565 INFO L402 AbstractCegarLoop]: === Iteration 290 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:44,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:44,566 INFO L85 PathProgramCache]: Analyzing trace with hash 791386613, now seen corresponding path program 276 times [2022-03-01 17:34:44,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:44,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286583471] [2022-03-01 17:34:44,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:44,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:44,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:44,647 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:44,648 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:44,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286583471] [2022-03-01 17:34:44,648 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286583471] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:44,648 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964978519] [2022-03-01 17:34:44,648 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:44,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:44,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:44,649 INFO L229 MonitoredProcess]: Starting monitored process 281 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:44,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Waiting until timeout for monitored process [2022-03-01 17:34:44,674 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:34:44,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:44,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:44,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:44,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:44,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:44,812 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:44,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:44,837 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:44,912 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:34:44,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:34:44,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:34:44,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:44,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964978519] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:44,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:44,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:34:44,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393715] [2022-03-01 17:34:44,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:44,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:44,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:44,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:44,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:44,940 INFO L87 Difference]: Start difference. First operand 884 states and 2640 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:45,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:45,245 INFO L93 Difference]: Finished difference Result 968 states and 2804 transitions. [2022-03-01 17:34:45,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:34:45,245 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:45,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:45,247 INFO L225 Difference]: With dead ends: 968 [2022-03-01 17:34:45,247 INFO L226 Difference]: Without dead ends: 968 [2022-03-01 17:34:45,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:34:45,247 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:45,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 48 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 577 Invalid, 0 Unknown, 46 Unchecked, 0.2s Time] [2022-03-01 17:34:45,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-03-01 17:34:45,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 871. [2022-03-01 17:34:45,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 871 states, 870 states have (on average 2.9885057471264367) internal successors, (2600), 870 states have internal predecessors, (2600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:45,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 871 states to 871 states and 2600 transitions. [2022-03-01 17:34:45,257 INFO L78 Accepts]: Start accepts. Automaton has 871 states and 2600 transitions. Word has length 17 [2022-03-01 17:34:45,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:45,257 INFO L470 AbstractCegarLoop]: Abstraction has 871 states and 2600 transitions. [2022-03-01 17:34:45,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:45,257 INFO L276 IsEmpty]: Start isEmpty. Operand 871 states and 2600 transitions. [2022-03-01 17:34:45,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:45,258 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:45,258 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:45,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (281)] Ended with exit code 0 [2022-03-01 17:34:45,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2022-03-01 17:34:45,458 INFO L402 AbstractCegarLoop]: === Iteration 291 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:45,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:45,459 INFO L85 PathProgramCache]: Analyzing trace with hash -38966221, now seen corresponding path program 277 times [2022-03-01 17:34:45,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:45,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989316251] [2022-03-01 17:34:45,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:45,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:45,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:45,558 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:45,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989316251] [2022-03-01 17:34:45,558 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989316251] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:45,558 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744890212] [2022-03-01 17:34:45,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:45,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:45,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:45,559 INFO L229 MonitoredProcess]: Starting monitored process 282 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:45,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Waiting until timeout for monitored process [2022-03-01 17:34:45,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:45,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:45,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:45,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:45,712 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:45,713 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:45,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:45,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:45,875 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:45,875 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:34:45,877 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:45,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744890212] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:45,903 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:45,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:34:45,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676528263] [2022-03-01 17:34:45,903 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:45,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:45,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:45,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:45,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:45,903 INFO L87 Difference]: Start difference. First operand 871 states and 2600 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:46,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:46,317 INFO L93 Difference]: Finished difference Result 986 states and 2819 transitions. [2022-03-01 17:34:46,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:34:46,317 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:46,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:46,319 INFO L225 Difference]: With dead ends: 986 [2022-03-01 17:34:46,319 INFO L226 Difference]: Without dead ends: 984 [2022-03-01 17:34:46,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:34:46,319 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 94 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 577 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:46,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 48 Invalid, 577 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 552 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:34:46,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-03-01 17:34:46,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 885. [2022-03-01 17:34:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.994343891402715) internal successors, (2647), 884 states have internal predecessors, (2647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:46,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 2647 transitions. [2022-03-01 17:34:46,335 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 2647 transitions. Word has length 17 [2022-03-01 17:34:46,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:46,335 INFO L470 AbstractCegarLoop]: Abstraction has 885 states and 2647 transitions. [2022-03-01 17:34:46,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:46,335 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 2647 transitions. [2022-03-01 17:34:46,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:46,336 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:46,336 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:46,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (282)] Ended with exit code 0 [2022-03-01 17:34:46,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,282 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:46,537 INFO L402 AbstractCegarLoop]: === Iteration 292 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:46,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:46,537 INFO L85 PathProgramCache]: Analyzing trace with hash 762650007, now seen corresponding path program 278 times [2022-03-01 17:34:46,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:46,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013583788] [2022-03-01 17:34:46,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:46,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:46,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:46,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:46,630 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:46,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013583788] [2022-03-01 17:34:46,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013583788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:46,630 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583699877] [2022-03-01 17:34:46,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:46,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:46,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:46,632 INFO L229 MonitoredProcess]: Starting monitored process 283 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:46,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Waiting until timeout for monitored process [2022-03-01 17:34:46,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:46,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:46,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:46,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:46,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:46,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:46,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:46,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:46,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:46,960 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:46,960 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:46,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:46,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:46,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583699877] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:46,983 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:46,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:34:46,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171319919] [2022-03-01 17:34:46,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:46,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:34:46,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:46,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:34:46,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:34:46,983 INFO L87 Difference]: Start difference. First operand 885 states and 2647 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:48,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:48,158 INFO L93 Difference]: Finished difference Result 1132 states and 3141 transitions. [2022-03-01 17:34:48,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-03-01 17:34:48,158 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:48,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:48,160 INFO L225 Difference]: With dead ends: 1132 [2022-03-01 17:34:48,160 INFO L226 Difference]: Without dead ends: 1121 [2022-03-01 17:34:48,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:34:48,160 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 131 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:48,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 52 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:48,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1121 states. [2022-03-01 17:34:48,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1121 to 908. [2022-03-01 17:34:48,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 3.0011025358324144) internal successors, (2722), 907 states have internal predecessors, (2722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:48,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2722 transitions. [2022-03-01 17:34:48,171 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2722 transitions. Word has length 17 [2022-03-01 17:34:48,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:48,171 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2722 transitions. [2022-03-01 17:34:48,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:48,171 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2722 transitions. [2022-03-01 17:34:48,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:48,172 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:48,172 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:48,188 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (283)] Ended with exit code 0 [2022-03-01 17:34:48,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable291 [2022-03-01 17:34:48,372 INFO L402 AbstractCegarLoop]: === Iteration 293 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:48,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:48,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1813973583, now seen corresponding path program 279 times [2022-03-01 17:34:48,373 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:48,373 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481240192] [2022-03-01 17:34:48,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:48,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:48,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:48,460 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:48,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481240192] [2022-03-01 17:34:48,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481240192] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:48,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752447302] [2022-03-01 17:34:48,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:48,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:48,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:48,461 INFO L229 MonitoredProcess]: Starting monitored process 284 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:48,466 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Waiting until timeout for monitored process [2022-03-01 17:34:48,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:34:48,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:48,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:48,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:48,616 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:48,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:48,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:48,618 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:48,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:48,769 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:48,770 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:48,771 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:48,792 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:48,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752447302] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:48,793 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:48,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:34:48,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054702977] [2022-03-01 17:34:48,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:48,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:48,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:48,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:48,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:48,793 INFO L87 Difference]: Start difference. First operand 908 states and 2722 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:49,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:49,660 INFO L93 Difference]: Finished difference Result 1105 states and 3080 transitions. [2022-03-01 17:34:49,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:34:49,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:49,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:49,662 INFO L225 Difference]: With dead ends: 1105 [2022-03-01 17:34:49,662 INFO L226 Difference]: Without dead ends: 1099 [2022-03-01 17:34:49,662 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1536, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:34:49,662 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 58 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:49,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 30 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:34:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2022-03-01 17:34:49,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 882. [2022-03-01 17:34:49,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 2.977298524404086) internal successors, (2623), 881 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:49,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 2623 transitions. [2022-03-01 17:34:49,673 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 2623 transitions. Word has length 17 [2022-03-01 17:34:49,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:49,673 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 2623 transitions. [2022-03-01 17:34:49,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:49,673 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 2623 transitions. [2022-03-01 17:34:49,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:49,674 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:49,674 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:49,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (284)] Ended with exit code 0 [2022-03-01 17:34:49,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,284 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:49,875 INFO L402 AbstractCegarLoop]: === Iteration 294 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:49,875 INFO L85 PathProgramCache]: Analyzing trace with hash 770380405, now seen corresponding path program 280 times [2022-03-01 17:34:49,875 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:49,875 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877794756] [2022-03-01 17:34:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:49,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:49,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:49,959 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:49,959 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:49,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877794756] [2022-03-01 17:34:49,960 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877794756] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:49,960 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797193929] [2022-03-01 17:34:49,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:49,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:49,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:49,961 INFO L229 MonitoredProcess]: Starting monitored process 285 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:49,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Waiting until timeout for monitored process [2022-03-01 17:34:49,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:49,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:49,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:49,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:50,137 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:50,137 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:50,139 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:50,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:50,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:50,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:50,258 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:50,258 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:50,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:50,281 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797193929] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:50,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:50,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:34:50,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622419251] [2022-03-01 17:34:50,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:50,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:34:50,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:34:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:34:50,282 INFO L87 Difference]: Start difference. First operand 882 states and 2623 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:50,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:50,948 INFO L93 Difference]: Finished difference Result 1018 states and 2895 transitions. [2022-03-01 17:34:50,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:34:50,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:50,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:50,950 INFO L225 Difference]: With dead ends: 1018 [2022-03-01 17:34:50,950 INFO L226 Difference]: Without dead ends: 1018 [2022-03-01 17:34:50,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:34:50,950 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 37 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 74 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:50,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 30 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 683 Invalid, 0 Unknown, 74 Unchecked, 0.3s Time] [2022-03-01 17:34:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2022-03-01 17:34:50,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 879. [2022-03-01 17:34:50,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.9760820045558085) internal successors, (2613), 878 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:50,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2613 transitions. [2022-03-01 17:34:50,960 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2613 transitions. Word has length 17 [2022-03-01 17:34:50,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:50,960 INFO L470 AbstractCegarLoop]: Abstraction has 879 states and 2613 transitions. [2022-03-01 17:34:50,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:50,960 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2613 transitions. [2022-03-01 17:34:50,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:50,961 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:50,961 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:50,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (285)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:51,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,285 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:51,162 INFO L402 AbstractCegarLoop]: === Iteration 295 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:51,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:51,162 INFO L85 PathProgramCache]: Analyzing trace with hash -719024591, now seen corresponding path program 281 times [2022-03-01 17:34:51,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:51,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630309580] [2022-03-01 17:34:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:51,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:51,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:51,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:51,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630309580] [2022-03-01 17:34:51,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630309580] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:51,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411849223] [2022-03-01 17:34:51,247 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:34:51,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:51,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:51,248 INFO L229 MonitoredProcess]: Starting monitored process 286 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:51,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Waiting until timeout for monitored process [2022-03-01 17:34:51,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:34:51,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:51,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:51,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:51,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:51,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:51,424 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:51,424 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:51,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:51,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:51,533 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:51,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:51,535 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:51,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:51,556 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411849223] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:51,556 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:51,556 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:34:51,556 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584688876] [2022-03-01 17:34:51,556 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:51,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:34:51,556 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:51,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:34:51,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:34:51,557 INFO L87 Difference]: Start difference. First operand 879 states and 2613 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:51,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:51,785 INFO L93 Difference]: Finished difference Result 961 states and 2776 transitions. [2022-03-01 17:34:51,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:34:51,785 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:51,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:51,786 INFO L225 Difference]: With dead ends: 961 [2022-03-01 17:34:51,786 INFO L226 Difference]: Without dead ends: 961 [2022-03-01 17:34:51,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:34:51,786 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 30 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:51,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 24 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 485 Invalid, 0 Unknown, 136 Unchecked, 0.2s Time] [2022-03-01 17:34:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2022-03-01 17:34:51,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 873. [2022-03-01 17:34:51,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 873 states, 872 states have (on average 2.977064220183486) internal successors, (2596), 872 states have internal predecessors, (2596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:51,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 2596 transitions. [2022-03-01 17:34:51,796 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 2596 transitions. Word has length 17 [2022-03-01 17:34:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:51,796 INFO L470 AbstractCegarLoop]: Abstraction has 873 states and 2596 transitions. [2022-03-01 17:34:51,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 2596 transitions. [2022-03-01 17:34:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:51,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:51,797 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:51,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (286)] Ended with exit code 0 [2022-03-01 17:34:51,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,286 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:51,998 INFO L402 AbstractCegarLoop]: === Iteration 296 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:51,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:51,998 INFO L85 PathProgramCache]: Analyzing trace with hash -690158669, now seen corresponding path program 282 times [2022-03-01 17:34:51,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:51,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620836752] [2022-03-01 17:34:51,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:51,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:52,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:52,108 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:52,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620836752] [2022-03-01 17:34:52,108 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620836752] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:52,108 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216299012] [2022-03-01 17:34:52,108 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:34:52,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:52,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:52,109 INFO L229 MonitoredProcess]: Starting monitored process 287 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:52,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Waiting until timeout for monitored process [2022-03-01 17:34:52,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:34:52,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:52,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:52,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:52,286 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:52,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:52,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:52,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:52,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:52,364 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:52,477 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:52,477 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:34:52,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:34:52,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:52,503 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216299012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:52,503 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:52,503 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:34:52,503 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383359803] [2022-03-01 17:34:52,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:52,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:34:52,503 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:34:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:34:52,503 INFO L87 Difference]: Start difference. First operand 873 states and 2596 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:52,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:52,885 INFO L93 Difference]: Finished difference Result 1030 states and 2883 transitions. [2022-03-01 17:34:52,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:34:52,885 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:52,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:52,887 INFO L225 Difference]: With dead ends: 1030 [2022-03-01 17:34:52,887 INFO L226 Difference]: Without dead ends: 1030 [2022-03-01 17:34:52,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:34:52,887 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 133 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:52,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 88 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:34:52,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-03-01 17:34:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 893. [2022-03-01 17:34:52,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.9854260089686098) internal successors, (2663), 892 states have internal predecessors, (2663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2663 transitions. [2022-03-01 17:34:52,897 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2663 transitions. Word has length 17 [2022-03-01 17:34:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:52,897 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 2663 transitions. [2022-03-01 17:34:52,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2663 transitions. [2022-03-01 17:34:52,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:52,898 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:52,898 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:52,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (287)] Ended with exit code 0 [2022-03-01 17:34:53,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,287 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:53,099 INFO L402 AbstractCegarLoop]: === Iteration 297 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash 111457559, now seen corresponding path program 283 times [2022-03-01 17:34:53,099 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:53,099 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720040070] [2022-03-01 17:34:53,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:53,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:53,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:53,199 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:53,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720040070] [2022-03-01 17:34:53,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720040070] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:53,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839384813] [2022-03-01 17:34:53,200 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:34:53,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:53,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:53,201 INFO L229 MonitoredProcess]: Starting monitored process 288 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:53,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Waiting until timeout for monitored process [2022-03-01 17:34:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:53,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:53,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:53,369 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:53,369 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:53,373 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:53,373 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:53,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:53,574 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:53,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:53,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:53,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839384813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:53,594 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:53,594 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:34:53,594 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123734005] [2022-03-01 17:34:53,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:53,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:34:53,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:34:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:34:53,595 INFO L87 Difference]: Start difference. First operand 893 states and 2663 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:55,184 INFO L93 Difference]: Finished difference Result 1095 states and 3017 transitions. [2022-03-01 17:34:55,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:34:55,184 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:55,186 INFO L225 Difference]: With dead ends: 1095 [2022-03-01 17:34:55,186 INFO L226 Difference]: Without dead ends: 1085 [2022-03-01 17:34:55,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 892 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=423, Invalid=2999, Unknown=0, NotChecked=0, Total=3422 [2022-03-01 17:34:55,186 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 149 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 1204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:55,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 88 Invalid, 1204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:34:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1085 states. [2022-03-01 17:34:55,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1085 to 912. [2022-03-01 17:34:55,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.9890230515916576) internal successors, (2723), 911 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:55,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 2723 transitions. [2022-03-01 17:34:55,196 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 2723 transitions. Word has length 17 [2022-03-01 17:34:55,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:55,196 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 2723 transitions. [2022-03-01 17:34:55,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:55,196 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 2723 transitions. [2022-03-01 17:34:55,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:55,197 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:55,197 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:55,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (288)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:55,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,288 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:55,398 INFO L402 AbstractCegarLoop]: === Iteration 298 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:55,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:55,398 INFO L85 PathProgramCache]: Analyzing trace with hash 1829801265, now seen corresponding path program 284 times [2022-03-01 17:34:55,398 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:55,398 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141203256] [2022-03-01 17:34:55,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:55,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:55,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:55,498 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:55,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141203256] [2022-03-01 17:34:55,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141203256] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:55,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388983583] [2022-03-01 17:34:55,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:34:55,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:55,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:55,499 INFO L229 MonitoredProcess]: Starting monitored process 289 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:55,500 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Waiting until timeout for monitored process [2022-03-01 17:34:55,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:34:55,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:55,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:55,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:55,668 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:55,669 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:34:55,670 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:55,670 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:34:55,731 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:55,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:55,845 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:55,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:55,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:55,866 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:55,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388983583] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:55,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:55,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:34:55,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493064071] [2022-03-01 17:34:55,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:55,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:34:55,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:55,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:34:55,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:34:55,867 INFO L87 Difference]: Start difference. First operand 912 states and 2723 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:57,075 INFO L93 Difference]: Finished difference Result 1096 states and 3031 transitions. [2022-03-01 17:34:57,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:34:57,075 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:57,077 INFO L225 Difference]: With dead ends: 1096 [2022-03-01 17:34:57,077 INFO L226 Difference]: Without dead ends: 1096 [2022-03-01 17:34:57,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=324, Invalid=2028, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:34:57,077 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 96 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1047 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1047 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:57,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 64 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1047 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:34:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-03-01 17:34:57,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 892. [2022-03-01 17:34:57,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 892 states, 891 states have (on average 2.9753086419753085) internal successors, (2651), 891 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:57,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 892 states to 892 states and 2651 transitions. [2022-03-01 17:34:57,088 INFO L78 Accepts]: Start accepts. Automaton has 892 states and 2651 transitions. Word has length 17 [2022-03-01 17:34:57,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:57,088 INFO L470 AbstractCegarLoop]: Abstraction has 892 states and 2651 transitions. [2022-03-01 17:34:57,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:57,088 INFO L276 IsEmpty]: Start isEmpty. Operand 892 states and 2651 transitions. [2022-03-01 17:34:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:57,089 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:57,089 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:57,105 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (289)] Ended with exit code 0 [2022-03-01 17:34:57,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,289 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:57,289 INFO L402 AbstractCegarLoop]: === Iteration 299 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:57,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:57,289 INFO L85 PathProgramCache]: Analyzing trace with hash 119187957, now seen corresponding path program 285 times [2022-03-01 17:34:57,290 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:57,290 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781917713] [2022-03-01 17:34:57,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:57,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:57,391 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:57,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781917713] [2022-03-01 17:34:57,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781917713] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:57,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258321216] [2022-03-01 17:34:57,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:34:57,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:57,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:57,392 INFO L229 MonitoredProcess]: Starting monitored process 290 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:57,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Waiting until timeout for monitored process [2022-03-01 17:34:57,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:34:57,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:57,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:57,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:57,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:57,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:57,592 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:57,592 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:57,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:57,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:57,739 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:57,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:57,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:57,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:57,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258321216] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:57,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:57,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:34:57,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598222929] [2022-03-01 17:34:57,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:57,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:34:57,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:57,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:34:57,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:34:57,761 INFO L87 Difference]: Start difference. First operand 892 states and 2651 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:58,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:34:58,777 INFO L93 Difference]: Finished difference Result 1056 states and 2963 transitions. [2022-03-01 17:34:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:34:58,777 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:34:58,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:34:58,779 INFO L225 Difference]: With dead ends: 1056 [2022-03-01 17:34:58,779 INFO L226 Difference]: Without dead ends: 1056 [2022-03-01 17:34:58,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:34:58,779 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 73 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:34:58,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 48 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 753 Invalid, 0 Unknown, 42 Unchecked, 0.3s Time] [2022-03-01 17:34:58,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-03-01 17:34:58,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 908. [2022-03-01 17:34:58,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 908 states, 907 states have (on average 2.9746416758544654) internal successors, (2698), 907 states have internal predecessors, (2698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 908 states to 908 states and 2698 transitions. [2022-03-01 17:34:58,789 INFO L78 Accepts]: Start accepts. Automaton has 908 states and 2698 transitions. Word has length 17 [2022-03-01 17:34:58,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:34:58,789 INFO L470 AbstractCegarLoop]: Abstraction has 908 states and 2698 transitions. [2022-03-01 17:34:58,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:34:58,790 INFO L276 IsEmpty]: Start isEmpty. Operand 908 states and 2698 transitions. [2022-03-01 17:34:58,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:34:58,790 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:34:58,791 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:34:58,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (290)] Forceful destruction successful, exit code 0 [2022-03-01 17:34:58,992 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2022-03-01 17:34:58,992 INFO L402 AbstractCegarLoop]: === Iteration 300 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:34:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:34:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1726709143, now seen corresponding path program 286 times [2022-03-01 17:34:58,992 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:34:58,992 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122508118] [2022-03-01 17:34:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:34:58,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:34:58,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:34:59,101 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:59,102 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:34:59,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122508118] [2022-03-01 17:34:59,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122508118] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:34:59,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959877581] [2022-03-01 17:34:59,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:34:59,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:34:59,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:34:59,103 INFO L229 MonitoredProcess]: Starting monitored process 291 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:34:59,103 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Waiting until timeout for monitored process [2022-03-01 17:34:59,126 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:34:59,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:34:59,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:34:59,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:34:59,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:59,309 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:34:59,311 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:34:59,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:34:59,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:59,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:34:59,459 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:34:59,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:34:59,461 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:34:59,486 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:34:59,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959877581] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:34:59,486 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:34:59,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:34:59,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933046846] [2022-03-01 17:34:59,486 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:34:59,486 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:34:59,486 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:34:59,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:34:59,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:34:59,487 INFO L87 Difference]: Start difference. First operand 908 states and 2698 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:00,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:00,527 INFO L93 Difference]: Finished difference Result 1030 states and 2908 transitions. [2022-03-01 17:35:00,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-03-01 17:35:00,528 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:00,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:00,529 INFO L225 Difference]: With dead ends: 1030 [2022-03-01 17:35:00,529 INFO L226 Difference]: Without dead ends: 1030 [2022-03-01 17:35:00,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=333, Invalid=1923, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:35:00,529 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 67 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:00,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 44 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 682 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-03-01 17:35:00,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2022-03-01 17:35:00,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 894. [2022-03-01 17:35:00,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 2.9697648376259798) internal successors, (2652), 893 states have internal predecessors, (2652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:00,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2652 transitions. [2022-03-01 17:35:00,539 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2652 transitions. Word has length 17 [2022-03-01 17:35:00,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:00,539 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 2652 transitions. [2022-03-01 17:35:00,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:00,540 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2652 transitions. [2022-03-01 17:35:00,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:00,540 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:00,541 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:00,556 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (291)] Ended with exit code 0 [2022-03-01 17:35:00,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2022-03-01 17:35:00,741 INFO L402 AbstractCegarLoop]: === Iteration 301 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:00,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:00,741 INFO L85 PathProgramCache]: Analyzing trace with hash 1897411573, now seen corresponding path program 287 times [2022-03-01 17:35:00,741 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:00,741 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711367226] [2022-03-01 17:35:00,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:00,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:00,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:00,839 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:00,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711367226] [2022-03-01 17:35:00,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711367226] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:00,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235877914] [2022-03-01 17:35:00,840 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:00,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:00,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:00,841 INFO L229 MonitoredProcess]: Starting monitored process 292 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:00,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Waiting until timeout for monitored process [2022-03-01 17:35:00,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:35:00,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:00,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:01,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:01,071 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:01,073 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:01,074 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:01,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:01,223 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:01,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:01,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:01,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:01,243 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235877914] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:01,243 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:01,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:35:01,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364439691] [2022-03-01 17:35:01,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:01,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:35:01,244 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:01,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:35:01,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:35:01,244 INFO L87 Difference]: Start difference. First operand 894 states and 2652 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:02,262 INFO L93 Difference]: Finished difference Result 1028 states and 2904 transitions. [2022-03-01 17:35:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:35:02,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:02,263 INFO L225 Difference]: With dead ends: 1028 [2022-03-01 17:35:02,263 INFO L226 Difference]: Without dead ends: 1028 [2022-03-01 17:35:02,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:35:02,264 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 71 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:02,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 28 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 738 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-03-01 17:35:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1028 states. [2022-03-01 17:35:02,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1028 to 893. [2022-03-01 17:35:02,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 893 states, 892 states have (on average 2.9708520179372195) internal successors, (2650), 892 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:02,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 893 states to 893 states and 2650 transitions. [2022-03-01 17:35:02,274 INFO L78 Accepts]: Start accepts. Automaton has 893 states and 2650 transitions. Word has length 17 [2022-03-01 17:35:02,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:02,274 INFO L470 AbstractCegarLoop]: Abstraction has 893 states and 2650 transitions. [2022-03-01 17:35:02,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:02,274 INFO L276 IsEmpty]: Start isEmpty. Operand 893 states and 2650 transitions. [2022-03-01 17:35:02,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:02,275 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:02,275 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:02,290 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (292)] Ended with exit code 0 [2022-03-01 17:35:02,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2022-03-01 17:35:02,475 INFO L402 AbstractCegarLoop]: === Iteration 302 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:02,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1370217039, now seen corresponding path program 288 times [2022-03-01 17:35:02,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:02,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226356836] [2022-03-01 17:35:02,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:02,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:02,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:02,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226356836] [2022-03-01 17:35:02,586 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226356836] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:02,586 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802558226] [2022-03-01 17:35:02,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:02,586 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:02,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:02,587 INFO L229 MonitoredProcess]: Starting monitored process 293 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:02,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Waiting until timeout for monitored process [2022-03-01 17:35:02,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:35:02,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:02,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:02,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:02,780 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:02,780 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:02,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:02,783 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:02,807 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:02,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:02,909 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:02,909 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:02,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:02,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802558226] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:02,929 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:02,930 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:35:02,930 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380568211] [2022-03-01 17:35:02,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:02,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:02,930 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:02,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:02,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:02,930 INFO L87 Difference]: Start difference. First operand 893 states and 2650 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:03,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:03,819 INFO L93 Difference]: Finished difference Result 1015 states and 2891 transitions. [2022-03-01 17:35:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:35:03,819 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:03,821 INFO L225 Difference]: With dead ends: 1015 [2022-03-01 17:35:03,821 INFO L226 Difference]: Without dead ends: 1015 [2022-03-01 17:35:03,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:35:03,821 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 53 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 146 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:03,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 24 Invalid, 892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 727 Invalid, 0 Unknown, 146 Unchecked, 0.3s Time] [2022-03-01 17:35:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1015 states. [2022-03-01 17:35:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1015 to 891. [2022-03-01 17:35:03,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.9696629213483146) internal successors, (2643), 890 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:03,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2643 transitions. [2022-03-01 17:35:03,836 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2643 transitions. Word has length 17 [2022-03-01 17:35:03,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:03,836 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2643 transitions. [2022-03-01 17:35:03,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:03,837 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2643 transitions. [2022-03-01 17:35:03,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:03,837 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:03,838 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:03,853 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (293)] Ended with exit code 0 [2022-03-01 17:35:04,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2022-03-01 17:35:04,038 INFO L402 AbstractCegarLoop]: === Iteration 303 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:04,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:04,038 INFO L85 PathProgramCache]: Analyzing trace with hash -297131659, now seen corresponding path program 289 times [2022-03-01 17:35:04,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:04,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984837624] [2022-03-01 17:35:04,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:04,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:04,136 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:04,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984837624] [2022-03-01 17:35:04,136 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984837624] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:04,136 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429357155] [2022-03-01 17:35:04,136 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:04,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:04,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:04,137 INFO L229 MonitoredProcess]: Starting monitored process 294 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:04,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Waiting until timeout for monitored process [2022-03-01 17:35:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:04,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:04,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:04,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:04,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:04,322 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:04,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:04,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:04,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:04,432 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:04,433 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:04,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:04,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:04,453 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429357155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:04,453 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:04,453 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:35:04,453 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344525456] [2022-03-01 17:35:04,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:04,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:04,453 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:04,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:04,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:04,454 INFO L87 Difference]: Start difference. First operand 891 states and 2643 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:04,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:04,676 INFO L93 Difference]: Finished difference Result 959 states and 2774 transitions. [2022-03-01 17:35:04,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:35:04,676 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:04,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:04,678 INFO L225 Difference]: With dead ends: 959 [2022-03-01 17:35:04,678 INFO L226 Difference]: Without dead ends: 959 [2022-03-01 17:35:04,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:35:04,678 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 41 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 473 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:04,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 26 Invalid, 629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 473 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-03-01 17:35:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2022-03-01 17:35:04,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 894. [2022-03-01 17:35:04,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 894 states, 893 states have (on average 2.9686450167973124) internal successors, (2651), 893 states have internal predecessors, (2651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:04,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 894 states to 894 states and 2651 transitions. [2022-03-01 17:35:04,687 INFO L78 Accepts]: Start accepts. Automaton has 894 states and 2651 transitions. Word has length 17 [2022-03-01 17:35:04,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:04,688 INFO L470 AbstractCegarLoop]: Abstraction has 894 states and 2651 transitions. [2022-03-01 17:35:04,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:04,688 INFO L276 IsEmpty]: Start isEmpty. Operand 894 states and 2651 transitions. [2022-03-01 17:35:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:04,689 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:04,689 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:04,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (294)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:04,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,294 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:04,889 INFO L402 AbstractCegarLoop]: === Iteration 304 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1255530435, now seen corresponding path program 290 times [2022-03-01 17:35:04,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:04,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691922586] [2022-03-01 17:35:04,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:04,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:04,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:04,993 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:04,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691922586] [2022-03-01 17:35:04,993 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691922586] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:04,993 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423635867] [2022-03-01 17:35:04,993 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:04,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:04,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:04,994 INFO L229 MonitoredProcess]: Starting monitored process 295 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:04,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Waiting until timeout for monitored process [2022-03-01 17:35:05,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:05,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:05,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:05,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:05,195 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:05,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:05,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:05,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:05,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:05,349 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:05,349 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:05,351 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:05,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:05,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423635867] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:05,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:05,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:35:05,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092912606] [2022-03-01 17:35:05,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:05,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:05,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:05,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:05,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:05,376 INFO L87 Difference]: Start difference. First operand 894 states and 2651 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:05,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:05,602 INFO L93 Difference]: Finished difference Result 946 states and 2754 transitions. [2022-03-01 17:35:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:35:05,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:05,604 INFO L225 Difference]: With dead ends: 946 [2022-03-01 17:35:05,604 INFO L226 Difference]: Without dead ends: 946 [2022-03-01 17:35:05,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:35:05,604 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 20 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 355 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:05,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 26 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 355 Invalid, 0 Unknown, 51 Unchecked, 0.2s Time] [2022-03-01 17:35:05,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2022-03-01 17:35:05,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 898. [2022-03-01 17:35:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.967670011148272) internal successors, (2662), 897 states have internal predecessors, (2662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:05,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 2662 transitions. [2022-03-01 17:35:05,617 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 2662 transitions. Word has length 17 [2022-03-01 17:35:05,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:05,618 INFO L470 AbstractCegarLoop]: Abstraction has 898 states and 2662 transitions. [2022-03-01 17:35:05,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:05,618 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 2662 transitions. [2022-03-01 17:35:05,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:05,619 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:05,619 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:05,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (295)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:05,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 295 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2022-03-01 17:35:05,842 INFO L402 AbstractCegarLoop]: === Iteration 305 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:05,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:05,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1084828005, now seen corresponding path program 291 times [2022-03-01 17:35:05,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:05,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168969830] [2022-03-01 17:35:05,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:05,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:05,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:05,953 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:05,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:05,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168969830] [2022-03-01 17:35:05,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168969830] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:05,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198096884] [2022-03-01 17:35:05,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:05,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:05,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:05,955 INFO L229 MonitoredProcess]: Starting monitored process 296 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:05,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Waiting until timeout for monitored process [2022-03-01 17:35:05,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:35:05,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:05,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:05,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:06,165 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:06,166 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:06,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:06,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:06,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:06,289 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:06,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:06,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:06,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198096884] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:06,310 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:06,310 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:35:06,310 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889473613] [2022-03-01 17:35:06,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:06,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:06,310 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:06,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:06,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:06,310 INFO L87 Difference]: Start difference. First operand 898 states and 2662 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:06,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:06,572 INFO L93 Difference]: Finished difference Result 968 states and 2792 transitions. [2022-03-01 17:35:06,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:35:06,572 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:06,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:06,573 INFO L225 Difference]: With dead ends: 968 [2022-03-01 17:35:06,573 INFO L226 Difference]: Without dead ends: 968 [2022-03-01 17:35:06,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:35:06,573 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 34 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 229 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:06,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 34 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 580 Invalid, 0 Unknown, 229 Unchecked, 0.2s Time] [2022-03-01 17:35:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-03-01 17:35:06,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 891. [2022-03-01 17:35:06,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.9696629213483146) internal successors, (2643), 890 states have internal predecessors, (2643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:06,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2643 transitions. [2022-03-01 17:35:06,583 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2643 transitions. Word has length 17 [2022-03-01 17:35:06,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:06,583 INFO L470 AbstractCegarLoop]: Abstraction has 891 states and 2643 transitions. [2022-03-01 17:35:06,583 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:06,583 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2643 transitions. [2022-03-01 17:35:06,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:06,584 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:06,584 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:06,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (296)] Ended with exit code 0 [2022-03-01 17:35:06,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2022-03-01 17:35:06,785 INFO L402 AbstractCegarLoop]: === Iteration 306 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:06,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:06,785 INFO L85 PathProgramCache]: Analyzing trace with hash 906074359, now seen corresponding path program 292 times [2022-03-01 17:35:06,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:06,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810107194] [2022-03-01 17:35:06,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:06,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:06,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:06,887 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:06,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810107194] [2022-03-01 17:35:06,887 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810107194] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:06,887 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128882846] [2022-03-01 17:35:06,887 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:06,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:06,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:06,888 INFO L229 MonitoredProcess]: Starting monitored process 297 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:06,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Waiting until timeout for monitored process [2022-03-01 17:35:06,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:06,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:06,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:06,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:07,087 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:07,088 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:07,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:07,091 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:35:07,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:07,094 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:35:07,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:07,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:07,216 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:07,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:07,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:07,237 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128882846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:07,237 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:07,237 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:35:07,237 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679186358] [2022-03-01 17:35:07,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:07,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:07,237 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:07,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:07,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:07,237 INFO L87 Difference]: Start difference. First operand 891 states and 2643 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:07,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:07,576 INFO L93 Difference]: Finished difference Result 1037 states and 2940 transitions. [2022-03-01 17:35:07,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:35:07,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:07,577 INFO L225 Difference]: With dead ends: 1037 [2022-03-01 17:35:07,577 INFO L226 Difference]: Without dead ends: 1037 [2022-03-01 17:35:07,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:07,578 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:07,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 216 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:35:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2022-03-01 17:35:07,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 944. [2022-03-01 17:35:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 943 states have (on average 2.9766702014846236) internal successors, (2807), 943 states have internal predecessors, (2807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 2807 transitions. [2022-03-01 17:35:07,588 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 2807 transitions. Word has length 17 [2022-03-01 17:35:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:07,588 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 2807 transitions. [2022-03-01 17:35:07,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 2807 transitions. [2022-03-01 17:35:07,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:07,589 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:07,589 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:07,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (297)] Ended with exit code 0 [2022-03-01 17:35:07,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2022-03-01 17:35:07,790 INFO L402 AbstractCegarLoop]: === Iteration 307 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:07,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:07,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1836956947, now seen corresponding path program 293 times [2022-03-01 17:35:07,790 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:07,790 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637198122] [2022-03-01 17:35:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:07,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:07,898 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:07,898 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:07,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637198122] [2022-03-01 17:35:07,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637198122] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:07,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352322675] [2022-03-01 17:35:07,898 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:07,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:07,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:07,899 INFO L229 MonitoredProcess]: Starting monitored process 298 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:07,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Waiting until timeout for monitored process [2022-03-01 17:35:07,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:35:07,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:07,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:07,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:08,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:08,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:35:08,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:08,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:35:08,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:08,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:08,223 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:08,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:08,225 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:08,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1352322675] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:08,248 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:08,248 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:35:08,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279070421] [2022-03-01 17:35:08,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:08,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:08,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:08,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:08,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:08,249 INFO L87 Difference]: Start difference. First operand 944 states and 2807 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:08,669 INFO L93 Difference]: Finished difference Result 1021 states and 2900 transitions. [2022-03-01 17:35:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:35:08,670 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:08,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:08,671 INFO L225 Difference]: With dead ends: 1021 [2022-03-01 17:35:08,671 INFO L226 Difference]: Without dead ends: 1013 [2022-03-01 17:35:08,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:35:08,672 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:08,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 122 Invalid, 644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:35:08,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-01 17:35:08,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 950. [2022-03-01 17:35:08,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.964172813487882) internal successors, (2813), 949 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:08,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2813 transitions. [2022-03-01 17:35:08,682 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2813 transitions. Word has length 17 [2022-03-01 17:35:08,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:08,682 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 2813 transitions. [2022-03-01 17:35:08,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:08,682 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2813 transitions. [2022-03-01 17:35:08,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:08,683 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:08,683 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:08,699 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (298)] Ended with exit code 0 [2022-03-01 17:35:08,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,298 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:08,884 INFO L402 AbstractCegarLoop]: === Iteration 308 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:08,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:08,884 INFO L85 PathProgramCache]: Analyzing trace with hash -254947755, now seen corresponding path program 294 times [2022-03-01 17:35:08,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:08,884 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613525257] [2022-03-01 17:35:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:08,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:08,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:08,989 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:08,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613525257] [2022-03-01 17:35:08,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613525257] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:08,989 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570101860] [2022-03-01 17:35:08,989 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:08,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:08,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:08,991 INFO L229 MonitoredProcess]: Starting monitored process 299 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:08,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Waiting until timeout for monitored process [2022-03-01 17:35:09,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:35:09,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:09,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:09,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:09,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:09,208 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:09,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:09,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:35:09,213 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:09,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:35:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:09,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:09,354 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:09,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:09,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:09,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:09,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570101860] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:09,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:09,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:35:09,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500911116] [2022-03-01 17:35:09,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:09,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:35:09,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:09,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:35:09,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:35:09,375 INFO L87 Difference]: Start difference. First operand 950 states and 2813 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:10,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:10,783 INFO L93 Difference]: Finished difference Result 1142 states and 3132 transitions. [2022-03-01 17:35:10,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:35:10,784 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:10,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:10,785 INFO L225 Difference]: With dead ends: 1142 [2022-03-01 17:35:10,785 INFO L226 Difference]: Without dead ends: 1139 [2022-03-01 17:35:10,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=436, Invalid=2644, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:35:10,785 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 138 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:10,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 180 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:35:10,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2022-03-01 17:35:10,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 947. [2022-03-01 17:35:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 947 states, 946 states have (on average 2.970401691331924) internal successors, (2810), 946 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 947 states to 947 states and 2810 transitions. [2022-03-01 17:35:10,796 INFO L78 Accepts]: Start accepts. Automaton has 947 states and 2810 transitions. Word has length 17 [2022-03-01 17:35:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:10,796 INFO L470 AbstractCegarLoop]: Abstraction has 947 states and 2810 transitions. [2022-03-01 17:35:10,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 947 states and 2810 transitions. [2022-03-01 17:35:10,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:10,797 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:10,797 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:10,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (299)] Ended with exit code 0 [2022-03-01 17:35:10,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,299 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:10,998 INFO L402 AbstractCegarLoop]: === Iteration 309 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:10,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:10,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1299101369, now seen corresponding path program 295 times [2022-03-01 17:35:10,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:10,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878381278] [2022-03-01 17:35:10,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:10,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:11,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:11,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:11,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878381278] [2022-03-01 17:35:11,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878381278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:11,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131482535] [2022-03-01 17:35:11,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:11,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:11,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:11,104 INFO L229 MonitoredProcess]: Starting monitored process 300 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:11,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Waiting until timeout for monitored process [2022-03-01 17:35:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:11,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:11,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:11,317 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:11,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:35:11,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:11,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:35:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:11,359 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:11,457 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:11,458 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:11,460 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:11,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131482535] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:11,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:11,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:35:11,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146749792] [2022-03-01 17:35:11,484 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:11,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:35:11,484 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:11,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:35:11,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:35:11,485 INFO L87 Difference]: Start difference. First operand 947 states and 2810 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:12,190 INFO L93 Difference]: Finished difference Result 1035 states and 2920 transitions. [2022-03-01 17:35:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:35:12,190 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:12,192 INFO L225 Difference]: With dead ends: 1035 [2022-03-01 17:35:12,192 INFO L226 Difference]: Without dead ends: 1026 [2022-03-01 17:35:12,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=1370, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:35:12,192 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 78 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:12,192 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 188 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:35:12,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2022-03-01 17:35:12,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 950. [2022-03-01 17:35:12,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 950 states, 949 states have (on average 2.964172813487882) internal successors, (2813), 949 states have internal predecessors, (2813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:12,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 950 states to 950 states and 2813 transitions. [2022-03-01 17:35:12,202 INFO L78 Accepts]: Start accepts. Automaton has 950 states and 2813 transitions. Word has length 17 [2022-03-01 17:35:12,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:12,202 INFO L470 AbstractCegarLoop]: Abstraction has 950 states and 2813 transitions. [2022-03-01 17:35:12,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:12,202 INFO L276 IsEmpty]: Start isEmpty. Operand 950 states and 2813 transitions. [2022-03-01 17:35:12,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:12,203 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:12,203 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:12,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (300)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:12,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,300 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:12,404 INFO L402 AbstractCegarLoop]: === Iteration 310 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:12,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:12,404 INFO L85 PathProgramCache]: Analyzing trace with hash -15305417, now seen corresponding path program 296 times [2022-03-01 17:35:12,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:12,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476037259] [2022-03-01 17:35:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:12,512 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:12,512 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:12,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476037259] [2022-03-01 17:35:12,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476037259] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:12,512 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190510206] [2022-03-01 17:35:12,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:12,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:12,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:12,514 INFO L229 MonitoredProcess]: Starting monitored process 301 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:12,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Waiting until timeout for monitored process [2022-03-01 17:35:12,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:12,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:12,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:12,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:12,732 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:12,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:12,743 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:12,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:35:12,746 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:12,747 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:35:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:12,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:12,902 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:12,902 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:12,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:12,923 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:12,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190510206] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:12,923 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:12,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:35:12,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044295923] [2022-03-01 17:35:12,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:12,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:35:12,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:35:12,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:12,924 INFO L87 Difference]: Start difference. First operand 950 states and 2813 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:14,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:14,153 INFO L93 Difference]: Finished difference Result 1140 states and 3144 transitions. [2022-03-01 17:35:14,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:35:14,153 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:14,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:14,155 INFO L225 Difference]: With dead ends: 1140 [2022-03-01 17:35:14,155 INFO L226 Difference]: Without dead ends: 1140 [2022-03-01 17:35:14,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:35:14,155 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 148 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:14,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 104 Invalid, 764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:35:14,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1140 states. [2022-03-01 17:35:14,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1140 to 958. [2022-03-01 17:35:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.9759665621734586) internal successors, (2848), 957 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:14,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2848 transitions. [2022-03-01 17:35:14,166 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2848 transitions. Word has length 17 [2022-03-01 17:35:14,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:14,166 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 2848 transitions. [2022-03-01 17:35:14,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:14,166 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2848 transitions. [2022-03-01 17:35:14,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:14,167 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:14,167 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:14,183 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (301)] Ended with exit code 0 [2022-03-01 17:35:14,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,301 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:14,368 INFO L402 AbstractCegarLoop]: === Iteration 311 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash -935006125, now seen corresponding path program 297 times [2022-03-01 17:35:14,368 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:14,368 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847951957] [2022-03-01 17:35:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:14,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:14,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:14,475 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:14,475 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:14,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847951957] [2022-03-01 17:35:14,475 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847951957] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:14,475 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033093176] [2022-03-01 17:35:14,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:14,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:14,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:14,476 INFO L229 MonitoredProcess]: Starting monitored process 302 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:14,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Waiting until timeout for monitored process [2022-03-01 17:35:14,501 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:35:14,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:14,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:14,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:14,700 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:14,700 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:35:14,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:14,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:35:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:14,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:14,857 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:14,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:14,859 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:14,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:14,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033093176] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:14,883 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:14,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:35:14,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796109908] [2022-03-01 17:35:14,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:14,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:35:14,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:14,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:35:14,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:14,883 INFO L87 Difference]: Start difference. First operand 958 states and 2848 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:15,501 INFO L93 Difference]: Finished difference Result 1019 states and 2928 transitions. [2022-03-01 17:35:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:35:15,501 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:15,502 INFO L225 Difference]: With dead ends: 1019 [2022-03-01 17:35:15,502 INFO L226 Difference]: Without dead ends: 1013 [2022-03-01 17:35:15,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=1222, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:35:15,503 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 76 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:15,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 108 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:35:15,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2022-03-01 17:35:15,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 959. [2022-03-01 17:35:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.9728601252609606) internal successors, (2848), 958 states have internal predecessors, (2848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:15,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2848 transitions. [2022-03-01 17:35:15,513 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2848 transitions. Word has length 17 [2022-03-01 17:35:15,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:15,513 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2848 transitions. [2022-03-01 17:35:15,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:15,513 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2848 transitions. [2022-03-01 17:35:15,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:15,514 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:15,514 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:15,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (302)] Ended with exit code 0 [2022-03-01 17:35:15,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2022-03-01 17:35:15,715 INFO L402 AbstractCegarLoop]: === Iteration 312 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:15,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:15,715 INFO L85 PathProgramCache]: Analyzing trace with hash -7575019, now seen corresponding path program 298 times [2022-03-01 17:35:15,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:15,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273462186] [2022-03-01 17:35:15,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:15,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:15,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:15,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:15,826 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:15,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273462186] [2022-03-01 17:35:15,826 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273462186] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:15,826 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246337936] [2022-03-01 17:35:15,826 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:15,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:15,826 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:15,827 INFO L229 MonitoredProcess]: Starting monitored process 303 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:15,827 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Waiting until timeout for monitored process [2022-03-01 17:35:15,852 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:15,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:15,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:15,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:16,013 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:16,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:16,015 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:16,015 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:16,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:16,090 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:16,225 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:16,231 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:16,233 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:16,252 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:16,252 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246337936] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:16,252 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:16,252 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:35:16,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588847874] [2022-03-01 17:35:16,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:16,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:35:16,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:16,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:35:16,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:35:16,252 INFO L87 Difference]: Start difference. First operand 959 states and 2848 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:17,331 INFO L93 Difference]: Finished difference Result 1138 states and 3093 transitions. [2022-03-01 17:35:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:35:17,331 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:17,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:17,333 INFO L225 Difference]: With dead ends: 1138 [2022-03-01 17:35:17,333 INFO L226 Difference]: Without dead ends: 1138 [2022-03-01 17:35:17,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:35:17,333 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 245 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:17,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 150 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:35:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1138 states. [2022-03-01 17:35:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1138 to 941. [2022-03-01 17:35:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 2.9638297872340424) internal successors, (2786), 940 states have internal predecessors, (2786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2786 transitions. [2022-03-01 17:35:17,344 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2786 transitions. Word has length 17 [2022-03-01 17:35:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:17,344 INFO L470 AbstractCegarLoop]: Abstraction has 941 states and 2786 transitions. [2022-03-01 17:35:17,344 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:17,345 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2786 transitions. [2022-03-01 17:35:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:17,346 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:17,346 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:17,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (303)] Ended with exit code 0 [2022-03-01 17:35:17,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 303 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2022-03-01 17:35:17,546 INFO L402 AbstractCegarLoop]: === Iteration 313 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:17,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:17,546 INFO L85 PathProgramCache]: Analyzing trace with hash 794041209, now seen corresponding path program 299 times [2022-03-01 17:35:17,546 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:17,546 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705945108] [2022-03-01 17:35:17,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:17,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:17,660 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:17,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705945108] [2022-03-01 17:35:17,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705945108] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:17,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697174648] [2022-03-01 17:35:17,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:17,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:17,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:17,661 INFO L229 MonitoredProcess]: Starting monitored process 304 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:17,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Waiting until timeout for monitored process [2022-03-01 17:35:17,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:35:17,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:17,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:17,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:17,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:17,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:17,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:17,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:17,930 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:17,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:18,040 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:18,041 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:18,043 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:18,066 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:18,066 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697174648] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:18,066 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:18,066 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:35:18,066 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132230871] [2022-03-01 17:35:18,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:18,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:35:18,066 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:18,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:35:18,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:18,067 INFO L87 Difference]: Start difference. First operand 941 states and 2786 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:18,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:18,647 INFO L93 Difference]: Finished difference Result 1028 states and 2923 transitions. [2022-03-01 17:35:18,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:35:18,648 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:18,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:18,649 INFO L225 Difference]: With dead ends: 1028 [2022-03-01 17:35:18,649 INFO L226 Difference]: Without dead ends: 1023 [2022-03-01 17:35:18,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:35:18,649 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 124 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:18,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 98 Invalid, 722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:35:18,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1023 states. [2022-03-01 17:35:18,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1023 to 948. [2022-03-01 17:35:18,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 948 states, 947 states have (on average 2.9651531151003168) internal successors, (2808), 947 states have internal predecessors, (2808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:18,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 2808 transitions. [2022-03-01 17:35:18,660 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 2808 transitions. Word has length 17 [2022-03-01 17:35:18,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:18,660 INFO L470 AbstractCegarLoop]: Abstraction has 948 states and 2808 transitions. [2022-03-01 17:35:18,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:18,660 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 2808 transitions. [2022-03-01 17:35:18,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:18,661 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:18,661 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:18,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (304)] Ended with exit code 0 [2022-03-01 17:35:18,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2022-03-01 17:35:18,861 INFO L402 AbstractCegarLoop]: === Iteration 314 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:18,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:18,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1782582381, now seen corresponding path program 300 times [2022-03-01 17:35:18,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:18,862 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211328788] [2022-03-01 17:35:18,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:18,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:18,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:18,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:18,972 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:18,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211328788] [2022-03-01 17:35:18,972 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211328788] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:18,972 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443902891] [2022-03-01 17:35:18,972 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:18,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:18,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:18,973 INFO L229 MonitoredProcess]: Starting monitored process 305 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:18,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Waiting until timeout for monitored process [2022-03-01 17:35:18,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:35:18,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:18,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:18,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:19,159 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:19,160 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:19,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:19,162 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:19,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:19,344 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:19,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:19,346 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:19,369 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:19,369 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443902891] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:19,369 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:19,369 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:35:19,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791325998] [2022-03-01 17:35:19,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:19,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:35:19,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:19,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:35:19,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:19,370 INFO L87 Difference]: Start difference. First operand 948 states and 2808 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:19,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:19,750 INFO L93 Difference]: Finished difference Result 1017 states and 2911 transitions. [2022-03-01 17:35:19,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:35:19,751 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:19,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:19,752 INFO L225 Difference]: With dead ends: 1017 [2022-03-01 17:35:19,752 INFO L226 Difference]: Without dead ends: 1017 [2022-03-01 17:35:19,752 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:35:19,752 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 69 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:19,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 100 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 528 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:35:19,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2022-03-01 17:35:19,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 933. [2022-03-01 17:35:19,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 933 states, 932 states have (on average 2.959227467811159) internal successors, (2758), 932 states have internal predecessors, (2758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:19,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 933 states to 933 states and 2758 transitions. [2022-03-01 17:35:19,762 INFO L78 Accepts]: Start accepts. Automaton has 933 states and 2758 transitions. Word has length 17 [2022-03-01 17:35:19,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:19,763 INFO L470 AbstractCegarLoop]: Abstraction has 933 states and 2758 transitions. [2022-03-01 17:35:19,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:19,763 INFO L276 IsEmpty]: Start isEmpty. Operand 933 states and 2758 transitions. [2022-03-01 17:35:19,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:19,764 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:19,764 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:19,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (305)] Ended with exit code 0 [2022-03-01 17:35:19,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2022-03-01 17:35:19,964 INFO L402 AbstractCegarLoop]: === Iteration 315 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:19,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:19,964 INFO L85 PathProgramCache]: Analyzing trace with hash 505854579, now seen corresponding path program 301 times [2022-03-01 17:35:19,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:19,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005420321] [2022-03-01 17:35:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:19,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:20,060 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:20,061 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:20,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005420321] [2022-03-01 17:35:20,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005420321] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:20,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929966580] [2022-03-01 17:35:20,061 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:20,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:20,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:20,062 INFO L229 MonitoredProcess]: Starting monitored process 306 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:20,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Waiting until timeout for monitored process [2022-03-01 17:35:20,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:20,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:20,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:20,227 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:20,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:20,229 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:20,229 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:20,308 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:20,400 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:20,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:20,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:20,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929966580] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:20,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:20,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:35:20,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051921477] [2022-03-01 17:35:20,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:20,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:20,424 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:20,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:20,424 INFO L87 Difference]: Start difference. First operand 933 states and 2758 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:21,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:21,183 INFO L93 Difference]: Finished difference Result 989 states and 2866 transitions. [2022-03-01 17:35:21,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:35:21,183 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:21,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:21,185 INFO L225 Difference]: With dead ends: 989 [2022-03-01 17:35:21,185 INFO L226 Difference]: Without dead ends: 985 [2022-03-01 17:35:21,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=211, Invalid=1349, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:35:21,185 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:21,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 58 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:35:21,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2022-03-01 17:35:21,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 936. [2022-03-01 17:35:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 935 states have (on average 2.9572192513368982) internal successors, (2765), 935 states have internal predecessors, (2765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 2765 transitions. [2022-03-01 17:35:21,195 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 2765 transitions. Word has length 17 [2022-03-01 17:35:21,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:21,195 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 2765 transitions. [2022-03-01 17:35:21,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:21,195 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 2765 transitions. [2022-03-01 17:35:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:21,196 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:21,196 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:21,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (306)] Ended with exit code 0 [2022-03-01 17:35:21,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 306 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2022-03-01 17:35:21,397 INFO L402 AbstractCegarLoop]: === Iteration 316 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:21,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:21,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1517986223, now seen corresponding path program 302 times [2022-03-01 17:35:21,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:21,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834742707] [2022-03-01 17:35:21,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:21,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:21,479 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:21,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834742707] [2022-03-01 17:35:21,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834742707] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:21,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165727913] [2022-03-01 17:35:21,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:21,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:21,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:21,480 INFO L229 MonitoredProcess]: Starting monitored process 307 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:21,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Waiting until timeout for monitored process [2022-03-01 17:35:21,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:21,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:21,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:21,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:21,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:21,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:21,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:21,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:21,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:21,779 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:35:21,779 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:35:21,781 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:21,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165727913] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:21,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:21,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 19 [2022-03-01 17:35:21,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530238776] [2022-03-01 17:35:21,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:21,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:21,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:21,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:21,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:21,811 INFO L87 Difference]: Start difference. First operand 936 states and 2765 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:22,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:22,143 INFO L93 Difference]: Finished difference Result 1066 states and 3002 transitions. [2022-03-01 17:35:22,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:35:22,143 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:22,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:22,145 INFO L225 Difference]: With dead ends: 1066 [2022-03-01 17:35:22,145 INFO L226 Difference]: Without dead ends: 1066 [2022-03-01 17:35:22,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:35:22,145 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 84 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:22,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 108 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:35:22,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2022-03-01 17:35:22,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 957. [2022-03-01 17:35:22,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.969665271966527) internal successors, (2839), 956 states have internal predecessors, (2839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:22,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2839 transitions. [2022-03-01 17:35:22,155 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2839 transitions. Word has length 17 [2022-03-01 17:35:22,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:22,156 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 2839 transitions. [2022-03-01 17:35:22,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:22,156 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2839 transitions. [2022-03-01 17:35:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:22,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:22,157 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:22,172 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (307)] Ended with exit code 0 [2022-03-01 17:35:22,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2022-03-01 17:35:22,357 INFO L402 AbstractCegarLoop]: === Iteration 317 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:22,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:22,357 INFO L85 PathProgramCache]: Analyzing trace with hash -716369995, now seen corresponding path program 303 times [2022-03-01 17:35:22,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:22,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916621570] [2022-03-01 17:35:22,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:22,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:22,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:22,457 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:22,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916621570] [2022-03-01 17:35:22,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916621570] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:22,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725558321] [2022-03-01 17:35:22,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:22,457 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:22,457 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:22,458 INFO L229 MonitoredProcess]: Starting monitored process 308 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:22,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Waiting until timeout for monitored process [2022-03-01 17:35:22,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:35:22,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:22,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:22,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:22,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:22,606 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:22,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:22,608 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:22,681 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:22,751 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:35:22,751 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:35:22,753 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:35:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:22,777 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725558321] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:22,777 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:22,777 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:35:22,777 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157157556] [2022-03-01 17:35:22,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:22,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:35:22,777 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:22,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:35:22,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:35:22,778 INFO L87 Difference]: Start difference. First operand 957 states and 2839 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:23,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:23,318 INFO L93 Difference]: Finished difference Result 1098 states and 3072 transitions. [2022-03-01 17:35:23,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:35:23,318 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:23,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:23,320 INFO L225 Difference]: With dead ends: 1098 [2022-03-01 17:35:23,320 INFO L226 Difference]: Without dead ends: 1092 [2022-03-01 17:35:23,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=899, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:35:23,320 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 80 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:23,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 126 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 759 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:35:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2022-03-01 17:35:23,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 966. [2022-03-01 17:35:23,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.972020725388601) internal successors, (2868), 965 states have internal predecessors, (2868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 2868 transitions. [2022-03-01 17:35:23,338 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 2868 transitions. Word has length 17 [2022-03-01 17:35:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:23,338 INFO L470 AbstractCegarLoop]: Abstraction has 966 states and 2868 transitions. [2022-03-01 17:35:23,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 2868 transitions. [2022-03-01 17:35:23,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:23,340 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:23,340 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:23,355 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (308)] Ended with exit code 0 [2022-03-01 17:35:23,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2022-03-01 17:35:23,540 INFO L402 AbstractCegarLoop]: === Iteration 318 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:23,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:23,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1001973711, now seen corresponding path program 304 times [2022-03-01 17:35:23,541 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:23,541 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35821672] [2022-03-01 17:35:23,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:23,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:23,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:23,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35821672] [2022-03-01 17:35:23,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [35821672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:23,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2846185] [2022-03-01 17:35:23,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:23,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:23,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:23,618 INFO L229 MonitoredProcess]: Starting monitored process 309 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:23,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Waiting until timeout for monitored process [2022-03-01 17:35:23,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:23,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:23,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:23,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:23,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:23,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:23,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:23,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:23,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:23,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:23,895 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:35:23,895 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:35:23,897 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:35:23,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:23,921 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2846185] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:23,921 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:23,921 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:35:23,921 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663667964] [2022-03-01 17:35:23,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:23,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:35:23,921 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:23,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:35:23,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:35:23,921 INFO L87 Difference]: Start difference. First operand 966 states and 2868 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:24,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:24,253 INFO L93 Difference]: Finished difference Result 1077 states and 3046 transitions. [2022-03-01 17:35:24,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:35:24,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:24,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:24,255 INFO L225 Difference]: With dead ends: 1077 [2022-03-01 17:35:24,255 INFO L226 Difference]: Without dead ends: 1077 [2022-03-01 17:35:24,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:35:24,256 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:24,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 108 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:35:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-03-01 17:35:24,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 959. [2022-03-01 17:35:24,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.964509394572025) internal successors, (2840), 958 states have internal predecessors, (2840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:24,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2840 transitions. [2022-03-01 17:35:24,266 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2840 transitions. Word has length 17 [2022-03-01 17:35:24,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:24,266 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2840 transitions. [2022-03-01 17:35:24,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:24,266 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2840 transitions. [2022-03-01 17:35:24,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:24,267 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:24,267 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:24,283 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (309)] Ended with exit code 0 [2022-03-01 17:35:24,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,309 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:24,468 INFO L402 AbstractCegarLoop]: === Iteration 319 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:24,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:24,468 INFO L85 PathProgramCache]: Analyzing trace with hash -708639597, now seen corresponding path program 305 times [2022-03-01 17:35:24,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:24,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460762166] [2022-03-01 17:35:24,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:24,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:24,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:24,545 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:24,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460762166] [2022-03-01 17:35:24,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1460762166] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:24,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250415931] [2022-03-01 17:35:24,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:24,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:24,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:24,546 INFO L229 MonitoredProcess]: Starting monitored process 310 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:24,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Waiting until timeout for monitored process [2022-03-01 17:35:24,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:35:24,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:24,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:24,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:24,716 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:24,716 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:24,718 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:24,719 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:24,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:24,822 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:35:24,823 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:35:24,824 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:35:24,848 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:24,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250415931] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:24,848 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:24,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:35:24,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919780289] [2022-03-01 17:35:24,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:24,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:35:24,848 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:24,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:35:24,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:35:24,849 INFO L87 Difference]: Start difference. First operand 959 states and 2840 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:25,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:25,112 INFO L93 Difference]: Finished difference Result 1052 states and 2996 transitions. [2022-03-01 17:35:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:35:25,112 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:25,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:25,114 INFO L225 Difference]: With dead ends: 1052 [2022-03-01 17:35:25,114 INFO L226 Difference]: Without dead ends: 1052 [2022-03-01 17:35:25,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:25,114 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 52 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:25,114 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 142 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 610 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-03-01 17:35:25,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-03-01 17:35:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 958. [2022-03-01 17:35:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 2.963427377220481) internal successors, (2836), 957 states have internal predecessors, (2836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:25,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 2836 transitions. [2022-03-01 17:35:25,125 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 2836 transitions. Word has length 17 [2022-03-01 17:35:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:25,125 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 2836 transitions. [2022-03-01 17:35:25,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 2836 transitions. [2022-03-01 17:35:25,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:25,126 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:25,126 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:25,141 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (310)] Ended with exit code 0 [2022-03-01 17:35:25,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,310 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:25,326 INFO L402 AbstractCegarLoop]: === Iteration 320 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:25,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:25,327 INFO L85 PathProgramCache]: Analyzing trace with hash -561657485, now seen corresponding path program 306 times [2022-03-01 17:35:25,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:25,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721931482] [2022-03-01 17:35:25,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:25,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:25,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:25,412 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:25,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721931482] [2022-03-01 17:35:25,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721931482] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:25,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152671813] [2022-03-01 17:35:25,412 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:25,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:25,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:25,413 INFO L229 MonitoredProcess]: Starting monitored process 311 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:25,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Waiting until timeout for monitored process [2022-03-01 17:35:25,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:35:25,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:25,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:25,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:25,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:25,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:25,559 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:25,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:25,637 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:25,701 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:35:25,702 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:35:25,703 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:25,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152671813] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:25,733 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:25,733 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:35:25,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072309158] [2022-03-01 17:35:25,733 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:25,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:35:25,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:25,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:35:25,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:35:25,733 INFO L87 Difference]: Start difference. First operand 958 states and 2836 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:26,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:26,136 INFO L93 Difference]: Finished difference Result 995 states and 2892 transitions. [2022-03-01 17:35:26,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:35:26,136 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:26,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:26,138 INFO L225 Difference]: With dead ends: 995 [2022-03-01 17:35:26,138 INFO L226 Difference]: Without dead ends: 991 [2022-03-01 17:35:26,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=119, Invalid=693, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:35:26,138 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 72 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:26,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 26 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:35:26,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2022-03-01 17:35:26,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 957. [2022-03-01 17:35:26,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 956 states have (on average 2.957112970711297) internal successors, (2827), 956 states have internal predecessors, (2827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:26,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 2827 transitions. [2022-03-01 17:35:26,148 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 2827 transitions. Word has length 17 [2022-03-01 17:35:26,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:26,148 INFO L470 AbstractCegarLoop]: Abstraction has 957 states and 2827 transitions. [2022-03-01 17:35:26,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:26,148 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 2827 transitions. [2022-03-01 17:35:26,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:26,149 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:26,149 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:26,165 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (311)] Ended with exit code 0 [2022-03-01 17:35:26,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,311 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:26,350 INFO L402 AbstractCegarLoop]: === Iteration 321 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:26,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash 1167389849, now seen corresponding path program 307 times [2022-03-01 17:35:26,350 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:26,350 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701674385] [2022-03-01 17:35:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:26,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:26,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:26,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:26,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701674385] [2022-03-01 17:35:26,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701674385] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:26,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699496512] [2022-03-01 17:35:26,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:26,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:26,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:26,427 INFO L229 MonitoredProcess]: Starting monitored process 312 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:26,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Waiting until timeout for monitored process [2022-03-01 17:35:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:26,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:26,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:26,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:35:26,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:26,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:35:26,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:26,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:26,729 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:35:26,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:35:26,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:26,759 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699496512] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:26,759 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:26,759 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:35:26,759 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632077932] [2022-03-01 17:35:26,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:26,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:35:26,759 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:26,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:35:26,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:35:26,760 INFO L87 Difference]: Start difference. First operand 957 states and 2827 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:27,006 INFO L93 Difference]: Finished difference Result 970 states and 2847 transitions. [2022-03-01 17:35:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:35:27,006 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:27,008 INFO L225 Difference]: With dead ends: 970 [2022-03-01 17:35:27,008 INFO L226 Difference]: Without dead ends: 964 [2022-03-01 17:35:27,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-03-01 17:35:27,008 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:27,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 353 Invalid, 0 Unknown, 53 Unchecked, 0.1s Time] [2022-03-01 17:35:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 964 states. [2022-03-01 17:35:27,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 964 to 959. [2022-03-01 17:35:27,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 2.9551148225469728) internal successors, (2831), 958 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:27,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 2831 transitions. [2022-03-01 17:35:27,018 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 2831 transitions. Word has length 17 [2022-03-01 17:35:27,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:27,018 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 2831 transitions. [2022-03-01 17:35:27,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:27,018 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 2831 transitions. [2022-03-01 17:35:27,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:27,019 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:27,019 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:27,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (312)] Ended with exit code 0 [2022-03-01 17:35:27,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2022-03-01 17:35:27,220 INFO L402 AbstractCegarLoop]: === Iteration 322 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:27,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:27,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1096093291, now seen corresponding path program 308 times [2022-03-01 17:35:27,220 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:27,220 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469812706] [2022-03-01 17:35:27,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:27,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:27,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:27,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469812706] [2022-03-01 17:35:27,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469812706] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:27,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518403230] [2022-03-01 17:35:27,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:27,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:27,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:27,316 INFO L229 MonitoredProcess]: Starting monitored process 313 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:27,316 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Waiting until timeout for monitored process [2022-03-01 17:35:27,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:27,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:27,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:27,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:27,486 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:27,486 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:27,488 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:27,488 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:27,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:27,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:27,652 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:27,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:27,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:27,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518403230] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:27,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:27,681 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:35:27,681 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365799414] [2022-03-01 17:35:27,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:27,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:27,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:27,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:27,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:27,682 INFO L87 Difference]: Start difference. First operand 959 states and 2831 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:28,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:28,092 INFO L93 Difference]: Finished difference Result 1130 states and 3146 transitions. [2022-03-01 17:35:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:35:28,092 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:28,093 INFO L225 Difference]: With dead ends: 1130 [2022-03-01 17:35:28,094 INFO L226 Difference]: Without dead ends: 1130 [2022-03-01 17:35:28,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:35:28,094 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 105 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:28,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 124 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:35:28,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1130 states. [2022-03-01 17:35:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1130 to 981. [2022-03-01 17:35:28,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 981 states, 980 states have (on average 2.970408163265306) internal successors, (2911), 980 states have internal predecessors, (2911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:28,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 2911 transitions. [2022-03-01 17:35:28,105 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 2911 transitions. Word has length 17 [2022-03-01 17:35:28,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:28,105 INFO L470 AbstractCegarLoop]: Abstraction has 981 states and 2911 transitions. [2022-03-01 17:35:28,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 2911 transitions. [2022-03-01 17:35:28,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:28,106 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:28,106 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:28,122 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (313)] Ended with exit code 0 [2022-03-01 17:35:28,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable321,313 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:28,306 INFO L402 AbstractCegarLoop]: === Iteration 323 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:28,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:28,307 INFO L85 PathProgramCache]: Analyzing trace with hash -294477063, now seen corresponding path program 309 times [2022-03-01 17:35:28,307 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:28,307 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900690200] [2022-03-01 17:35:28,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:28,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:28,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:28,393 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:28,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900690200] [2022-03-01 17:35:28,393 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900690200] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:28,393 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474995160] [2022-03-01 17:35:28,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:28,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:28,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:28,394 INFO L229 MonitoredProcess]: Starting monitored process 314 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:28,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Waiting until timeout for monitored process [2022-03-01 17:35:28,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:35:28,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:28,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:28,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:28,558 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:28,559 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:28,560 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:28,561 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:28,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:28,729 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:28,729 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:28,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:28,752 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474995160] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:28,753 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:28,753 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:35:28,753 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638684630] [2022-03-01 17:35:28,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:28,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:28,753 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:28,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:28,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:28,753 INFO L87 Difference]: Start difference. First operand 981 states and 2911 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:29,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:29,846 INFO L93 Difference]: Finished difference Result 1233 states and 3397 transitions. [2022-03-01 17:35:29,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:35:29,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:29,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:29,849 INFO L225 Difference]: With dead ends: 1233 [2022-03-01 17:35:29,849 INFO L226 Difference]: Without dead ends: 1224 [2022-03-01 17:35:29,849 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=334, Invalid=2116, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:35:29,849 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 142 mSDsluCounter, 364 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:29,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 148 Invalid, 1026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:35:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2022-03-01 17:35:29,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1012. [2022-03-01 17:35:29,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.986152324431256) internal successors, (3019), 1011 states have internal predecessors, (3019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:29,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 3019 transitions. [2022-03-01 17:35:29,861 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 3019 transitions. Word has length 17 [2022-03-01 17:35:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:29,861 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 3019 transitions. [2022-03-01 17:35:29,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 3019 transitions. [2022-03-01 17:35:29,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:29,862 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:29,862 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:29,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (314)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:30,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2022-03-01 17:35:30,063 INFO L402 AbstractCegarLoop]: === Iteration 324 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:30,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:30,064 INFO L85 PathProgramCache]: Analyzing trace with hash 1423866643, now seen corresponding path program 310 times [2022-03-01 17:35:30,064 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:30,064 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337896828] [2022-03-01 17:35:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:30,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:30,151 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:30,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337896828] [2022-03-01 17:35:30,151 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337896828] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:30,151 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791559473] [2022-03-01 17:35:30,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:30,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:30,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:30,154 INFO L229 MonitoredProcess]: Starting monitored process 315 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:30,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Waiting until timeout for monitored process [2022-03-01 17:35:30,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:30,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:30,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:30,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:30,324 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:30,324 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:30,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:30,326 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:30,386 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:30,386 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:30,478 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:30,478 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:30,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:30,501 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:30,501 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791559473] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:30,502 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:30,502 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:35:30,502 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700346501] [2022-03-01 17:35:30,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:30,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:30,502 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:30,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:30,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:30,502 INFO L87 Difference]: Start difference. First operand 1012 states and 3019 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:31,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:31,207 INFO L93 Difference]: Finished difference Result 1220 states and 3376 transitions. [2022-03-01 17:35:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:35:31,208 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:31,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:31,209 INFO L225 Difference]: With dead ends: 1220 [2022-03-01 17:35:31,209 INFO L226 Difference]: Without dead ends: 1220 [2022-03-01 17:35:31,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:35:31,210 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:31,210 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 134 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:35:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-03-01 17:35:31,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 995. [2022-03-01 17:35:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 2.9678068410462775) internal successors, (2950), 994 states have internal predecessors, (2950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 2950 transitions. [2022-03-01 17:35:31,222 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 2950 transitions. Word has length 17 [2022-03-01 17:35:31,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:31,222 INFO L470 AbstractCegarLoop]: Abstraction has 995 states and 2950 transitions. [2022-03-01 17:35:31,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:31,222 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 2950 transitions. [2022-03-01 17:35:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:31,223 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:31,223 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:31,239 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (315)] Ended with exit code 0 [2022-03-01 17:35:31,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 315 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2022-03-01 17:35:31,424 INFO L402 AbstractCegarLoop]: === Iteration 325 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash -286746665, now seen corresponding path program 311 times [2022-03-01 17:35:31,424 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:31,424 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375270106] [2022-03-01 17:35:31,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:31,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:31,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:31,522 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:31,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375270106] [2022-03-01 17:35:31,522 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375270106] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:31,522 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962563835] [2022-03-01 17:35:31,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:31,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:31,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:31,524 INFO L229 MonitoredProcess]: Starting monitored process 316 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:31,524 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Waiting until timeout for monitored process [2022-03-01 17:35:31,549 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:35:31,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:31,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:31,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:31,720 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:31,721 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:31,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:31,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:31,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:31,848 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:31,848 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:31,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:31,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962563835] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:31,872 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:31,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:35:31,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806825817] [2022-03-01 17:35:31,872 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:31,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:31,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:31,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:31,873 INFO L87 Difference]: Start difference. First operand 995 states and 2950 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:32,453 INFO L93 Difference]: Finished difference Result 1142 states and 3204 transitions. [2022-03-01 17:35:32,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:35:32,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:32,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:32,455 INFO L225 Difference]: With dead ends: 1142 [2022-03-01 17:35:32,456 INFO L226 Difference]: Without dead ends: 1142 [2022-03-01 17:35:32,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:35:32,456 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 91 mSDsluCounter, 275 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 79 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:32,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 108 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 596 Invalid, 0 Unknown, 79 Unchecked, 0.2s Time] [2022-03-01 17:35:32,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1142 states. [2022-03-01 17:35:32,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1142 to 987. [2022-03-01 17:35:32,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.9614604462474645) internal successors, (2920), 986 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:32,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2920 transitions. [2022-03-01 17:35:32,467 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2920 transitions. Word has length 17 [2022-03-01 17:35:32,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:32,467 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 2920 transitions. [2022-03-01 17:35:32,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:32,467 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2920 transitions. [2022-03-01 17:35:32,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:32,468 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:32,468 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:32,483 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (316)] Ended with exit code 0 [2022-03-01 17:35:32,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 316 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2022-03-01 17:35:32,669 INFO L402 AbstractCegarLoop]: === Iteration 326 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:32,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:32,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1776151661, now seen corresponding path program 312 times [2022-03-01 17:35:32,669 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:32,669 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434084746] [2022-03-01 17:35:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:32,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:32,755 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:32,755 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:32,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434084746] [2022-03-01 17:35:32,756 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434084746] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:32,756 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286922977] [2022-03-01 17:35:32,756 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:32,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:32,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:32,757 INFO L229 MonitoredProcess]: Starting monitored process 317 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:32,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Waiting until timeout for monitored process [2022-03-01 17:35:32,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:35:32,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:32,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:32,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:32,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:32,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:32,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:32,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:32,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:32,967 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:33,057 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:33,057 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:33,059 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:33,080 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:33,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286922977] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:33,081 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:33,081 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:35:33,081 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041108776] [2022-03-01 17:35:33,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:33,081 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:33,081 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:33,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:33,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:33,081 INFO L87 Difference]: Start difference. First operand 987 states and 2920 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:33,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:33,318 INFO L93 Difference]: Finished difference Result 1098 states and 3114 transitions. [2022-03-01 17:35:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:35:33,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:33,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:33,320 INFO L225 Difference]: With dead ends: 1098 [2022-03-01 17:35:33,320 INFO L226 Difference]: Without dead ends: 1098 [2022-03-01 17:35:33,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:35:33,320 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 58 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 523 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:33,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 118 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 523 Invalid, 0 Unknown, 126 Unchecked, 0.2s Time] [2022-03-01 17:35:33,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1098 states. [2022-03-01 17:35:33,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1098 to 987. [2022-03-01 17:35:33,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 987 states, 986 states have (on average 2.9614604462474645) internal successors, (2920), 986 states have internal predecessors, (2920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 2920 transitions. [2022-03-01 17:35:33,330 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 2920 transitions. Word has length 17 [2022-03-01 17:35:33,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:33,330 INFO L470 AbstractCegarLoop]: Abstraction has 987 states and 2920 transitions. [2022-03-01 17:35:33,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 2920 transitions. [2022-03-01 17:35:33,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:33,331 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:33,331 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:33,347 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (317)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:33,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,317 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:33,532 INFO L402 AbstractCegarLoop]: === Iteration 327 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:33,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:33,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1799298487, now seen corresponding path program 313 times [2022-03-01 17:35:33,532 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:33,532 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752713436] [2022-03-01 17:35:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:33,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:33,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:33,625 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:33,625 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752713436] [2022-03-01 17:35:33,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752713436] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:33,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656122118] [2022-03-01 17:35:33,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:33,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:33,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:33,627 INFO L229 MonitoredProcess]: Starting monitored process 318 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:33,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Waiting until timeout for monitored process [2022-03-01 17:35:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:33,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:33,790 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:33,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:33,792 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:33,793 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:33,871 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:33,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:33,957 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:33,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:33,959 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:33,985 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:33,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656122118] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:33,985 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:33,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:35:33,985 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084402259] [2022-03-01 17:35:33,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:33,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:33,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:33,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:33,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:33,986 INFO L87 Difference]: Start difference. First operand 987 states and 2920 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:34,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:34,583 INFO L93 Difference]: Finished difference Result 1131 states and 3192 transitions. [2022-03-01 17:35:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:35:34,583 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:34,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:34,585 INFO L225 Difference]: With dead ends: 1131 [2022-03-01 17:35:34,585 INFO L226 Difference]: Without dead ends: 1127 [2022-03-01 17:35:34,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:35:34,585 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 145 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:34,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 84 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:35:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1127 states. [2022-03-01 17:35:34,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1127 to 1007. [2022-03-01 17:35:34,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 2.963220675944334) internal successors, (2981), 1006 states have internal predecessors, (2981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:34,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 2981 transitions. [2022-03-01 17:35:34,596 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 2981 transitions. Word has length 17 [2022-03-01 17:35:34,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:34,596 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 2981 transitions. [2022-03-01 17:35:34,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:34,596 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 2981 transitions. [2022-03-01 17:35:34,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:34,597 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:34,597 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:34,613 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (318)] Ended with exit code 0 [2022-03-01 17:35:34,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,318 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:34,798 INFO L402 AbstractCegarLoop]: === Iteration 328 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:34,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:34,798 INFO L85 PathProgramCache]: Analyzing trace with hash -766621475, now seen corresponding path program 314 times [2022-03-01 17:35:34,798 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:34,798 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8677530] [2022-03-01 17:35:34,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:34,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:34,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:34,889 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:34,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8677530] [2022-03-01 17:35:34,889 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8677530] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:34,889 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453840370] [2022-03-01 17:35:34,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:34,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:34,889 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:34,890 INFO L229 MonitoredProcess]: Starting monitored process 319 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:34,890 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Waiting until timeout for monitored process [2022-03-01 17:35:34,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:34,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:34,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:34,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:35,104 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:35,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:35:35,106 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:35,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:35:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:35,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:35,237 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:35,237 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:35,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:35,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:35,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453840370] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:35,266 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:35,266 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:35:35,266 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779462599] [2022-03-01 17:35:35,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:35,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:35,266 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:35,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:35,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:35,267 INFO L87 Difference]: Start difference. First operand 1007 states and 2981 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:35,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:35,780 INFO L93 Difference]: Finished difference Result 1080 states and 3097 transitions. [2022-03-01 17:35:35,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:35:35,780 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:35,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:35,782 INFO L225 Difference]: With dead ends: 1080 [2022-03-01 17:35:35,782 INFO L226 Difference]: Without dead ends: 1076 [2022-03-01 17:35:35,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:35:35,782 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 49 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:35,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 104 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 627 Invalid, 0 Unknown, 5 Unchecked, 0.2s Time] [2022-03-01 17:35:35,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-03-01 17:35:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1009. [2022-03-01 17:35:35,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1009 states, 1008 states have (on average 2.9623015873015874) internal successors, (2986), 1008 states have internal predecessors, (2986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:35,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1009 states to 1009 states and 2986 transitions. [2022-03-01 17:35:35,793 INFO L78 Accepts]: Start accepts. Automaton has 1009 states and 2986 transitions. Word has length 17 [2022-03-01 17:35:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:35,793 INFO L470 AbstractCegarLoop]: Abstraction has 1009 states and 2986 transitions. [2022-03-01 17:35:35,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1009 states and 2986 transitions. [2022-03-01 17:35:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:35,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:35,794 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:35,810 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (319)] Ended with exit code 0 [2022-03-01 17:35:35,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable327,319 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:35,995 INFO L402 AbstractCegarLoop]: === Iteration 329 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:35,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:35,995 INFO L85 PathProgramCache]: Analyzing trace with hash 262360839, now seen corresponding path program 315 times [2022-03-01 17:35:35,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:35,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368658433] [2022-03-01 17:35:35,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:35,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:35,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:36,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:36,086 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:36,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368658433] [2022-03-01 17:35:36,086 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [368658433] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:36,086 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320792627] [2022-03-01 17:35:36,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:36,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:36,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:36,087 INFO L229 MonitoredProcess]: Starting monitored process 320 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:36,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Waiting until timeout for monitored process [2022-03-01 17:35:36,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:35:36,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:36,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:35:36,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:36,319 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:36,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:35:36,321 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:36,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:35:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:36,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:36,447 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:36,447 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:36,449 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:36,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:36,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320792627] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:36,476 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:36,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:35:36,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974605765] [2022-03-01 17:35:36,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:36,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:36,476 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:36,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:36,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:36,477 INFO L87 Difference]: Start difference. First operand 1009 states and 2986 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:37,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:37,004 INFO L93 Difference]: Finished difference Result 1090 states and 3105 transitions. [2022-03-01 17:35:37,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:35:37,005 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:37,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:37,006 INFO L225 Difference]: With dead ends: 1090 [2022-03-01 17:35:37,006 INFO L226 Difference]: Without dead ends: 1084 [2022-03-01 17:35:37,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:35:37,007 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:37,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 140 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 667 Invalid, 0 Unknown, 67 Unchecked, 0.2s Time] [2022-03-01 17:35:37,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1084 states. [2022-03-01 17:35:37,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1084 to 1007. [2022-03-01 17:35:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 1006 states have (on average 2.956262425447316) internal successors, (2974), 1006 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 2974 transitions. [2022-03-01 17:35:37,024 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 2974 transitions. Word has length 17 [2022-03-01 17:35:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:37,024 INFO L470 AbstractCegarLoop]: Abstraction has 1007 states and 2974 transitions. [2022-03-01 17:35:37,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:37,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 2974 transitions. [2022-03-01 17:35:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:37,026 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:37,026 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:37,041 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (320)] Ended with exit code 0 [2022-03-01 17:35:37,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,320 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:37,226 INFO L402 AbstractCegarLoop]: === Iteration 330 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:37,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:37,227 INFO L85 PathProgramCache]: Analyzing trace with hash 1294238327, now seen corresponding path program 316 times [2022-03-01 17:35:37,227 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:37,227 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029697758] [2022-03-01 17:35:37,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:37,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:37,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:37,315 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:37,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029697758] [2022-03-01 17:35:37,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029697758] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:37,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105662504] [2022-03-01 17:35:37,315 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:37,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:37,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:37,316 INFO L229 MonitoredProcess]: Starting monitored process 321 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:37,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Waiting until timeout for monitored process [2022-03-01 17:35:37,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:37,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:37,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:37,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:37,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:37,530 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:35:37,532 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:37,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:35:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:37,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:37,652 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:37,652 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:37,654 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:37,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:37,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105662504] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:37,680 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:37,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:35:37,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133015978] [2022-03-01 17:35:37,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:37,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:37,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:37,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:37,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:37,681 INFO L87 Difference]: Start difference. First operand 1007 states and 2974 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:38,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:38,114 INFO L93 Difference]: Finished difference Result 1056 states and 3049 transitions. [2022-03-01 17:35:38,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:35:38,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:38,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:38,116 INFO L225 Difference]: With dead ends: 1056 [2022-03-01 17:35:38,116 INFO L226 Difference]: Without dead ends: 1052 [2022-03-01 17:35:38,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=863, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:35:38,116 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 53 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 535 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 21 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:38,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 92 Invalid, 561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 535 Invalid, 0 Unknown, 21 Unchecked, 0.2s Time] [2022-03-01 17:35:38,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2022-03-01 17:35:38,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1016. [2022-03-01 17:35:38,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1015 states have (on average 2.9517241379310346) internal successors, (2996), 1015 states have internal predecessors, (2996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:38,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 2996 transitions. [2022-03-01 17:35:38,127 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 2996 transitions. Word has length 17 [2022-03-01 17:35:38,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:38,127 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 2996 transitions. [2022-03-01 17:35:38,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 2996 transitions. [2022-03-01 17:35:38,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:38,128 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:38,128 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:38,144 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (321)] Ended with exit code 0 [2022-03-01 17:35:38,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,321 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:38,328 INFO L402 AbstractCegarLoop]: === Iteration 331 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:38,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:38,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1971746655, now seen corresponding path program 317 times [2022-03-01 17:35:38,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:38,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055127330] [2022-03-01 17:35:38,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:38,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:38,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:38,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:38,423 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:38,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055127330] [2022-03-01 17:35:38,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055127330] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:38,423 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851597443] [2022-03-01 17:35:38,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:38,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:38,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:38,424 INFO L229 MonitoredProcess]: Starting monitored process 322 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:38,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Waiting until timeout for monitored process [2022-03-01 17:35:38,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:35:38,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:38,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:38,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:38,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:38,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:35:38,660 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:38,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:35:38,703 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:38,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:38,782 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:38,782 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:38,784 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:38,810 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:38,811 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851597443] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:38,811 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:38,811 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:35:38,811 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793056020] [2022-03-01 17:35:38,811 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:38,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:38,811 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:38,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:38,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:38,811 INFO L87 Difference]: Start difference. First operand 1016 states and 2996 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:39,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:39,238 INFO L93 Difference]: Finished difference Result 1083 states and 3079 transitions. [2022-03-01 17:35:39,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:35:39,238 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:39,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:39,240 INFO L225 Difference]: With dead ends: 1083 [2022-03-01 17:35:39,240 INFO L226 Difference]: Without dead ends: 1077 [2022-03-01 17:35:39,240 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:35:39,240 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 52 mSDsluCounter, 238 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:39,240 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 112 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 448 Invalid, 0 Unknown, 59 Unchecked, 0.2s Time] [2022-03-01 17:35:39,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1077 states. [2022-03-01 17:35:39,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1077 to 1014. [2022-03-01 17:35:39,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 2.9506416584402766) internal successors, (2989), 1013 states have internal predecessors, (2989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:39,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 2989 transitions. [2022-03-01 17:35:39,251 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 2989 transitions. Word has length 17 [2022-03-01 17:35:39,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:39,251 INFO L470 AbstractCegarLoop]: Abstraction has 1014 states and 2989 transitions. [2022-03-01 17:35:39,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:39,251 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 2989 transitions. [2022-03-01 17:35:39,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:39,252 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:39,252 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:39,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (322)] Ended with exit code 0 [2022-03-01 17:35:39,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable330 [2022-03-01 17:35:39,453 INFO L402 AbstractCegarLoop]: === Iteration 332 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:39,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:39,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1134874027, now seen corresponding path program 318 times [2022-03-01 17:35:39,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:39,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222665396] [2022-03-01 17:35:39,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:39,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:39,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:39,559 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:39,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222665396] [2022-03-01 17:35:39,559 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222665396] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:39,559 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981557846] [2022-03-01 17:35:39,560 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:39,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:39,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:39,561 INFO L229 MonitoredProcess]: Starting monitored process 323 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:39,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Waiting until timeout for monitored process [2022-03-01 17:35:39,584 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:35:39,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:39,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:39,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:39,799 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:39,799 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:35:39,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:39,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:35:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:39,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:39,920 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:39,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:39,922 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:39,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:35:39,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981557846] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:39,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:39,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:35:39,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099105556] [2022-03-01 17:35:39,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:39,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:39,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:39,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:39,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:39,948 INFO L87 Difference]: Start difference. First operand 1014 states and 2989 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:40,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:40,407 INFO L93 Difference]: Finished difference Result 1084 states and 3075 transitions. [2022-03-01 17:35:40,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:35:40,407 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:40,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:40,409 INFO L225 Difference]: With dead ends: 1084 [2022-03-01 17:35:40,409 INFO L226 Difference]: Without dead ends: 1076 [2022-03-01 17:35:40,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:35:40,409 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 60 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:40,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 118 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 587 Invalid, 0 Unknown, 62 Unchecked, 0.2s Time] [2022-03-01 17:35:40,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2022-03-01 17:35:40,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 1013. [2022-03-01 17:35:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 2.9446640316205532) internal successors, (2980), 1012 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:40,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 2980 transitions. [2022-03-01 17:35:40,421 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 2980 transitions. Word has length 17 [2022-03-01 17:35:40,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:40,421 INFO L470 AbstractCegarLoop]: Abstraction has 1013 states and 2980 transitions. [2022-03-01 17:35:40,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:40,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 2980 transitions. [2022-03-01 17:35:40,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:40,422 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:40,422 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:40,438 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (323)] Ended with exit code 0 [2022-03-01 17:35:40,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,323 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:40,623 INFO L402 AbstractCegarLoop]: === Iteration 333 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:40,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:40,623 INFO L85 PathProgramCache]: Analyzing trace with hash -902314287, now seen corresponding path program 319 times [2022-03-01 17:35:40,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:40,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340063764] [2022-03-01 17:35:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:40,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:40,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:40,733 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:40,733 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:40,733 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340063764] [2022-03-01 17:35:40,733 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340063764] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:40,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154360779] [2022-03-01 17:35:40,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:40,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:40,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:40,735 INFO L229 MonitoredProcess]: Starting monitored process 324 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:40,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Waiting until timeout for monitored process [2022-03-01 17:35:40,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:40,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:40,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:40,923 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:40,925 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:40,925 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:41,007 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:41,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:41,121 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:41,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:35:41,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:41,146 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:41,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154360779] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:41,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:41,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:35:41,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22874797] [2022-03-01 17:35:41,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:41,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:35:41,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:41,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:35:41,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:41,147 INFO L87 Difference]: Start difference. First operand 1013 states and 2980 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:41,578 INFO L93 Difference]: Finished difference Result 1206 states and 3351 transitions. [2022-03-01 17:35:41,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:35:41,578 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:41,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:41,579 INFO L225 Difference]: With dead ends: 1206 [2022-03-01 17:35:41,579 INFO L226 Difference]: Without dead ends: 1205 [2022-03-01 17:35:41,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:35:41,580 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 129 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:41,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 122 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:35:41,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2022-03-01 17:35:41,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1039. [2022-03-01 17:35:41,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1039 states, 1038 states have (on average 2.964354527938343) internal successors, (3077), 1038 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:41,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 3077 transitions. [2022-03-01 17:35:41,592 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 3077 transitions. Word has length 17 [2022-03-01 17:35:41,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:41,592 INFO L470 AbstractCegarLoop]: Abstraction has 1039 states and 3077 transitions. [2022-03-01 17:35:41,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:41,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 3077 transitions. [2022-03-01 17:35:41,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:41,593 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:41,593 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:41,608 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (324)] Ended with exit code 0 [2022-03-01 17:35:41,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2022-03-01 17:35:41,793 INFO L402 AbstractCegarLoop]: === Iteration 334 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:41,793 INFO L85 PathProgramCache]: Analyzing trace with hash -100698059, now seen corresponding path program 320 times [2022-03-01 17:35:41,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:41,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591563658] [2022-03-01 17:35:41,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:41,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:41,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:41,903 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:41,903 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:41,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591563658] [2022-03-01 17:35:41,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591563658] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:41,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907927986] [2022-03-01 17:35:41,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:41,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:41,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:41,904 INFO L229 MonitoredProcess]: Starting monitored process 325 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:41,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Waiting until timeout for monitored process [2022-03-01 17:35:41,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:41,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:41,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:41,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:42,088 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:42,089 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:42,090 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:42,090 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:42,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:42,300 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:42,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:42,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:42,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907927986] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:42,320 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:42,320 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:35:42,320 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191775849] [2022-03-01 17:35:42,320 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:42,320 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:35:42,320 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:42,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:35:42,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:35:42,321 INFO L87 Difference]: Start difference. First operand 1039 states and 3077 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:43,780 INFO L93 Difference]: Finished difference Result 1285 states and 3514 transitions. [2022-03-01 17:35:43,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:35:43,780 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:43,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:43,782 INFO L225 Difference]: With dead ends: 1285 [2022-03-01 17:35:43,782 INFO L226 Difference]: Without dead ends: 1274 [2022-03-01 17:35:43,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 921 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=513, Invalid=2793, Unknown=0, NotChecked=0, Total=3306 [2022-03-01 17:35:43,783 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 179 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 984 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:43,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 162 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 984 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:35:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-03-01 17:35:43,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1072. [2022-03-01 17:35:43,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 2.9710550887021476) internal successors, (3182), 1071 states have internal predecessors, (3182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:43,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 3182 transitions. [2022-03-01 17:35:43,801 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 3182 transitions. Word has length 17 [2022-03-01 17:35:43,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:43,801 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 3182 transitions. [2022-03-01 17:35:43,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:43,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 3182 transitions. [2022-03-01 17:35:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:43,803 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:43,803 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:43,818 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (325)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:44,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 325 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2022-03-01 17:35:44,003 INFO L402 AbstractCegarLoop]: === Iteration 335 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:44,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1617645647, now seen corresponding path program 321 times [2022-03-01 17:35:44,004 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:44,004 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552037486] [2022-03-01 17:35:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:44,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:44,103 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:44,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552037486] [2022-03-01 17:35:44,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552037486] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:44,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864661836] [2022-03-01 17:35:44,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:44,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:44,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:44,104 INFO L229 MonitoredProcess]: Starting monitored process 326 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:44,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Waiting until timeout for monitored process [2022-03-01 17:35:44,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:35:44,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:44,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:44,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:44,287 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:44,287 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:35:44,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:44,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:35:44,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:44,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:44,464 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:44,464 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:44,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:44,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864661836] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:44,484 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:44,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:35:44,485 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237674452] [2022-03-01 17:35:44,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:44,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:35:44,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:44,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:35:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:44,485 INFO L87 Difference]: Start difference. First operand 1072 states and 3182 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:45,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:45,483 INFO L93 Difference]: Finished difference Result 1247 states and 3419 transitions. [2022-03-01 17:35:45,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:35:45,484 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:45,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:45,485 INFO L225 Difference]: With dead ends: 1247 [2022-03-01 17:35:45,485 INFO L226 Difference]: Without dead ends: 1243 [2022-03-01 17:35:45,485 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=304, Invalid=1676, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:35:45,486 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 110 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:45,486 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 88 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:35:45,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-03-01 17:35:45,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1032. [2022-03-01 17:35:45,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 2.942774005819593) internal successors, (3034), 1031 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3034 transitions. [2022-03-01 17:35:45,497 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3034 transitions. Word has length 17 [2022-03-01 17:35:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:45,497 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 3034 transitions. [2022-03-01 17:35:45,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3034 transitions. [2022-03-01 17:35:45,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:45,498 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:45,498 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:45,514 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (326)] Ended with exit code 0 [2022-03-01 17:35:45,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2022-03-01 17:35:45,699 INFO L402 AbstractCegarLoop]: === Iteration 336 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:45,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:45,699 INFO L85 PathProgramCache]: Analyzing trace with hash -92967661, now seen corresponding path program 322 times [2022-03-01 17:35:45,699 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:45,699 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59626462] [2022-03-01 17:35:45,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:45,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:45,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:45,798 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:45,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59626462] [2022-03-01 17:35:45,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59626462] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:45,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449008286] [2022-03-01 17:35:45,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:45,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:45,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:45,799 INFO L229 MonitoredProcess]: Starting monitored process 327 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:45,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Waiting until timeout for monitored process [2022-03-01 17:35:45,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:45,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:45,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:45,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:46,009 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:46,010 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:46,012 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:46,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:46,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:46,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:46,155 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:46,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:46,157 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:46,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449008286] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:46,176 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:46,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:35:46,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669163533] [2022-03-01 17:35:46,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:46,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:35:46,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:46,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:35:46,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:46,176 INFO L87 Difference]: Start difference. First operand 1032 states and 3034 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:47,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:47,151 INFO L93 Difference]: Finished difference Result 1198 states and 3317 transitions. [2022-03-01 17:35:47,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:35:47,151 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:47,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:47,153 INFO L225 Difference]: With dead ends: 1198 [2022-03-01 17:35:47,153 INFO L226 Difference]: Without dead ends: 1194 [2022-03-01 17:35:47,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:35:47,153 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 734 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:47,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 82 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 734 Invalid, 0 Unknown, 81 Unchecked, 0.3s Time] [2022-03-01 17:35:47,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2022-03-01 17:35:47,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 1022. [2022-03-01 17:35:47,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 2.9373163565132225) internal successors, (2999), 1021 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:47,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 2999 transitions. [2022-03-01 17:35:47,165 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 2999 transitions. Word has length 17 [2022-03-01 17:35:47,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:47,165 INFO L470 AbstractCegarLoop]: Abstraction has 1022 states and 2999 transitions. [2022-03-01 17:35:47,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:47,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 2999 transitions. [2022-03-01 17:35:47,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:47,166 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:47,166 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:47,181 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (327)] Ended with exit code 0 [2022-03-01 17:35:47,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,327 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:47,366 INFO L402 AbstractCegarLoop]: === Iteration 337 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:47,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1514553525, now seen corresponding path program 323 times [2022-03-01 17:35:47,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:47,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445905575] [2022-03-01 17:35:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:47,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:47,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:47,464 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:47,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445905575] [2022-03-01 17:35:47,464 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [445905575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:47,464 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524331294] [2022-03-01 17:35:47,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:47,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:47,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:47,465 INFO L229 MonitoredProcess]: Starting monitored process 328 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:47,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Waiting until timeout for monitored process [2022-03-01 17:35:47,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:35:47,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:47,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:47,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:47,689 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:47,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:47,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:47,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:47,717 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:47,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:47,840 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:47,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:47,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:47,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524331294] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:47,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:47,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:35:47,861 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787429405] [2022-03-01 17:35:47,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:47,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:35:47,861 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:47,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:35:47,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:47,862 INFO L87 Difference]: Start difference. First operand 1022 states and 2999 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:49,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:49,214 INFO L93 Difference]: Finished difference Result 1166 states and 3237 transitions. [2022-03-01 17:35:49,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:35:49,214 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:49,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:49,215 INFO L225 Difference]: With dead ends: 1166 [2022-03-01 17:35:49,215 INFO L226 Difference]: Without dead ends: 1166 [2022-03-01 17:35:49,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=437, Invalid=2533, Unknown=0, NotChecked=0, Total=2970 [2022-03-01 17:35:49,216 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:49,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 104 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 890 Invalid, 0 Unknown, 58 Unchecked, 0.4s Time] [2022-03-01 17:35:49,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1166 states. [2022-03-01 17:35:49,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1166 to 1023. [2022-03-01 17:35:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.936399217221135) internal successors, (3001), 1022 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3001 transitions. [2022-03-01 17:35:49,227 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3001 transitions. Word has length 17 [2022-03-01 17:35:49,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:49,227 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 3001 transitions. [2022-03-01 17:35:49,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:49,227 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3001 transitions. [2022-03-01 17:35:49,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:49,228 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:49,228 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:49,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (328)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:49,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 328 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2022-03-01 17:35:49,429 INFO L402 AbstractCegarLoop]: === Iteration 338 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1685255955, now seen corresponding path program 324 times [2022-03-01 17:35:49,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:49,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964502322] [2022-03-01 17:35:49,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:49,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:49,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:49,525 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:49,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964502322] [2022-03-01 17:35:49,526 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964502322] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:49,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163622623] [2022-03-01 17:35:49,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:49,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:49,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:49,527 INFO L229 MonitoredProcess]: Starting monitored process 329 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:49,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Waiting until timeout for monitored process [2022-03-01 17:35:49,552 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:35:49,552 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:49,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:49,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:49,766 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:49,766 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:49,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:49,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:49,791 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:49,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:49,918 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:49,918 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:49,920 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:49,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:49,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163622623] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:49,939 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:49,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:35:49,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813257269] [2022-03-01 17:35:49,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:49,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:35:49,939 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:49,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:35:49,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:49,939 INFO L87 Difference]: Start difference. First operand 1023 states and 3001 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:50,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:50,885 INFO L93 Difference]: Finished difference Result 1161 states and 3229 transitions. [2022-03-01 17:35:50,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:35:50,885 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:50,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:50,887 INFO L225 Difference]: With dead ends: 1161 [2022-03-01 17:35:50,887 INFO L226 Difference]: Without dead ends: 1161 [2022-03-01 17:35:50,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:35:50,888 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 69 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:50,888 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 56 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 636 Invalid, 0 Unknown, 49 Unchecked, 0.3s Time] [2022-03-01 17:35:50,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-03-01 17:35:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1012. [2022-03-01 17:35:50,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1012 states, 1011 states have (on average 2.9357072205736894) internal successors, (2968), 1011 states have internal predecessors, (2968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:50,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 2968 transitions. [2022-03-01 17:35:50,905 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 2968 transitions. Word has length 17 [2022-03-01 17:35:50,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:50,905 INFO L470 AbstractCegarLoop]: Abstraction has 1012 states and 2968 transitions. [2022-03-01 17:35:50,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:50,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 2968 transitions. [2022-03-01 17:35:50,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:50,906 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:50,906 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:50,922 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (329)] Ended with exit code 0 [2022-03-01 17:35:51,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable337 [2022-03-01 17:35:51,107 INFO L402 AbstractCegarLoop]: === Iteration 339 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:51,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:51,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1582372657, now seen corresponding path program 325 times [2022-03-01 17:35:51,107 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:51,107 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698140721] [2022-03-01 17:35:51,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:51,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:51,205 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:51,205 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:51,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698140721] [2022-03-01 17:35:51,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698140721] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:51,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773834450] [2022-03-01 17:35:51,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:51,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:51,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:51,206 INFO L229 MonitoredProcess]: Starting monitored process 330 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:51,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Waiting until timeout for monitored process [2022-03-01 17:35:51,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:51,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:51,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:51,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:51,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:51,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:51,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:51,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:51,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:51,543 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:51,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:51,545 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:51,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:51,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773834450] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:51,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:51,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:35:51,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157705970] [2022-03-01 17:35:51,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:51,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:35:51,564 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:51,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:35:51,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:35:51,564 INFO L87 Difference]: Start difference. First operand 1012 states and 2968 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:52,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:52,186 INFO L93 Difference]: Finished difference Result 1114 states and 3151 transitions. [2022-03-01 17:35:52,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:35:52,187 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:52,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:52,188 INFO L225 Difference]: With dead ends: 1114 [2022-03-01 17:35:52,188 INFO L226 Difference]: Without dead ends: 1114 [2022-03-01 17:35:52,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:35:52,189 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 52 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:52,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 46 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 595 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-03-01 17:35:52,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2022-03-01 17:35:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 1023. [2022-03-01 17:35:52,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.9334637964774952) internal successors, (2998), 1022 states have internal predecessors, (2998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:52,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2998 transitions. [2022-03-01 17:35:52,208 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2998 transitions. Word has length 17 [2022-03-01 17:35:52,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:52,208 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 2998 transitions. [2022-03-01 17:35:52,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:52,208 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2998 transitions. [2022-03-01 17:35:52,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:52,209 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:52,209 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:52,225 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (330)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:52,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2022-03-01 17:35:52,410 INFO L402 AbstractCegarLoop]: === Iteration 340 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:52,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:52,410 INFO L85 PathProgramCache]: Analyzing trace with hash -509287277, now seen corresponding path program 326 times [2022-03-01 17:35:52,410 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:52,410 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930332175] [2022-03-01 17:35:52,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:52,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:52,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:52,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:52,515 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:52,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930332175] [2022-03-01 17:35:52,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930332175] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:52,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492065375] [2022-03-01 17:35:52,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:52,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:52,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:52,516 INFO L229 MonitoredProcess]: Starting monitored process 331 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:52,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Waiting until timeout for monitored process [2022-03-01 17:35:52,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:52,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:52,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:52,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:52,715 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:52,715 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:52,717 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:52,717 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:52,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:52,829 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:35:52,829 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:35:52,831 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:35:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:52,849 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492065375] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:52,850 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:52,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:35:52,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355707981] [2022-03-01 17:35:52,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:52,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:52,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:52,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:52,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:52,850 INFO L87 Difference]: Start difference. First operand 1023 states and 2998 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:53,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:53,084 INFO L93 Difference]: Finished difference Result 1112 states and 3160 transitions. [2022-03-01 17:35:53,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:35:53,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:53,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:53,085 INFO L225 Difference]: With dead ends: 1112 [2022-03-01 17:35:53,085 INFO L226 Difference]: Without dead ends: 1112 [2022-03-01 17:35:53,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:53,086 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 56 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 191 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:53,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 70 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 499 Invalid, 0 Unknown, 191 Unchecked, 0.2s Time] [2022-03-01 17:35:53,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-03-01 17:35:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1024. [2022-03-01 17:35:53,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1023 states have (on average 2.9335288367546433) internal successors, (3001), 1023 states have internal predecessors, (3001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:53,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 3001 transitions. [2022-03-01 17:35:53,097 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 3001 transitions. Word has length 17 [2022-03-01 17:35:53,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:53,097 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 3001 transitions. [2022-03-01 17:35:53,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:53,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 3001 transitions. [2022-03-01 17:35:53,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:53,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:53,098 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:53,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (331)] Ended with exit code 0 [2022-03-01 17:35:53,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,331 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:53,298 INFO L402 AbstractCegarLoop]: === Iteration 341 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:53,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:53,299 INFO L85 PathProgramCache]: Analyzing trace with hash 879028083, now seen corresponding path program 327 times [2022-03-01 17:35:53,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:53,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922842602] [2022-03-01 17:35:53,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:53,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:53,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:53,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:53,402 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:53,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922842602] [2022-03-01 17:35:53,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922842602] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:53,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372183149] [2022-03-01 17:35:53,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:53,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:53,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:53,404 INFO L229 MonitoredProcess]: Starting monitored process 332 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:53,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Waiting until timeout for monitored process [2022-03-01 17:35:53,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:35:53,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:53,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:53,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:53,560 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:35:53,562 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:35:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:53,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:53,681 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:35:53,681 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:35:53,683 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:35:53,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:53,697 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372183149] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:53,697 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:53,697 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-01 17:35:53,697 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435868943] [2022-03-01 17:35:53,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:53,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:35:53,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:53,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:35:53,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:35:53,697 INFO L87 Difference]: Start difference. First operand 1024 states and 3001 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:53,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:53,982 INFO L93 Difference]: Finished difference Result 1304 states and 3735 transitions. [2022-03-01 17:35:53,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-01 17:35:53,983 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:53,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:53,984 INFO L225 Difference]: With dead ends: 1304 [2022-03-01 17:35:53,984 INFO L226 Difference]: Without dead ends: 1304 [2022-03-01 17:35:53,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:35:53,984 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 44 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 500 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:53,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 38 Invalid, 500 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:35:53,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2022-03-01 17:35:53,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1023. [2022-03-01 17:35:53,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.935420743639922) internal successors, (3000), 1022 states have internal predecessors, (3000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:53,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3000 transitions. [2022-03-01 17:35:53,996 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3000 transitions. Word has length 17 [2022-03-01 17:35:53,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:53,996 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 3000 transitions. [2022-03-01 17:35:53,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:53,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3000 transitions. [2022-03-01 17:35:53,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:53,997 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:53,997 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:54,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (332)] Ended with exit code 0 [2022-03-01 17:35:54,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,332 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:54,198 INFO L402 AbstractCegarLoop]: === Iteration 342 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:54,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:54,198 INFO L85 PathProgramCache]: Analyzing trace with hash 744702619, now seen corresponding path program 328 times [2022-03-01 17:35:54,198 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:54,198 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429366566] [2022-03-01 17:35:54,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:54,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:54,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:54,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:54,298 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:54,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429366566] [2022-03-01 17:35:54,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429366566] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:54,298 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253808834] [2022-03-01 17:35:54,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:35:54,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:54,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:54,299 INFO L229 MonitoredProcess]: Starting monitored process 333 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:54,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Waiting until timeout for monitored process [2022-03-01 17:35:54,323 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:35:54,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:54,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:54,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:54,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:35:54,468 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:35:54,499 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:54,499 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:54,580 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:35:54,581 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:35:54,582 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:54,600 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:54,600 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253808834] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:54,600 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:54,600 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-03-01 17:35:54,600 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734900803] [2022-03-01 17:35:54,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:54,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-01 17:35:54,601 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:54,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-01 17:35:54,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2022-03-01 17:35:54,601 INFO L87 Difference]: Start difference. First operand 1023 states and 3000 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:54,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:54,963 INFO L93 Difference]: Finished difference Result 1300 states and 3722 transitions. [2022-03-01 17:35:54,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:35:54,963 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:54,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:54,965 INFO L225 Difference]: With dead ends: 1300 [2022-03-01 17:35:54,965 INFO L226 Difference]: Without dead ends: 1295 [2022-03-01 17:35:54,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:35:54,965 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 43 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 465 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 465 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:54,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 42 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 465 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:35:54,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1295 states. [2022-03-01 17:35:54,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1295 to 1023. [2022-03-01 17:35:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 2.9344422700587085) internal successors, (2999), 1022 states have internal predecessors, (2999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 2999 transitions. [2022-03-01 17:35:54,977 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 2999 transitions. Word has length 17 [2022-03-01 17:35:54,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:54,977 INFO L470 AbstractCegarLoop]: Abstraction has 1023 states and 2999 transitions. [2022-03-01 17:35:54,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:54,977 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 2999 transitions. [2022-03-01 17:35:54,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:54,978 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:54,978 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:54,994 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (333)] Ended with exit code 0 [2022-03-01 17:35:55,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable341,333 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:55,179 INFO L402 AbstractCegarLoop]: === Iteration 343 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:55,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:55,179 INFO L85 PathProgramCache]: Analyzing trace with hash -773925291, now seen corresponding path program 329 times [2022-03-01 17:35:55,179 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:55,179 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302871582] [2022-03-01 17:35:55,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:55,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:55,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:55,284 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:55,284 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:55,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302871582] [2022-03-01 17:35:55,284 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302871582] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:55,284 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279846445] [2022-03-01 17:35:55,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:35:55,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:55,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:55,285 INFO L229 MonitoredProcess]: Starting monitored process 334 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:55,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Waiting until timeout for monitored process [2022-03-01 17:35:55,311 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:35:55,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:55,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:55,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:55,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:55,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:55,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:55,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:55,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:55,615 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:35:55,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:35:55,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:35:55,630 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:55,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279846445] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:55,630 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:55,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:35:55,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463964789] [2022-03-01 17:35:55,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:55,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:55,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:55,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:55,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:55,631 INFO L87 Difference]: Start difference. First operand 1023 states and 2999 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:55,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:55,941 INFO L93 Difference]: Finished difference Result 1322 states and 3770 transitions. [2022-03-01 17:35:55,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:35:55,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:55,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:55,943 INFO L225 Difference]: With dead ends: 1322 [2022-03-01 17:35:55,943 INFO L226 Difference]: Without dead ends: 1322 [2022-03-01 17:35:55,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:35:55,944 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:55,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 48 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 405 Invalid, 0 Unknown, 76 Unchecked, 0.2s Time] [2022-03-01 17:35:55,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2022-03-01 17:35:55,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1028. [2022-03-01 17:35:55,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.934761441090555) internal successors, (3014), 1027 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:55,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3014 transitions. [2022-03-01 17:35:55,955 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3014 transitions. Word has length 17 [2022-03-01 17:35:55,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:55,956 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 3014 transitions. [2022-03-01 17:35:55,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:55,956 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3014 transitions. [2022-03-01 17:35:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:55,957 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:55,957 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:55,973 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (334)] Ended with exit code 0 [2022-03-01 17:35:56,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2022-03-01 17:35:56,161 INFO L402 AbstractCegarLoop]: === Iteration 344 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash -1278985451, now seen corresponding path program 330 times [2022-03-01 17:35:56,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:56,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831092739] [2022-03-01 17:35:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:56,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:56,266 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:56,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831092739] [2022-03-01 17:35:56,266 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831092739] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:56,266 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866761672] [2022-03-01 17:35:56,267 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:35:56,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:56,268 INFO L229 MonitoredProcess]: Starting monitored process 335 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:56,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Waiting until timeout for monitored process [2022-03-01 17:35:56,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:35:56,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:56,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:56,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:56,463 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:56,463 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:56,465 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:56,466 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:56,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:56,489 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:56,602 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:35:56,602 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:35:56,604 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:35:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:56,618 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866761672] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:56,618 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:56,618 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:35:56,618 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799602451] [2022-03-01 17:35:56,618 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:56,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:56,618 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:56,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:56,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:56,619 INFO L87 Difference]: Start difference. First operand 1028 states and 3014 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:56,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:56,927 INFO L93 Difference]: Finished difference Result 1318 states and 3768 transitions. [2022-03-01 17:35:56,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:35:56,927 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:56,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:56,928 INFO L225 Difference]: With dead ends: 1318 [2022-03-01 17:35:56,928 INFO L226 Difference]: Without dead ends: 1318 [2022-03-01 17:35:56,929 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:35:56,929 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 44 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:56,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 26 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 388 Invalid, 0 Unknown, 153 Unchecked, 0.2s Time] [2022-03-01 17:35:56,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2022-03-01 17:35:56,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 1028. [2022-03-01 17:35:56,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.934761441090555) internal successors, (3014), 1027 states have internal predecessors, (3014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3014 transitions. [2022-03-01 17:35:56,940 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3014 transitions. Word has length 17 [2022-03-01 17:35:56,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:56,940 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 3014 transitions. [2022-03-01 17:35:56,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:56,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3014 transitions. [2022-03-01 17:35:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:56,941 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:56,941 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:56,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (335)] Ended with exit code 0 [2022-03-01 17:35:57,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2022-03-01 17:35:57,142 INFO L402 AbstractCegarLoop]: === Iteration 345 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:57,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:57,142 INFO L85 PathProgramCache]: Analyzing trace with hash 156957297, now seen corresponding path program 331 times [2022-03-01 17:35:57,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:57,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67231575] [2022-03-01 17:35:57,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:57,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:57,248 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:57,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:57,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67231575] [2022-03-01 17:35:57,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67231575] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:57,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660163309] [2022-03-01 17:35:57,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:35:57,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:57,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:57,249 INFO L229 MonitoredProcess]: Starting monitored process 336 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:57,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Waiting until timeout for monitored process [2022-03-01 17:35:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:57,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:57,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:57,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:57,471 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:35:57,473 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:57,473 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:35:57,511 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:57,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:57,609 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:35:57,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:35:57,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:35:57,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:57,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660163309] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:57,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:57,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:35:57,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105847444] [2022-03-01 17:35:57,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:57,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:35:57,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:57,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:35:57,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:35:57,642 INFO L87 Difference]: Start difference. First operand 1028 states and 3014 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:57,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:57,975 INFO L93 Difference]: Finished difference Result 1308 states and 3741 transitions. [2022-03-01 17:35:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:35:57,975 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:57,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:57,977 INFO L225 Difference]: With dead ends: 1308 [2022-03-01 17:35:57,977 INFO L226 Difference]: Without dead ends: 1304 [2022-03-01 17:35:57,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:35:57,977 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 62 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:57,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 50 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 369 Invalid, 0 Unknown, 62 Unchecked, 0.1s Time] [2022-03-01 17:35:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1304 states. [2022-03-01 17:35:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1304 to 1028. [2022-03-01 17:35:57,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1027 states have (on average 2.9337877312560856) internal successors, (3013), 1027 states have internal predecessors, (3013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:57,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 3013 transitions. [2022-03-01 17:35:57,989 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 3013 transitions. Word has length 17 [2022-03-01 17:35:57,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:57,989 INFO L470 AbstractCegarLoop]: Abstraction has 1028 states and 3013 transitions. [2022-03-01 17:35:57,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:57,989 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 3013 transitions. [2022-03-01 17:35:57,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:57,990 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:57,990 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:58,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (336)] Ended with exit code 0 [2022-03-01 17:35:58,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 336 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2022-03-01 17:35:58,190 INFO L402 AbstractCegarLoop]: === Iteration 346 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:58,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:58,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1934947405, now seen corresponding path program 332 times [2022-03-01 17:35:58,191 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:58,191 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113685094] [2022-03-01 17:35:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:58,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:58,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:58,300 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:58,300 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:58,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113685094] [2022-03-01 17:35:58,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113685094] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:58,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51586873] [2022-03-01 17:35:58,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:35:58,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:58,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:58,301 INFO L229 MonitoredProcess]: Starting monitored process 337 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:58,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Waiting until timeout for monitored process [2022-03-01 17:35:58,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:35:58,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:58,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:58,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:58,503 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:58,504 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:58,506 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:58,506 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:58,530 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:58,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:58,659 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:35:58,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:35:58,661 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:35:58,675 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:58,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51586873] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:58,675 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:58,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:35:58,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114061963] [2022-03-01 17:35:58,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:58,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:58,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:58,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:58,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:58,676 INFO L87 Difference]: Start difference. First operand 1028 states and 3013 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:59,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:35:59,155 INFO L93 Difference]: Finished difference Result 1334 states and 3797 transitions. [2022-03-01 17:35:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:35:59,155 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:35:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:35:59,157 INFO L225 Difference]: With dead ends: 1334 [2022-03-01 17:35:59,157 INFO L226 Difference]: Without dead ends: 1334 [2022-03-01 17:35:59,157 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:35:59,157 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 35 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 121 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:35:59,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 60 Invalid, 649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 518 Invalid, 0 Unknown, 121 Unchecked, 0.2s Time] [2022-03-01 17:35:59,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-03-01 17:35:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 1034. [2022-03-01 17:35:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.9351403678606003) internal successors, (3032), 1033 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:59,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3032 transitions. [2022-03-01 17:35:59,169 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3032 transitions. Word has length 17 [2022-03-01 17:35:59,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:35:59,169 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 3032 transitions. [2022-03-01 17:35:59,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:35:59,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3032 transitions. [2022-03-01 17:35:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:35:59,170 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:35:59,170 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:35:59,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (337)] Forceful destruction successful, exit code 0 [2022-03-01 17:35:59,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2022-03-01 17:35:59,371 INFO L402 AbstractCegarLoop]: === Iteration 347 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:35:59,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:35:59,371 INFO L85 PathProgramCache]: Analyzing trace with hash -205900071, now seen corresponding path program 333 times [2022-03-01 17:35:59,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:35:59,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784796503] [2022-03-01 17:35:59,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:35:59,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:35:59,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:35:59,480 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:59,481 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:35:59,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784796503] [2022-03-01 17:35:59,481 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784796503] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:35:59,481 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785224817] [2022-03-01 17:35:59,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:35:59,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:35:59,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:35:59,482 INFO L229 MonitoredProcess]: Starting monitored process 338 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:35:59,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Waiting until timeout for monitored process [2022-03-01 17:35:59,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:35:59,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:35:59,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:35:59,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:35:59,684 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:59,684 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:35:59,687 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:35:59,687 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:35:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:59,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:35:59,846 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:35:59,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:35:59,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:35:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:35:59,861 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785224817] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:35:59,861 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:35:59,861 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:35:59,862 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419608141] [2022-03-01 17:35:59,862 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:35:59,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:35:59,862 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:35:59,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:35:59,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:35:59,862 INFO L87 Difference]: Start difference. First operand 1034 states and 3032 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:00,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:00,279 INFO L93 Difference]: Finished difference Result 1341 states and 3805 transitions. [2022-03-01 17:36:00,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:36:00,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:00,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:00,281 INFO L225 Difference]: With dead ends: 1341 [2022-03-01 17:36:00,281 INFO L226 Difference]: Without dead ends: 1341 [2022-03-01 17:36:00,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:36:00,282 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 50 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:00,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 60 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 529 Invalid, 0 Unknown, 129 Unchecked, 0.2s Time] [2022-03-01 17:36:00,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1341 states. [2022-03-01 17:36:00,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1341 to 1032. [2022-03-01 17:36:00,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1031 states have (on average 2.935014548981571) internal successors, (3026), 1031 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:00,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 3026 transitions. [2022-03-01 17:36:00,293 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 3026 transitions. Word has length 17 [2022-03-01 17:36:00,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:00,293 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 3026 transitions. [2022-03-01 17:36:00,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:00,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 3026 transitions. [2022-03-01 17:36:00,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:00,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:00,295 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:00,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (338)] Ended with exit code 0 [2022-03-01 17:36:00,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2022-03-01 17:36:00,495 INFO L402 AbstractCegarLoop]: === Iteration 348 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:00,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash -380898281, now seen corresponding path program 334 times [2022-03-01 17:36:00,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:00,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434503207] [2022-03-01 17:36:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:00,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:00,603 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:00,603 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:00,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434503207] [2022-03-01 17:36:00,603 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434503207] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:00,603 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578216821] [2022-03-01 17:36:00,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:00,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:00,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:00,604 INFO L229 MonitoredProcess]: Starting monitored process 339 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:00,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Waiting until timeout for monitored process [2022-03-01 17:36:00,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:00,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:00,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:00,820 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:00,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:00,822 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:00,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:00,862 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:00,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:00,978 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:36:00,978 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:36:00,980 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:00,998 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:00,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578216821] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:00,998 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:00,998 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:36:00,998 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125894295] [2022-03-01 17:36:00,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:00,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:36:00,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:00,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:36:00,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:36:00,999 INFO L87 Difference]: Start difference. First operand 1032 states and 3026 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:01,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:01,415 INFO L93 Difference]: Finished difference Result 1318 states and 3763 transitions. [2022-03-01 17:36:01,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:36:01,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:01,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:01,417 INFO L225 Difference]: With dead ends: 1318 [2022-03-01 17:36:01,417 INFO L226 Difference]: Without dead ends: 1315 [2022-03-01 17:36:01,417 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:36:01,417 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 49 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 109 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:01,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 54 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 577 Invalid, 0 Unknown, 109 Unchecked, 0.2s Time] [2022-03-01 17:36:01,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-03-01 17:36:01,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1034. [2022-03-01 17:36:01,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1034 states, 1033 states have (on average 2.9341723136495643) internal successors, (3031), 1033 states have internal predecessors, (3031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:01,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 3031 transitions. [2022-03-01 17:36:01,429 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 3031 transitions. Word has length 17 [2022-03-01 17:36:01,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:01,429 INFO L470 AbstractCegarLoop]: Abstraction has 1034 states and 3031 transitions. [2022-03-01 17:36:01,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:01,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 3031 transitions. [2022-03-01 17:36:01,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:01,430 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:01,430 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:01,446 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (339)] Ended with exit code 0 [2022-03-01 17:36:01,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,339 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:01,631 INFO L402 AbstractCegarLoop]: === Iteration 349 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:01,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1695305067, now seen corresponding path program 335 times [2022-03-01 17:36:01,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:01,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021650078] [2022-03-01 17:36:01,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:01,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:01,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:01,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:01,744 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:01,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021650078] [2022-03-01 17:36:01,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021650078] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:01,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652263650] [2022-03-01 17:36:01,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:01,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:01,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:01,745 INFO L229 MonitoredProcess]: Starting monitored process 340 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:01,746 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Waiting until timeout for monitored process [2022-03-01 17:36:01,771 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:36:01,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:01,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:01,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:01,954 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:01,955 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:01,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:01,957 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:01,981 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:01,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:02,124 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:36:02,125 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:36:02,126 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:36:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:02,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652263650] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:02,140 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:02,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:36:02,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525015608] [2022-03-01 17:36:02,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:02,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:36:02,140 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:02,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:36:02,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:02,141 INFO L87 Difference]: Start difference. First operand 1034 states and 3031 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:03,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:03,553 INFO L93 Difference]: Finished difference Result 1440 states and 3990 transitions. [2022-03-01 17:36:03,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:36:03,554 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:03,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:03,556 INFO L225 Difference]: With dead ends: 1440 [2022-03-01 17:36:03,556 INFO L226 Difference]: Without dead ends: 1440 [2022-03-01 17:36:03,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=450, Invalid=2100, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:36:03,556 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 86 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 137 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:03,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 106 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 920 Invalid, 0 Unknown, 137 Unchecked, 0.4s Time] [2022-03-01 17:36:03,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1440 states. [2022-03-01 17:36:03,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1440 to 1046. [2022-03-01 17:36:03,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.9387559808612442) internal successors, (3071), 1045 states have internal predecessors, (3071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:03,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3071 transitions. [2022-03-01 17:36:03,569 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3071 transitions. Word has length 17 [2022-03-01 17:36:03,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:03,569 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3071 transitions. [2022-03-01 17:36:03,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:03,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3071 transitions. [2022-03-01 17:36:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:03,570 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:03,570 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:03,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (340)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:03,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,340 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:03,771 INFO L402 AbstractCegarLoop]: === Iteration 350 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:03,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1679961521, now seen corresponding path program 336 times [2022-03-01 17:36:03,771 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:03,771 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42481635] [2022-03-01 17:36:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:03,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:03,882 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:03,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42481635] [2022-03-01 17:36:03,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42481635] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:03,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413269131] [2022-03-01 17:36:03,882 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:03,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:03,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:03,888 INFO L229 MonitoredProcess]: Starting monitored process 341 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:03,889 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Waiting until timeout for monitored process [2022-03-01 17:36:03,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:36:03,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:03,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:03,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:04,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:04,105 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:04,107 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:04,107 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:04,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:04,277 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:36:04,277 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:36:04,279 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:04,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413269131] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:04,297 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:04,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:36:04,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652880624] [2022-03-01 17:36:04,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:04,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:36:04,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:04,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:36:04,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:04,298 INFO L87 Difference]: Start difference. First operand 1046 states and 3071 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:04,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:04,680 INFO L93 Difference]: Finished difference Result 1333 states and 3809 transitions. [2022-03-01 17:36:04,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:36:04,681 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:04,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:04,682 INFO L225 Difference]: With dead ends: 1333 [2022-03-01 17:36:04,682 INFO L226 Difference]: Without dead ends: 1331 [2022-03-01 17:36:04,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=791, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:36:04,682 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 68 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 44 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:04,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 50 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 522 Invalid, 0 Unknown, 44 Unchecked, 0.2s Time] [2022-03-01 17:36:04,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1331 states. [2022-03-01 17:36:04,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1331 to 1048. [2022-03-01 17:36:04,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.9379178605539638) internal successors, (3076), 1047 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:04,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 3076 transitions. [2022-03-01 17:36:04,694 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 3076 transitions. Word has length 17 [2022-03-01 17:36:04,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:04,695 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 3076 transitions. [2022-03-01 17:36:04,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:04,695 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 3076 transitions. [2022-03-01 17:36:04,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:04,696 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:04,696 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:04,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (341)] Ended with exit code 0 [2022-03-01 17:36:04,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,341 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:04,896 INFO L402 AbstractCegarLoop]: === Iteration 351 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:04,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:04,896 INFO L85 PathProgramCache]: Analyzing trace with hash -1687574669, now seen corresponding path program 337 times [2022-03-01 17:36:04,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:04,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216961896] [2022-03-01 17:36:04,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:04,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:04,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:04,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:04,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:04,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216961896] [2022-03-01 17:36:04,998 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216961896] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:04,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112420647] [2022-03-01 17:36:04,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:04,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:04,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:04,999 INFO L229 MonitoredProcess]: Starting monitored process 342 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:04,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Waiting until timeout for monitored process [2022-03-01 17:36:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:05,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:05,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:05,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:05,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:05,176 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:05,176 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:05,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:05,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:05,375 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:36:05,375 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 21 [2022-03-01 17:36:05,377 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 7 [2022-03-01 17:36:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:05,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112420647] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:05,391 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:05,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:36:05,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98660205] [2022-03-01 17:36:05,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:05,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:36:05,391 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:05,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:36:05,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:05,391 INFO L87 Difference]: Start difference. First operand 1048 states and 3076 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:06,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:06,914 INFO L93 Difference]: Finished difference Result 1511 states and 4086 transitions. [2022-03-01 17:36:06,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:36:06,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:06,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:06,916 INFO L225 Difference]: With dead ends: 1511 [2022-03-01 17:36:06,916 INFO L226 Difference]: Without dead ends: 1511 [2022-03-01 17:36:06,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=419, Invalid=2443, Unknown=0, NotChecked=0, Total=2862 [2022-03-01 17:36:06,916 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 186 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 1195 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:06,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 104 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1195 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:36:06,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1511 states. [2022-03-01 17:36:06,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1511 to 1046. [2022-03-01 17:36:06,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.937799043062201) internal successors, (3070), 1045 states have internal predecessors, (3070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:06,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3070 transitions. [2022-03-01 17:36:06,929 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3070 transitions. Word has length 17 [2022-03-01 17:36:06,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:06,929 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3070 transitions. [2022-03-01 17:36:06,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:06,929 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3070 transitions. [2022-03-01 17:36:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:06,930 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:06,930 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:06,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (342)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:07,130 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,342 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:07,131 INFO L402 AbstractCegarLoop]: === Iteration 352 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:07,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash -885958441, now seen corresponding path program 338 times [2022-03-01 17:36:07,131 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:07,131 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792061056] [2022-03-01 17:36:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:07,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:07,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:07,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:07,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792061056] [2022-03-01 17:36:07,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792061056] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:07,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907186903] [2022-03-01 17:36:07,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:07,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:07,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:07,249 INFO L229 MonitoredProcess]: Starting monitored process 343 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:07,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Waiting until timeout for monitored process [2022-03-01 17:36:07,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:07,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:07,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:07,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:07,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:07,419 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:07,419 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:07,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:07,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:07,637 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:36:07,637 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:36:07,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:07,657 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907186903] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:07,657 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:07,657 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:36:07,657 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450961952] [2022-03-01 17:36:07,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:07,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:36:07,657 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:07,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:36:07,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=396, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:36:07,658 INFO L87 Difference]: Start difference. First operand 1046 states and 3070 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:08,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:08,261 INFO L93 Difference]: Finished difference Result 1360 states and 3847 transitions. [2022-03-01 17:36:08,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:36:08,261 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:08,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:08,263 INFO L225 Difference]: With dead ends: 1360 [2022-03-01 17:36:08,263 INFO L226 Difference]: Without dead ends: 1357 [2022-03-01 17:36:08,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=1051, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:36:08,263 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 146 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 769 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:08,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 56 Invalid, 804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 769 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:36:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1357 states. [2022-03-01 17:36:08,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1357 to 1048. [2022-03-01 17:36:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1047 states have (on average 2.9379178605539638) internal successors, (3076), 1047 states have internal predecessors, (3076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:08,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 3076 transitions. [2022-03-01 17:36:08,275 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 3076 transitions. Word has length 17 [2022-03-01 17:36:08,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:08,275 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 3076 transitions. [2022-03-01 17:36:08,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:08,275 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 3076 transitions. [2022-03-01 17:36:08,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:08,276 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:08,276 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:08,295 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (343)] Ended with exit code 0 [2022-03-01 17:36:08,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,343 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:08,487 INFO L402 AbstractCegarLoop]: === Iteration 353 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:08,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:08,487 INFO L85 PathProgramCache]: Analyzing trace with hash 832385265, now seen corresponding path program 339 times [2022-03-01 17:36:08,487 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:08,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591131613] [2022-03-01 17:36:08,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:08,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:08,605 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:08,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591131613] [2022-03-01 17:36:08,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591131613] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:08,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458529097] [2022-03-01 17:36:08,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:08,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:08,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:08,606 INFO L229 MonitoredProcess]: Starting monitored process 344 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:08,606 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Waiting until timeout for monitored process [2022-03-01 17:36:08,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:36:08,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:08,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:08,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:08,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:08,776 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:08,777 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:08,777 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:08,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:08,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:08,971 INFO L353 Elim1Store]: treesize reduction 7, result has 30.0 percent of original size [2022-03-01 17:36:08,971 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 31 [2022-03-01 17:36:08,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:08,991 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:08,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458529097] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:08,991 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:08,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:36:08,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105152929] [2022-03-01 17:36:08,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:08,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:36:08,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:36:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:08,992 INFO L87 Difference]: Start difference. First operand 1048 states and 3076 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:09,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:09,442 INFO L93 Difference]: Finished difference Result 1349 states and 3831 transitions. [2022-03-01 17:36:09,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:36:09,442 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:09,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:09,444 INFO L225 Difference]: With dead ends: 1349 [2022-03-01 17:36:09,444 INFO L226 Difference]: Without dead ends: 1349 [2022-03-01 17:36:09,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:36:09,444 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 79 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 754 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:09,444 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 108 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 754 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:36:09,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1349 states. [2022-03-01 17:36:09,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1349 to 1046. [2022-03-01 17:36:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1046 states, 1045 states have (on average 2.935885167464115) internal successors, (3068), 1045 states have internal predecessors, (3068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1046 states to 1046 states and 3068 transitions. [2022-03-01 17:36:09,456 INFO L78 Accepts]: Start accepts. Automaton has 1046 states and 3068 transitions. Word has length 17 [2022-03-01 17:36:09,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:09,456 INFO L470 AbstractCegarLoop]: Abstraction has 1046 states and 3068 transitions. [2022-03-01 17:36:09,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 1046 states and 3068 transitions. [2022-03-01 17:36:09,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:09,458 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:09,458 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:09,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (344)] Ended with exit code 0 [2022-03-01 17:36:09,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,344 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:09,658 INFO L402 AbstractCegarLoop]: === Iteration 354 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:09,658 INFO L85 PathProgramCache]: Analyzing trace with hash 111872989, now seen corresponding path program 340 times [2022-03-01 17:36:09,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:09,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413333529] [2022-03-01 17:36:09,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:09,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:09,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:09,758 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:09,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413333529] [2022-03-01 17:36:09,758 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413333529] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:09,758 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443282592] [2022-03-01 17:36:09,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:09,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:09,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:09,759 INFO L229 MonitoredProcess]: Starting monitored process 345 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:09,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Waiting until timeout for monitored process [2022-03-01 17:36:09,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:09,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:09,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:09,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:09,940 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:09,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:09,943 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:09,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:09,968 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:09,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:10,066 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:10,066 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:10,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:10,087 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:10,087 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443282592] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:10,087 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:10,087 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:10,087 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297029543] [2022-03-01 17:36:10,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:10,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:10,087 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:10,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:10,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:10,088 INFO L87 Difference]: Start difference. First operand 1046 states and 3068 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:10,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:10,254 INFO L93 Difference]: Finished difference Result 1152 states and 3319 transitions. [2022-03-01 17:36:10,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:36:10,254 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:10,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:10,256 INFO L225 Difference]: With dead ends: 1152 [2022-03-01 17:36:10,256 INFO L226 Difference]: Without dead ends: 1152 [2022-03-01 17:36:10,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:36:10,256 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 22 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:10,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 24 Invalid, 361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 321 Invalid, 0 Unknown, 37 Unchecked, 0.1s Time] [2022-03-01 17:36:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1152 states. [2022-03-01 17:36:10,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1152 to 1055. [2022-03-01 17:36:10,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1055 states, 1054 states have (on average 2.937381404174573) internal successors, (3096), 1054 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:10,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1055 states to 1055 states and 3096 transitions. [2022-03-01 17:36:10,267 INFO L78 Accepts]: Start accepts. Automaton has 1055 states and 3096 transitions. Word has length 17 [2022-03-01 17:36:10,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:10,267 INFO L470 AbstractCegarLoop]: Abstraction has 1055 states and 3096 transitions. [2022-03-01 17:36:10,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:10,268 INFO L276 IsEmpty]: Start isEmpty. Operand 1055 states and 3096 transitions. [2022-03-01 17:36:10,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:10,269 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:10,269 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:10,284 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (345)] Ended with exit code 0 [2022-03-01 17:36:10,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable353,345 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:10,469 INFO L402 AbstractCegarLoop]: === Iteration 355 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:10,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:10,469 INFO L85 PathProgramCache]: Analyzing trace with hash -2122234505, now seen corresponding path program 341 times [2022-03-01 17:36:10,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:10,469 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458683648] [2022-03-01 17:36:10,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:10,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:10,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:10,574 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:10,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458683648] [2022-03-01 17:36:10,574 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458683648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:10,574 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746201218] [2022-03-01 17:36:10,574 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:10,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:10,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:10,575 INFO L229 MonitoredProcess]: Starting monitored process 346 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:10,576 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Waiting until timeout for monitored process [2022-03-01 17:36:10,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:36:10,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:10,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:10,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:10,757 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:10,757 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:10,760 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:10,760 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:10,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:10,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:10,879 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:10,879 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:10,881 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:10,899 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746201218] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:10,899 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:10,899 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:10,899 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629418232] [2022-03-01 17:36:10,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:10,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:10,899 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:10,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:10,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:10,900 INFO L87 Difference]: Start difference. First operand 1055 states and 3096 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:11,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:11,080 INFO L93 Difference]: Finished difference Result 1168 states and 3358 transitions. [2022-03-01 17:36:11,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:36:11,080 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:11,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:11,082 INFO L225 Difference]: With dead ends: 1168 [2022-03-01 17:36:11,082 INFO L226 Difference]: Without dead ends: 1168 [2022-03-01 17:36:11,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:36:11,082 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 39 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 364 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:11,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 40 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 364 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2022-03-01 17:36:11,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2022-03-01 17:36:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1054. [2022-03-01 17:36:11,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.936372269705603) internal successors, (3092), 1053 states have internal predecessors, (3092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3092 transitions. [2022-03-01 17:36:11,093 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3092 transitions. Word has length 17 [2022-03-01 17:36:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:11,094 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 3092 transitions. [2022-03-01 17:36:11,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:11,094 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3092 transitions. [2022-03-01 17:36:11,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:11,095 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:11,095 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:11,111 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (346)] Ended with exit code 0 [2022-03-01 17:36:11,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2022-03-01 17:36:11,295 INFO L402 AbstractCegarLoop]: === Iteration 356 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:11,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1042755577, now seen corresponding path program 342 times [2022-03-01 17:36:11,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:11,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889087694] [2022-03-01 17:36:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:11,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:11,394 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:11,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889087694] [2022-03-01 17:36:11,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889087694] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:11,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668870883] [2022-03-01 17:36:11,394 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:11,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:11,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:11,396 INFO L229 MonitoredProcess]: Starting monitored process 347 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:11,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Waiting until timeout for monitored process [2022-03-01 17:36:11,420 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:36:11,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:11,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:11,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:11,600 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:11,601 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:11,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:11,603 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:11,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:11,655 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:11,735 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:11,735 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:11,737 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:11,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668870883] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:11,760 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:11,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:11,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885904405] [2022-03-01 17:36:11,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:11,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:11,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:11,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:11,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:11,761 INFO L87 Difference]: Start difference. First operand 1054 states and 3092 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:11,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:11,987 INFO L93 Difference]: Finished difference Result 1142 states and 3296 transitions. [2022-03-01 17:36:11,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:36:11,987 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:11,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:11,989 INFO L225 Difference]: With dead ends: 1142 [2022-03-01 17:36:11,989 INFO L226 Difference]: Without dead ends: 1137 [2022-03-01 17:36:11,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:36:11,989 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 89 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:11,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 392 Invalid, 0 Unknown, 89 Unchecked, 0.1s Time] [2022-03-01 17:36:11,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2022-03-01 17:36:11,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 1054. [2022-03-01 17:36:11,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1054 states, 1053 states have (on average 2.9354226020892686) internal successors, (3091), 1053 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:12,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1054 states to 1054 states and 3091 transitions. [2022-03-01 17:36:12,000 INFO L78 Accepts]: Start accepts. Automaton has 1054 states and 3091 transitions. Word has length 17 [2022-03-01 17:36:12,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:12,000 INFO L470 AbstractCegarLoop]: Abstraction has 1054 states and 3091 transitions. [2022-03-01 17:36:12,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:12,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1054 states and 3091 transitions. [2022-03-01 17:36:12,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:12,001 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:12,001 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:12,017 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (347)] Ended with exit code 0 [2022-03-01 17:36:12,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable355 [2022-03-01 17:36:12,202 INFO L402 AbstractCegarLoop]: === Iteration 357 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:12,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:12,202 INFO L85 PathProgramCache]: Analyzing trace with hash -1049149125, now seen corresponding path program 343 times [2022-03-01 17:36:12,202 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:12,202 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1129237245] [2022-03-01 17:36:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:12,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:12,305 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:12,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1129237245] [2022-03-01 17:36:12,305 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1129237245] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:12,305 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618996762] [2022-03-01 17:36:12,305 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:12,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:12,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:12,306 INFO L229 MonitoredProcess]: Starting monitored process 348 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:12,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Waiting until timeout for monitored process [2022-03-01 17:36:12,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:12,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:12,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:12,492 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:12,493 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:12,495 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:12,495 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:12,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:12,625 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:12,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:12,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:12,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:12,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618996762] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:12,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:12,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:36:12,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201252054] [2022-03-01 17:36:12,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:12,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:12,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:12,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:12,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:12,646 INFO L87 Difference]: Start difference. First operand 1054 states and 3091 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:12,932 INFO L93 Difference]: Finished difference Result 1171 states and 3354 transitions. [2022-03-01 17:36:12,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:36:12,932 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:12,934 INFO L225 Difference]: With dead ends: 1171 [2022-03-01 17:36:12,934 INFO L226 Difference]: Without dead ends: 1168 [2022-03-01 17:36:12,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=77, Invalid=475, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:36:12,934 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:12,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 480 Invalid, 0 Unknown, 96 Unchecked, 0.2s Time] [2022-03-01 17:36:12,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168 states. [2022-03-01 17:36:12,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168 to 1058. [2022-03-01 17:36:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1058 states, 1057 states have (on average 2.935666982024598) internal successors, (3103), 1057 states have internal predecessors, (3103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:12,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 3103 transitions. [2022-03-01 17:36:12,945 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 3103 transitions. Word has length 17 [2022-03-01 17:36:12,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:12,945 INFO L470 AbstractCegarLoop]: Abstraction has 1058 states and 3103 transitions. [2022-03-01 17:36:12,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:12,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 3103 transitions. [2022-03-01 17:36:12,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:12,946 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:12,946 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:12,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (348)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:13,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 348 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2022-03-01 17:36:13,147 INFO L402 AbstractCegarLoop]: === Iteration 358 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:13,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash 679898209, now seen corresponding path program 344 times [2022-03-01 17:36:13,147 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:13,147 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911361491] [2022-03-01 17:36:13,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:13,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:13,250 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:13,250 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:13,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911361491] [2022-03-01 17:36:13,250 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911361491] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:13,250 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114302396] [2022-03-01 17:36:13,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:13,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:13,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:13,251 INFO L229 MonitoredProcess]: Starting monitored process 349 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:13,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Waiting until timeout for monitored process [2022-03-01 17:36:13,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:13,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:13,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:13,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:13,438 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:13,439 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:13,441 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:13,441 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:13,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:13,577 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:13,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:13,579 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:13,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114302396] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:13,598 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:13,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:36:13,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42487800] [2022-03-01 17:36:13,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:13,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:13,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:13,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:13,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:13,598 INFO L87 Difference]: Start difference. First operand 1058 states and 3103 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:13,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:13,937 INFO L93 Difference]: Finished difference Result 1179 states and 3366 transitions. [2022-03-01 17:36:13,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:36:13,938 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:13,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:13,939 INFO L225 Difference]: With dead ends: 1179 [2022-03-01 17:36:13,939 INFO L226 Difference]: Without dead ends: 1179 [2022-03-01 17:36:13,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:36:13,939 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 31 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 527 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 111 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:13,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 46 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 527 Invalid, 0 Unknown, 111 Unchecked, 0.2s Time] [2022-03-01 17:36:13,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1179 states. [2022-03-01 17:36:13,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1179 to 1052. [2022-03-01 17:36:13,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 2.934348239771646) internal successors, (3084), 1051 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:13,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3084 transitions. [2022-03-01 17:36:13,950 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3084 transitions. Word has length 17 [2022-03-01 17:36:13,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:13,951 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 3084 transitions. [2022-03-01 17:36:13,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:13,951 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3084 transitions. [2022-03-01 17:36:13,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:13,952 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:13,952 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:13,967 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (349)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:14,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,349 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:14,152 INFO L402 AbstractCegarLoop]: === Iteration 359 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:14,152 INFO L85 PathProgramCache]: Analyzing trace with hash 504899999, now seen corresponding path program 345 times [2022-03-01 17:36:14,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:14,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302505266] [2022-03-01 17:36:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:14,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:14,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:14,259 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:14,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302505266] [2022-03-01 17:36:14,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302505266] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:14,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316843254] [2022-03-01 17:36:14,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:14,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:14,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:14,261 INFO L229 MonitoredProcess]: Starting monitored process 350 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:14,261 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Waiting until timeout for monitored process [2022-03-01 17:36:14,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:36:14,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:14,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:14,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:14,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:14,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:14,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:14,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:14,520 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:14,617 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:14,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:14,619 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:14,642 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:14,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316843254] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:14,642 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:14,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:36:14,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300243917] [2022-03-01 17:36:14,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:14,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:14,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:14,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:14,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:14,642 INFO L87 Difference]: Start difference. First operand 1052 states and 3084 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:14,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:14,888 INFO L93 Difference]: Finished difference Result 1137 states and 3284 transitions. [2022-03-01 17:36:14,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:36:14,888 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:14,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:14,889 INFO L225 Difference]: With dead ends: 1137 [2022-03-01 17:36:14,889 INFO L226 Difference]: Without dead ends: 1131 [2022-03-01 17:36:14,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:36:14,890 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:14,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 28 Invalid, 535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 478 Invalid, 0 Unknown, 52 Unchecked, 0.2s Time] [2022-03-01 17:36:14,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-03-01 17:36:14,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 1052. [2022-03-01 17:36:14,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 2.9324452901998095) internal successors, (3082), 1051 states have internal predecessors, (3082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 3082 transitions. [2022-03-01 17:36:14,901 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 3082 transitions. Word has length 17 [2022-03-01 17:36:14,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:14,901 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 3082 transitions. [2022-03-01 17:36:14,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:14,901 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 3082 transitions. [2022-03-01 17:36:14,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:14,902 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:14,902 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:14,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (350)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:15,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable358,350 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:15,102 INFO L402 AbstractCegarLoop]: === Iteration 360 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:15,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash -809506787, now seen corresponding path program 346 times [2022-03-01 17:36:15,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:15,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003985102] [2022-03-01 17:36:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:15,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:15,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:15,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:15,214 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:15,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003985102] [2022-03-01 17:36:15,214 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003985102] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:15,214 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475290342] [2022-03-01 17:36:15,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:15,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:15,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:15,215 INFO L229 MonitoredProcess]: Starting monitored process 351 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:15,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Waiting until timeout for monitored process [2022-03-01 17:36:15,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:15,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:15,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:15,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:15,414 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:15,415 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:15,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:15,417 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:15,441 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:15,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:15,564 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:15,564 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:15,565 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:15,584 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475290342] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:15,584 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:15,584 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:36:15,584 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162566976] [2022-03-01 17:36:15,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:15,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:36:15,584 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:15,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:36:15,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:36:15,584 INFO L87 Difference]: Start difference. First operand 1052 states and 3082 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:16,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:16,666 INFO L93 Difference]: Finished difference Result 1292 states and 3579 transitions. [2022-03-01 17:36:16,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-03-01 17:36:16,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:16,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:16,668 INFO L225 Difference]: With dead ends: 1292 [2022-03-01 17:36:16,668 INFO L226 Difference]: Without dead ends: 1292 [2022-03-01 17:36:16,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=336, Invalid=1734, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:36:16,669 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 89 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 856 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 45 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:16,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 106 Invalid, 920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 856 Invalid, 0 Unknown, 45 Unchecked, 0.3s Time] [2022-03-01 17:36:16,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1292 states. [2022-03-01 17:36:16,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1292 to 1067. [2022-03-01 17:36:16,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 1066 states have (on average 2.9380863039399623) internal successors, (3132), 1066 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:16,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 3132 transitions. [2022-03-01 17:36:16,690 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 3132 transitions. Word has length 17 [2022-03-01 17:36:16,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:16,690 INFO L470 AbstractCegarLoop]: Abstraction has 1067 states and 3132 transitions. [2022-03-01 17:36:16,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:16,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 3132 transitions. [2022-03-01 17:36:16,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:16,691 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:16,691 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:16,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (351)] Ended with exit code 0 [2022-03-01 17:36:16,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,351 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:16,891 INFO L402 AbstractCegarLoop]: === Iteration 361 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:16,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:16,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1729207495, now seen corresponding path program 347 times [2022-03-01 17:36:16,892 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:16,892 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981537589] [2022-03-01 17:36:16,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:16,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:16,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:16,997 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:16,997 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:16,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981537589] [2022-03-01 17:36:16,997 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981537589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:16,997 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646978526] [2022-03-01 17:36:16,997 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:16,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:16,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:16,998 INFO L229 MonitoredProcess]: Starting monitored process 352 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:16,999 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Waiting until timeout for monitored process [2022-03-01 17:36:17,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:36:17,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:17,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:17,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:17,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:17,202 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:17,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:17,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:17,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:17,354 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:17,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:17,356 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:17,379 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:17,379 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646978526] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:17,379 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:17,379 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:36:17,379 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711812934] [2022-03-01 17:36:17,379 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:17,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:36:17,379 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:17,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:36:17,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:36:17,380 INFO L87 Difference]: Start difference. First operand 1067 states and 3132 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:17,678 INFO L93 Difference]: Finished difference Result 1173 states and 3370 transitions. [2022-03-01 17:36:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:36:17,679 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:17,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:17,680 INFO L225 Difference]: With dead ends: 1173 [2022-03-01 17:36:17,680 INFO L226 Difference]: Without dead ends: 1169 [2022-03-01 17:36:17,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=95, Invalid=661, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:36:17,681 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 42 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:17,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 44 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 433 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-03-01 17:36:17,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2022-03-01 17:36:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 1073. [2022-03-01 17:36:17,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 2.9375) internal successors, (3149), 1072 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:17,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3149 transitions. [2022-03-01 17:36:17,692 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3149 transitions. Word has length 17 [2022-03-01 17:36:17,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:17,692 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3149 transitions. [2022-03-01 17:36:17,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:17,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3149 transitions. [2022-03-01 17:36:17,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:17,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:17,693 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:17,709 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (352)] Ended with exit code 0 [2022-03-01 17:36:17,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,352 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:17,894 INFO L402 AbstractCegarLoop]: === Iteration 362 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:17,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:17,894 INFO L85 PathProgramCache]: Analyzing trace with hash -801776389, now seen corresponding path program 348 times [2022-03-01 17:36:17,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:17,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612492925] [2022-03-01 17:36:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:17,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:17,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:18,003 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:18,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612492925] [2022-03-01 17:36:18,003 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612492925] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:18,003 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622835416] [2022-03-01 17:36:18,003 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:18,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:18,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:18,005 INFO L229 MonitoredProcess]: Starting monitored process 353 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:18,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Waiting until timeout for monitored process [2022-03-01 17:36:18,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:36:18,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:18,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:18,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:18,166 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:18,167 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:18,168 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:18,169 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:18,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:18,354 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:18,354 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:18,355 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:18,374 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:18,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622835416] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:18,374 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:18,374 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:36:18,374 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314136942] [2022-03-01 17:36:18,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:18,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:36:18,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:18,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:36:18,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:36:18,374 INFO L87 Difference]: Start difference. First operand 1073 states and 3149 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:19,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:19,619 INFO L93 Difference]: Finished difference Result 1347 states and 3646 transitions. [2022-03-01 17:36:19,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:36:19,620 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:19,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:19,621 INFO L225 Difference]: With dead ends: 1347 [2022-03-01 17:36:19,621 INFO L226 Difference]: Without dead ends: 1347 [2022-03-01 17:36:19,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=311, Invalid=1945, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:36:19,622 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 139 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:19,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 114 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-01 17:36:19,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1347 states. [2022-03-01 17:36:19,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1347 to 1060. [2022-03-01 17:36:19,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1060 states, 1059 states have (on average 2.9329556185080263) internal successors, (3106), 1059 states have internal predecessors, (3106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:19,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1060 states to 1060 states and 3106 transitions. [2022-03-01 17:36:19,634 INFO L78 Accepts]: Start accepts. Automaton has 1060 states and 3106 transitions. Word has length 17 [2022-03-01 17:36:19,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:19,634 INFO L470 AbstractCegarLoop]: Abstraction has 1060 states and 3106 transitions. [2022-03-01 17:36:19,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:19,634 INFO L276 IsEmpty]: Start isEmpty. Operand 1060 states and 3106 transitions. [2022-03-01 17:36:19,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:19,635 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:19,635 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:19,650 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (353)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:19,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,353 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:19,835 INFO L402 AbstractCegarLoop]: === Iteration 363 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:19,835 INFO L85 PathProgramCache]: Analyzing trace with hash -160161, now seen corresponding path program 349 times [2022-03-01 17:36:19,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:19,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662679883] [2022-03-01 17:36:19,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:19,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:19,943 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:19,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662679883] [2022-03-01 17:36:19,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662679883] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:19,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45624682] [2022-03-01 17:36:19,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:19,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:19,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:19,945 INFO L229 MonitoredProcess]: Starting monitored process 354 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:19,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Waiting until timeout for monitored process [2022-03-01 17:36:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:19,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:19,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:20,103 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:20,104 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:20,105 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:20,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:20,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:20,304 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:20,304 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:20,306 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:20,329 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45624682] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:20,329 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:20,329 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:36:20,329 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789559403] [2022-03-01 17:36:20,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:20,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:36:20,330 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:20,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:36:20,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:20,330 INFO L87 Difference]: Start difference. First operand 1060 states and 3106 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:20,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:20,785 INFO L93 Difference]: Finished difference Result 1181 states and 3361 transitions. [2022-03-01 17:36:20,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:36:20,785 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:20,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:20,787 INFO L225 Difference]: With dead ends: 1181 [2022-03-01 17:36:20,787 INFO L226 Difference]: Without dead ends: 1177 [2022-03-01 17:36:20,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=755, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:36:20,787 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 79 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 814 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:20,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 56 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 814 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:36:20,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1177 states. [2022-03-01 17:36:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1177 to 1063. [2022-03-01 17:36:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 2.933145009416196) internal successors, (3115), 1062 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:20,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 3115 transitions. [2022-03-01 17:36:20,806 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 3115 transitions. Word has length 17 [2022-03-01 17:36:20,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:20,806 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 3115 transitions. [2022-03-01 17:36:20,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 3115 transitions. [2022-03-01 17:36:20,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:20,807 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:20,807 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:20,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (354)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:21,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,354 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:21,008 INFO L402 AbstractCegarLoop]: === Iteration 364 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:21,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:21,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1718183545, now seen corresponding path program 350 times [2022-03-01 17:36:21,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:21,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641355900] [2022-03-01 17:36:21,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:21,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:21,117 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:21,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641355900] [2022-03-01 17:36:21,117 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641355900] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:21,117 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60145958] [2022-03-01 17:36:21,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:21,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:21,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:21,118 INFO L229 MonitoredProcess]: Starting monitored process 355 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:21,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Waiting until timeout for monitored process [2022-03-01 17:36:21,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:21,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:21,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:21,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:21,275 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:21,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:21,278 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:21,278 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:21,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:21,454 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:21,454 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:21,456 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:21,479 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:21,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60145958] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:21,479 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:21,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:36:21,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949490513] [2022-03-01 17:36:21,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:21,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:36:21,480 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:21,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:36:21,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:36:21,480 INFO L87 Difference]: Start difference. First operand 1063 states and 3115 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:21,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:21,794 INFO L93 Difference]: Finished difference Result 1178 states and 3358 transitions. [2022-03-01 17:36:21,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:36:21,794 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:21,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:21,796 INFO L225 Difference]: With dead ends: 1178 [2022-03-01 17:36:21,796 INFO L226 Difference]: Without dead ends: 1178 [2022-03-01 17:36:21,796 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:36:21,796 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 57 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:21,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 98 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 603 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:36:21,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1178 states. [2022-03-01 17:36:21,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1178 to 1057. [2022-03-01 17:36:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.9318181818181817) internal successors, (3096), 1056 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 3096 transitions. [2022-03-01 17:36:21,808 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 3096 transitions. Word has length 17 [2022-03-01 17:36:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:21,808 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 3096 transitions. [2022-03-01 17:36:21,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 3096 transitions. [2022-03-01 17:36:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:21,809 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:21,809 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:21,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (355)] Ended with exit code 0 [2022-03-01 17:36:22,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,355 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:22,010 INFO L402 AbstractCegarLoop]: === Iteration 365 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:22,010 INFO L85 PathProgramCache]: Analyzing trace with hash -2143240713, now seen corresponding path program 351 times [2022-03-01 17:36:22,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:22,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273856275] [2022-03-01 17:36:22,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:22,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:22,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:22,107 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:22,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273856275] [2022-03-01 17:36:22,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273856275] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:22,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089804760] [2022-03-01 17:36:22,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:22,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:22,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:22,108 INFO L229 MonitoredProcess]: Starting monitored process 356 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:22,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Waiting until timeout for monitored process [2022-03-01 17:36:22,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:36:22,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:22,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:22,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:22,285 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:22,286 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:22,288 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:22,288 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:22,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:22,399 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:22,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:22,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:22,423 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:22,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089804760] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:22,423 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:22,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:22,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704879097] [2022-03-01 17:36:22,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:22,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:22,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:22,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:22,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:22,424 INFO L87 Difference]: Start difference. First operand 1057 states and 3096 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:22,717 INFO L93 Difference]: Finished difference Result 1174 states and 3360 transitions. [2022-03-01 17:36:22,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:36:22,717 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:22,718 INFO L225 Difference]: With dead ends: 1174 [2022-03-01 17:36:22,718 INFO L226 Difference]: Without dead ends: 1174 [2022-03-01 17:36:22,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:36:22,719 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 125 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:22,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 28 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 577 Invalid, 0 Unknown, 125 Unchecked, 0.2s Time] [2022-03-01 17:36:22,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2022-03-01 17:36:22,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1059. [2022-03-01 17:36:22,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 2.931947069943289) internal successors, (3102), 1058 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:22,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3102 transitions. [2022-03-01 17:36:22,730 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3102 transitions. Word has length 17 [2022-03-01 17:36:22,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:22,730 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 3102 transitions. [2022-03-01 17:36:22,730 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:22,730 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3102 transitions. [2022-03-01 17:36:22,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:22,731 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:22,731 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:22,747 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (356)] Ended with exit code 0 [2022-03-01 17:36:22,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2022-03-01 17:36:22,932 INFO L402 AbstractCegarLoop]: === Iteration 366 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:22,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:22,932 INFO L85 PathProgramCache]: Analyzing trace with hash -589191589, now seen corresponding path program 352 times [2022-03-01 17:36:22,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:22,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121994743] [2022-03-01 17:36:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:22,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:23,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:23,027 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:23,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121994743] [2022-03-01 17:36:23,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121994743] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:23,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513413470] [2022-03-01 17:36:23,027 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:23,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:23,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:23,028 INFO L229 MonitoredProcess]: Starting monitored process 357 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:23,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Waiting until timeout for monitored process [2022-03-01 17:36:23,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:23,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:23,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:23,218 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:23,218 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:23,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:23,220 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:23,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:23,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:23,339 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:23,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:23,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:23,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:23,368 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513413470] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:23,368 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:23,368 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:23,369 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221231190] [2022-03-01 17:36:23,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:23,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:23,369 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:23,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:23,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:23,369 INFO L87 Difference]: Start difference. First operand 1059 states and 3102 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:23,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:23,685 INFO L93 Difference]: Finished difference Result 1149 states and 3307 transitions. [2022-03-01 17:36:23,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:36:23,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:23,687 INFO L225 Difference]: With dead ends: 1149 [2022-03-01 17:36:23,687 INFO L226 Difference]: Without dead ends: 1143 [2022-03-01 17:36:23,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=101, Invalid=655, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:36:23,687 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 25 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:23,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 22 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 453 Invalid, 0 Unknown, 12 Unchecked, 0.2s Time] [2022-03-01 17:36:23,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2022-03-01 17:36:23,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 1059. [2022-03-01 17:36:23,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1059 states, 1058 states have (on average 2.929111531190926) internal successors, (3099), 1058 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:23,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1059 states to 1059 states and 3099 transitions. [2022-03-01 17:36:23,698 INFO L78 Accepts]: Start accepts. Automaton has 1059 states and 3099 transitions. Word has length 17 [2022-03-01 17:36:23,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:23,698 INFO L470 AbstractCegarLoop]: Abstraction has 1059 states and 3099 transitions. [2022-03-01 17:36:23,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:23,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1059 states and 3099 transitions. [2022-03-01 17:36:23,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:23,700 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:23,700 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:23,715 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (357)] Ended with exit code 0 [2022-03-01 17:36:23,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2022-03-01 17:36:23,900 INFO L402 AbstractCegarLoop]: === Iteration 367 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:23,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:23,900 INFO L85 PathProgramCache]: Analyzing trace with hash -288346791, now seen corresponding path program 353 times [2022-03-01 17:36:23,900 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:23,900 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323480522] [2022-03-01 17:36:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:23,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:23,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:23,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:23,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323480522] [2022-03-01 17:36:23,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323480522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:23,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612728505] [2022-03-01 17:36:23,995 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:23,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:23,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:23,996 INFO L229 MonitoredProcess]: Starting monitored process 358 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:23,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Waiting until timeout for monitored process [2022-03-01 17:36:24,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:36:24,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:24,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:24,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:24,138 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:24,138 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:24,140 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:24,140 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:24,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:24,300 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:24,300 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:24,302 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:24,324 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612728505] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:24,324 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:24,324 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:36:24,324 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632993662] [2022-03-01 17:36:24,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:24,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:24,325 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:24,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:24,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:24,325 INFO L87 Difference]: Start difference. First operand 1059 states and 3099 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:25,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:25,369 INFO L93 Difference]: Finished difference Result 1237 states and 3473 transitions. [2022-03-01 17:36:25,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:36:25,369 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:25,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:25,371 INFO L225 Difference]: With dead ends: 1237 [2022-03-01 17:36:25,371 INFO L226 Difference]: Without dead ends: 1233 [2022-03-01 17:36:25,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=248, Invalid=1732, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:36:25,371 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 75 mSDsluCounter, 294 mSDsCounter, 0 mSdLazyCounter, 1180 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:25,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 94 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1180 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:36:25,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-03-01 17:36:25,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1075. [2022-03-01 17:36:25,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1075 states, 1074 states have (on average 2.936685288640596) internal successors, (3154), 1074 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:25,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1075 states to 1075 states and 3154 transitions. [2022-03-01 17:36:25,383 INFO L78 Accepts]: Start accepts. Automaton has 1075 states and 3154 transitions. Word has length 17 [2022-03-01 17:36:25,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:25,383 INFO L470 AbstractCegarLoop]: Abstraction has 1075 states and 3154 transitions. [2022-03-01 17:36:25,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:25,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1075 states and 3154 transitions. [2022-03-01 17:36:25,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:25,384 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:25,384 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:25,400 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (358)] Ended with exit code 0 [2022-03-01 17:36:25,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 358 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2022-03-01 17:36:25,585 INFO L402 AbstractCegarLoop]: === Iteration 368 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:25,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:25,585 INFO L85 PathProgramCache]: Analyzing trace with hash -830512995, now seen corresponding path program 354 times [2022-03-01 17:36:25,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:25,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599755317] [2022-03-01 17:36:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:25,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:25,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:25,693 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:25,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599755317] [2022-03-01 17:36:25,693 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599755317] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:25,693 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219315917] [2022-03-01 17:36:25,693 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:25,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:25,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:25,694 INFO L229 MonitoredProcess]: Starting monitored process 359 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:25,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Waiting until timeout for monitored process [2022-03-01 17:36:25,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:36:25,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:25,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:25,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:25,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:25,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:25,860 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:25,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:25,884 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:25,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:25,964 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:36:25,964 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:36:25,965 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:36:25,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:25,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219315917] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:25,992 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:25,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:25,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635601539] [2022-03-01 17:36:25,992 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:25,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:25,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:25,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:25,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:25,992 INFO L87 Difference]: Start difference. First operand 1075 states and 3154 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:26,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:26,543 INFO L93 Difference]: Finished difference Result 1337 states and 3710 transitions. [2022-03-01 17:36:26,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:36:26,543 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:26,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:26,545 INFO L225 Difference]: With dead ends: 1337 [2022-03-01 17:36:26,545 INFO L226 Difference]: Without dead ends: 1337 [2022-03-01 17:36:26,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:36:26,545 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 75 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 869 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:26,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 116 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 869 Invalid, 0 Unknown, 66 Unchecked, 0.3s Time] [2022-03-01 17:36:26,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2022-03-01 17:36:26,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1112. [2022-03-01 17:36:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.952295229522952) internal successors, (3280), 1111 states have internal predecessors, (3280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3280 transitions. [2022-03-01 17:36:26,558 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3280 transitions. Word has length 17 [2022-03-01 17:36:26,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:26,558 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3280 transitions. [2022-03-01 17:36:26,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:26,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3280 transitions. [2022-03-01 17:36:26,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:26,559 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:26,559 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:26,575 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (359)] Ended with exit code 0 [2022-03-01 17:36:26,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable367,359 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:26,760 INFO L402 AbstractCegarLoop]: === Iteration 369 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:26,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:26,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1750213703, now seen corresponding path program 355 times [2022-03-01 17:36:26,760 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:26,760 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688847829] [2022-03-01 17:36:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:26,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:26,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:26,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:26,851 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:26,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688847829] [2022-03-01 17:36:26,851 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688847829] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:26,851 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846342801] [2022-03-01 17:36:26,851 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:26,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:26,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:26,852 INFO L229 MonitoredProcess]: Starting monitored process 360 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:26,852 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Waiting until timeout for monitored process [2022-03-01 17:36:26,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:26,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:26,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:27,022 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:27,022 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:27,024 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:27,024 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:27,064 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:27,133 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:36:27,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:36:27,136 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:27,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:27,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846342801] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:27,164 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:27,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:27,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196072968] [2022-03-01 17:36:27,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:27,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:27,165 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:27,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:27,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=261, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:27,165 INFO L87 Difference]: Start difference. First operand 1112 states and 3280 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:27,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:27,678 INFO L93 Difference]: Finished difference Result 1256 states and 3560 transitions. [2022-03-01 17:36:27,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-03-01 17:36:27,678 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:27,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:27,680 INFO L225 Difference]: With dead ends: 1256 [2022-03-01 17:36:27,680 INFO L226 Difference]: Without dead ends: 1252 [2022-03-01 17:36:27,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:36:27,680 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 55 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:27,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 74 Invalid, 761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 680 Invalid, 0 Unknown, 67 Unchecked, 0.3s Time] [2022-03-01 17:36:27,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1252 states. [2022-03-01 17:36:27,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1252 to 1112. [2022-03-01 17:36:27,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.9441944194419443) internal successors, (3271), 1111 states have internal predecessors, (3271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:27,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3271 transitions. [2022-03-01 17:36:27,692 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3271 transitions. Word has length 17 [2022-03-01 17:36:27,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:27,692 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3271 transitions. [2022-03-01 17:36:27,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:27,692 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3271 transitions. [2022-03-01 17:36:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:27,693 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:27,693 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:27,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (360)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:27,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,360 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:27,893 INFO L402 AbstractCegarLoop]: === Iteration 370 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:27,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:27,894 INFO L85 PathProgramCache]: Analyzing trace with hash 784738589, now seen corresponding path program 356 times [2022-03-01 17:36:27,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:27,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973135397] [2022-03-01 17:36:27,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:27,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:27,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:27,986 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:27,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973135397] [2022-03-01 17:36:27,986 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973135397] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:27,986 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689729637] [2022-03-01 17:36:27,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:27,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:27,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:27,987 INFO L229 MonitoredProcess]: Starting monitored process 361 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:27,987 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Waiting until timeout for monitored process [2022-03-01 17:36:28,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:28,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:28,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:28,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:28,110 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:28,111 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:28,112 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:28,113 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:28,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:28,255 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:36:28,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:36:28,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:36:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:28,280 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689729637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:28,281 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:28,281 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:28,281 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656806122] [2022-03-01 17:36:28,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:28,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:28,281 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:28,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:28,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:28,281 INFO L87 Difference]: Start difference. First operand 1112 states and 3271 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:29,378 INFO L93 Difference]: Finished difference Result 1381 states and 3768 transitions. [2022-03-01 17:36:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-01 17:36:29,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:29,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:29,380 INFO L225 Difference]: With dead ends: 1381 [2022-03-01 17:36:29,380 INFO L226 Difference]: Without dead ends: 1376 [2022-03-01 17:36:29,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=315, Invalid=2441, Unknown=0, NotChecked=0, Total=2756 [2022-03-01 17:36:29,380 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 439 mSDsCounter, 0 mSdLazyCounter, 1154 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:29,380 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 206 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1154 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:36:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2022-03-01 17:36:29,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1112. [2022-03-01 17:36:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 2.936993699369937) internal successors, (3263), 1111 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:29,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 3263 transitions. [2022-03-01 17:36:29,393 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 3263 transitions. Word has length 17 [2022-03-01 17:36:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:29,393 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 3263 transitions. [2022-03-01 17:36:29,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 3263 transitions. [2022-03-01 17:36:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:29,394 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:29,394 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:29,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (361)] Ended with exit code 0 [2022-03-01 17:36:29,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable369 [2022-03-01 17:36:29,595 INFO L402 AbstractCegarLoop]: === Iteration 371 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:29,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:29,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1982779703, now seen corresponding path program 357 times [2022-03-01 17:36:29,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:29,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423055785] [2022-03-01 17:36:29,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:29,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:29,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:29,690 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:29,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423055785] [2022-03-01 17:36:29,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423055785] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:29,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690561155] [2022-03-01 17:36:29,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:29,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:29,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:29,691 INFO L229 MonitoredProcess]: Starting monitored process 362 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:29,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Waiting until timeout for monitored process [2022-03-01 17:36:29,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:36:29,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:29,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:29,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:29,816 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:29,817 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:29,818 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:29,819 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:29,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:29,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:29,956 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:36:29,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:36:29,958 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:29,987 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690561155] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:29,987 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:29,987 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:29,987 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379471448] [2022-03-01 17:36:29,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:29,987 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:29,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:29,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:29,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:29,987 INFO L87 Difference]: Start difference. First operand 1112 states and 3263 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:30,534 INFO L93 Difference]: Finished difference Result 1384 states and 3871 transitions. [2022-03-01 17:36:30,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:36:30,535 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:30,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:30,536 INFO L225 Difference]: With dead ends: 1384 [2022-03-01 17:36:30,536 INFO L226 Difference]: Without dead ends: 1384 [2022-03-01 17:36:30,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:36:30,536 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 90 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:30,537 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 100 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:36:30,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2022-03-01 17:36:30,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1162. [2022-03-01 17:36:30,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 2.9681309216192937) internal successors, (3446), 1161 states have internal predecessors, (3446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:30,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 3446 transitions. [2022-03-01 17:36:30,550 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 3446 transitions. Word has length 17 [2022-03-01 17:36:30,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:30,550 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 3446 transitions. [2022-03-01 17:36:30,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:30,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 3446 transitions. [2022-03-01 17:36:30,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:30,551 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:30,551 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:30,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (362)] Ended with exit code 0 [2022-03-01 17:36:30,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable370,362 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:30,751 INFO L402 AbstractCegarLoop]: === Iteration 372 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:30,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:30,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1510571365, now seen corresponding path program 358 times [2022-03-01 17:36:30,752 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:30,752 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881290704] [2022-03-01 17:36:30,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:30,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:30,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:30,843 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:30,843 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:30,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881290704] [2022-03-01 17:36:30,843 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881290704] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:30,843 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41880013] [2022-03-01 17:36:30,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:30,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:30,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:30,844 INFO L229 MonitoredProcess]: Starting monitored process 363 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:30,845 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Waiting until timeout for monitored process [2022-03-01 17:36:30,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:30,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:30,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:30,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:30,970 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:30,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:30,972 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:30,972 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:31,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:31,121 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:36:31,121 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:36:31,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:36:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:31,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41880013] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:31,147 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:31,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:31,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195336839] [2022-03-01 17:36:31,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:31,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:31,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:31,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:31,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:31,148 INFO L87 Difference]: Start difference. First operand 1162 states and 3446 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:31,962 INFO L93 Difference]: Finished difference Result 1447 states and 4017 transitions. [2022-03-01 17:36:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:36:31,963 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:31,964 INFO L225 Difference]: With dead ends: 1447 [2022-03-01 17:36:31,965 INFO L226 Difference]: Without dead ends: 1441 [2022-03-01 17:36:31,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=251, Invalid=2199, Unknown=0, NotChecked=0, Total=2450 [2022-03-01 17:36:31,965 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 119 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:31,965 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 106 Invalid, 964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:36:31,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2022-03-01 17:36:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 1182. [2022-03-01 17:36:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.968670618120237) internal successors, (3506), 1181 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:31,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3506 transitions. [2022-03-01 17:36:31,978 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3506 transitions. Word has length 17 [2022-03-01 17:36:31,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:31,978 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 3506 transitions. [2022-03-01 17:36:31,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:31,979 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3506 transitions. [2022-03-01 17:36:31,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:31,980 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:31,980 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:31,996 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (363)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:32,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable371,363 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:32,180 INFO L402 AbstractCegarLoop]: === Iteration 373 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:32,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:32,180 INFO L85 PathProgramCache]: Analyzing trace with hash 207772341, now seen corresponding path program 359 times [2022-03-01 17:36:32,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:32,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223543073] [2022-03-01 17:36:32,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:32,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:32,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:32,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:32,271 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:32,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223543073] [2022-03-01 17:36:32,271 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223543073] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:32,271 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006239693] [2022-03-01 17:36:32,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:32,271 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:32,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:32,272 INFO L229 MonitoredProcess]: Starting monitored process 364 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:32,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Waiting until timeout for monitored process [2022-03-01 17:36:32,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:36:32,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:32,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:32,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:32,399 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:32,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:32,401 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:32,401 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:32,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:32,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:32,538 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:36:32,539 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:36:32,540 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:36:32,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:32,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006239693] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:32,564 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:32,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:32,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684529005] [2022-03-01 17:36:32,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:32,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:32,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:32,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:32,565 INFO L87 Difference]: Start difference. First operand 1182 states and 3506 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:33,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:33,133 INFO L93 Difference]: Finished difference Result 1433 states and 3982 transitions. [2022-03-01 17:36:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:36:33,133 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:33,135 INFO L225 Difference]: With dead ends: 1433 [2022-03-01 17:36:33,135 INFO L226 Difference]: Without dead ends: 1433 [2022-03-01 17:36:33,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:36:33,135 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 86 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:33,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 132 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 963 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:36:33,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1433 states. [2022-03-01 17:36:33,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1433 to 1165. [2022-03-01 17:36:33,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1165 states, 1164 states have (on average 2.957044673539519) internal successors, (3442), 1164 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:33,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1165 states to 1165 states and 3442 transitions. [2022-03-01 17:36:33,155 INFO L78 Accepts]: Start accepts. Automaton has 1165 states and 3442 transitions. Word has length 17 [2022-03-01 17:36:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:33,155 INFO L470 AbstractCegarLoop]: Abstraction has 1165 states and 3442 transitions. [2022-03-01 17:36:33,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:33,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1165 states and 3442 transitions. [2022-03-01 17:36:33,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:33,157 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:33,157 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:33,173 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (364)] Ended with exit code 0 [2022-03-01 17:36:33,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,364 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:33,357 INFO L402 AbstractCegarLoop]: === Iteration 374 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:33,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:33,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1502840967, now seen corresponding path program 360 times [2022-03-01 17:36:33,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:33,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209219850] [2022-03-01 17:36:33,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:33,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:33,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:33,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:33,478 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:33,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209219850] [2022-03-01 17:36:33,478 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209219850] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:33,478 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670939980] [2022-03-01 17:36:33,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:33,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:33,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:33,479 INFO L229 MonitoredProcess]: Starting monitored process 365 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:33,480 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Waiting until timeout for monitored process [2022-03-01 17:36:33,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-03-01 17:36:33,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:33,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:33,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:33,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:33,629 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:33,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:33,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:36:33,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:33,635 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:36:33,663 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:33,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:33,739 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:36:33,739 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:36:33,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:36:33,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:33,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670939980] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:33,765 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:33,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 18 [2022-03-01 17:36:33,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083358492] [2022-03-01 17:36:33,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:33,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:33,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:33,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:33,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:33,766 INFO L87 Difference]: Start difference. First operand 1165 states and 3442 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:34,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:34,268 INFO L93 Difference]: Finished difference Result 1385 states and 3876 transitions. [2022-03-01 17:36:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:36:34,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:34,270 INFO L225 Difference]: With dead ends: 1385 [2022-03-01 17:36:34,270 INFO L226 Difference]: Without dead ends: 1385 [2022-03-01 17:36:34,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:36:34,270 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 84 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:34,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 152 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:36:34,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1385 states. [2022-03-01 17:36:34,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1385 to 1149. [2022-03-01 17:36:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1148 states have (on average 2.946864111498258) internal successors, (3383), 1148 states have internal predecessors, (3383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:34,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 3383 transitions. [2022-03-01 17:36:34,283 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 3383 transitions. Word has length 17 [2022-03-01 17:36:34,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:34,283 INFO L470 AbstractCegarLoop]: Abstraction has 1149 states and 3383 transitions. [2022-03-01 17:36:34,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 18 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:34,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 3383 transitions. [2022-03-01 17:36:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:34,285 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:34,285 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:34,300 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (365)] Ended with exit code 0 [2022-03-01 17:36:34,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable373,365 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:34,485 INFO L402 AbstractCegarLoop]: === Iteration 375 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:34,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1801815893, now seen corresponding path program 361 times [2022-03-01 17:36:34,485 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:34,485 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934823651] [2022-03-01 17:36:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:34,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:34,586 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:34,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934823651] [2022-03-01 17:36:34,587 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934823651] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:34,587 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431642787] [2022-03-01 17:36:34,587 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:34,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:34,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:34,588 INFO L229 MonitoredProcess]: Starting monitored process 366 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:34,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Waiting until timeout for monitored process [2022-03-01 17:36:34,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:34,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:34,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:34,788 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:34,788 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:34,791 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:34,791 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:34,816 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:34,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:34,908 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:34,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:34,910 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:34,928 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:34,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431642787] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:34,928 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:34,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:36:34,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471980066] [2022-03-01 17:36:34,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:34,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:34,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:34,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:34,929 INFO L87 Difference]: Start difference. First operand 1149 states and 3383 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:35,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:35,179 INFO L93 Difference]: Finished difference Result 1277 states and 3633 transitions. [2022-03-01 17:36:35,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:36:35,179 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:35,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:35,181 INFO L225 Difference]: With dead ends: 1277 [2022-03-01 17:36:35,181 INFO L226 Difference]: Without dead ends: 1277 [2022-03-01 17:36:35,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:35,181 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 51 mSDsluCounter, 387 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:35,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 178 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 560 Invalid, 0 Unknown, 66 Unchecked, 0.2s Time] [2022-03-01 17:36:35,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1277 states. [2022-03-01 17:36:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1277 to 1177. [2022-03-01 17:36:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1177 states, 1176 states have (on average 2.949829931972789) internal successors, (3469), 1176 states have internal predecessors, (3469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1177 states to 1177 states and 3469 transitions. [2022-03-01 17:36:35,193 INFO L78 Accepts]: Start accepts. Automaton has 1177 states and 3469 transitions. Word has length 17 [2022-03-01 17:36:35,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:35,193 INFO L470 AbstractCegarLoop]: Abstraction has 1177 states and 3469 transitions. [2022-03-01 17:36:35,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:35,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1177 states and 3469 transitions. [2022-03-01 17:36:35,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:35,195 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:35,195 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:35,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (366)] Ended with exit code 0 [2022-03-01 17:36:35,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,366 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:35,395 INFO L402 AbstractCegarLoop]: === Iteration 376 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:35,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:35,395 INFO L85 PathProgramCache]: Analyzing trace with hash -432291601, now seen corresponding path program 362 times [2022-03-01 17:36:35,395 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:35,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742468644] [2022-03-01 17:36:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:35,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:35,497 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:35,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742468644] [2022-03-01 17:36:35,497 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742468644] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:35,497 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640287970] [2022-03-01 17:36:35,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:35,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:35,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:35,498 INFO L229 MonitoredProcess]: Starting monitored process 367 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:35,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Waiting until timeout for monitored process [2022-03-01 17:36:35,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:35,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:35,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:35,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:35,695 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:35,695 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:35,698 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:35,698 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:35,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:35,820 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:35,820 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:35,822 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:35,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640287970] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:35,840 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:35,840 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:36:35,840 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164392636] [2022-03-01 17:36:35,840 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:35,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:35,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:35,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:35,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:35,841 INFO L87 Difference]: Start difference. First operand 1177 states and 3469 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:36,107 INFO L93 Difference]: Finished difference Result 1303 states and 3691 transitions. [2022-03-01 17:36:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:36:36,108 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:36,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:36,110 INFO L225 Difference]: With dead ends: 1303 [2022-03-01 17:36:36,110 INFO L226 Difference]: Without dead ends: 1303 [2022-03-01 17:36:36,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:36,110 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 62 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 189 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:36,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 184 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 583 Invalid, 0 Unknown, 189 Unchecked, 0.2s Time] [2022-03-01 17:36:36,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-03-01 17:36:36,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1173. [2022-03-01 17:36:36,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1173 states, 1172 states have (on average 2.948805460750853) internal successors, (3456), 1172 states have internal predecessors, (3456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:36,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1173 states to 1173 states and 3456 transitions. [2022-03-01 17:36:36,122 INFO L78 Accepts]: Start accepts. Automaton has 1173 states and 3456 transitions. Word has length 17 [2022-03-01 17:36:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:36,123 INFO L470 AbstractCegarLoop]: Abstraction has 1173 states and 3456 transitions. [2022-03-01 17:36:36,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand 1173 states and 3456 transitions. [2022-03-01 17:36:36,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:36,124 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:36,124 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:36,139 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (367)] Ended with exit code 0 [2022-03-01 17:36:36,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2022-03-01 17:36:36,324 INFO L402 AbstractCegarLoop]: === Iteration 377 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:36,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:36,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1296755733, now seen corresponding path program 363 times [2022-03-01 17:36:36,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:36,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302108016] [2022-03-01 17:36:36,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:36,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:36,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:36,426 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:36,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302108016] [2022-03-01 17:36:36,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302108016] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:36,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103532791] [2022-03-01 17:36:36,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:36,426 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:36,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:36,427 INFO L229 MonitoredProcess]: Starting monitored process 368 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:36,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Waiting until timeout for monitored process [2022-03-01 17:36:36,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:36:36,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:36,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:36,624 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:36,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:36,627 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:36,627 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:36,652 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:36,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:36,746 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:36,746 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:36,748 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:36,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:36,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103532791] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:36,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:36,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:36:36,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528848228] [2022-03-01 17:36:36,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:36,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:36,767 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:36,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:36,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:36,767 INFO L87 Difference]: Start difference. First operand 1173 states and 3456 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:36,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:36,990 INFO L93 Difference]: Finished difference Result 1274 states and 3652 transitions. [2022-03-01 17:36:36,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:36:36,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:36,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:36,992 INFO L225 Difference]: With dead ends: 1274 [2022-03-01 17:36:36,992 INFO L226 Difference]: Without dead ends: 1274 [2022-03-01 17:36:36,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:36,992 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 56 mSDsluCounter, 292 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:36,992 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 118 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 449 Invalid, 0 Unknown, 136 Unchecked, 0.2s Time] [2022-03-01 17:36:36,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2022-03-01 17:36:37,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1186. [2022-03-01 17:36:37,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 2.9527426160337553) internal successors, (3499), 1185 states have internal predecessors, (3499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:37,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 3499 transitions. [2022-03-01 17:36:37,005 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 3499 transitions. Word has length 17 [2022-03-01 17:36:37,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:37,005 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 3499 transitions. [2022-03-01 17:36:37,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:37,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 3499 transitions. [2022-03-01 17:36:37,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:37,006 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:37,006 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:37,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (368)] Ended with exit code 0 [2022-03-01 17:36:37,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable376,368 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:37,207 INFO L402 AbstractCegarLoop]: === Iteration 378 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:37,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:37,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1562268815, now seen corresponding path program 364 times [2022-03-01 17:36:37,207 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:37,207 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756836677] [2022-03-01 17:36:37,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:37,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:37,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:37,306 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:37,306 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:37,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756836677] [2022-03-01 17:36:37,307 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756836677] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:37,307 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23759726] [2022-03-01 17:36:37,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:37,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:37,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:37,308 INFO L229 MonitoredProcess]: Starting monitored process 369 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:37,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Waiting until timeout for monitored process [2022-03-01 17:36:37,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:37,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:37,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:37,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:37,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:37,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:37,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:37,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:37,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:37,656 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:37,656 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:37,658 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:37,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:37,681 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23759726] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:37,681 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:37,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:36:37,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778782948] [2022-03-01 17:36:37,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:37,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:37,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:37,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:37,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:37,682 INFO L87 Difference]: Start difference. First operand 1186 states and 3499 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:38,091 INFO L93 Difference]: Finished difference Result 1268 states and 3622 transitions. [2022-03-01 17:36:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:36:38,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:38,094 INFO L225 Difference]: With dead ends: 1268 [2022-03-01 17:36:38,094 INFO L226 Difference]: Without dead ends: 1260 [2022-03-01 17:36:38,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=825, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:36:38,094 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 763 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 101 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:38,094 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 124 Invalid, 763 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 656 Invalid, 0 Unknown, 101 Unchecked, 0.2s Time] [2022-03-01 17:36:38,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-03-01 17:36:38,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1191. [2022-03-01 17:36:38,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1191 states, 1190 states have (on average 2.9445378151260506) internal successors, (3504), 1190 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:38,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1191 states to 1191 states and 3504 transitions. [2022-03-01 17:36:38,114 INFO L78 Accepts]: Start accepts. Automaton has 1191 states and 3504 transitions. Word has length 17 [2022-03-01 17:36:38,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:38,114 INFO L470 AbstractCegarLoop]: Abstraction has 1191 states and 3504 transitions. [2022-03-01 17:36:38,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:38,114 INFO L276 IsEmpty]: Start isEmpty. Operand 1191 states and 3504 transitions. [2022-03-01 17:36:38,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:38,115 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:38,115 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:38,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (369)] Ended with exit code 0 [2022-03-01 17:36:38,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 369 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2022-03-01 17:36:38,316 INFO L402 AbstractCegarLoop]: === Iteration 379 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:38,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:38,316 INFO L85 PathProgramCache]: Analyzing trace with hash 640793779, now seen corresponding path program 365 times [2022-03-01 17:36:38,316 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:38,316 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408141059] [2022-03-01 17:36:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:38,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:38,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:38,420 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:38,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408141059] [2022-03-01 17:36:38,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408141059] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:38,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732741386] [2022-03-01 17:36:38,420 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:38,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:38,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:38,421 INFO L229 MonitoredProcess]: Starting monitored process 370 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:38,421 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Waiting until timeout for monitored process [2022-03-01 17:36:38,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:36:38,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:38,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:38,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:38,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:38,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:38,625 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:38,625 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:38,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:38,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:38,757 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:38,758 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:38,759 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:38,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:38,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732741386] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:38,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:38,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:36:38,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243059537] [2022-03-01 17:36:38,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:38,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:36:38,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:38,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:36:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:36:38,779 INFO L87 Difference]: Start difference. First operand 1191 states and 3504 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:39,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:39,646 INFO L93 Difference]: Finished difference Result 1344 states and 3767 transitions. [2022-03-01 17:36:39,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:36:39,646 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:39,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:39,647 INFO L225 Difference]: With dead ends: 1344 [2022-03-01 17:36:39,647 INFO L226 Difference]: Without dead ends: 1344 [2022-03-01 17:36:39,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:36:39,648 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 91 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:39,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 146 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 683 Invalid, 0 Unknown, 91 Unchecked, 0.3s Time] [2022-03-01 17:36:39,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1344 states. [2022-03-01 17:36:39,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1344 to 1187. [2022-03-01 17:36:39,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.948566610455312) internal successors, (3497), 1186 states have internal predecessors, (3497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 3497 transitions. [2022-03-01 17:36:39,660 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 3497 transitions. Word has length 17 [2022-03-01 17:36:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:39,660 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 3497 transitions. [2022-03-01 17:36:39,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:39,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 3497 transitions. [2022-03-01 17:36:39,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:39,662 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:39,662 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:39,678 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (370)] Ended with exit code 0 [2022-03-01 17:36:39,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 370 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2022-03-01 17:36:39,862 INFO L402 AbstractCegarLoop]: === Iteration 380 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:39,863 INFO L85 PathProgramCache]: Analyzing trace with hash -2100124393, now seen corresponding path program 366 times [2022-03-01 17:36:39,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:39,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533375332] [2022-03-01 17:36:39,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:39,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:39,966 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:39,966 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:39,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533375332] [2022-03-01 17:36:39,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533375332] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:39,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763269728] [2022-03-01 17:36:39,967 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:39,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:39,967 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:39,968 INFO L229 MonitoredProcess]: Starting monitored process 371 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:39,968 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Waiting until timeout for monitored process [2022-03-01 17:36:39,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:36:39,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:39,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:39,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:40,188 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:40,188 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:40,190 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:40,190 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:40,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:40,341 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:40,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:40,343 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:40,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763269728] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:40,370 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:40,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:36:40,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216035276] [2022-03-01 17:36:40,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:40,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:36:40,370 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:40,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:36:40,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:36:40,371 INFO L87 Difference]: Start difference. First operand 1187 states and 3497 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:40,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:40,894 INFO L93 Difference]: Finished difference Result 1267 states and 3624 transitions. [2022-03-01 17:36:40,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:36:40,895 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:40,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:40,896 INFO L225 Difference]: With dead ends: 1267 [2022-03-01 17:36:40,896 INFO L226 Difference]: Without dead ends: 1261 [2022-03-01 17:36:40,896 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:36:40,897 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 47 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 58 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:40,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 112 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 660 Invalid, 0 Unknown, 58 Unchecked, 0.3s Time] [2022-03-01 17:36:40,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1261 states. [2022-03-01 17:36:40,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1261 to 1190. [2022-03-01 17:36:40,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1190 states, 1189 states have (on average 2.943650126156434) internal successors, (3500), 1189 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:40,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1190 states to 1190 states and 3500 transitions. [2022-03-01 17:36:40,909 INFO L78 Accepts]: Start accepts. Automaton has 1190 states and 3500 transitions. Word has length 17 [2022-03-01 17:36:40,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:40,909 INFO L470 AbstractCegarLoop]: Abstraction has 1190 states and 3500 transitions. [2022-03-01 17:36:40,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:40,910 INFO L276 IsEmpty]: Start isEmpty. Operand 1190 states and 3500 transitions. [2022-03-01 17:36:40,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:40,911 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:40,911 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:40,927 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (371)] Ended with exit code 0 [2022-03-01 17:36:41,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable379 [2022-03-01 17:36:41,111 INFO L402 AbstractCegarLoop]: === Iteration 381 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:41,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:41,112 INFO L85 PathProgramCache]: Analyzing trace with hash 880436117, now seen corresponding path program 367 times [2022-03-01 17:36:41,112 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:41,112 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729667204] [2022-03-01 17:36:41,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:41,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:41,218 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:41,219 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:41,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729667204] [2022-03-01 17:36:41,219 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729667204] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:41,219 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207529095] [2022-03-01 17:36:41,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:41,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:41,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:41,220 INFO L229 MonitoredProcess]: Starting monitored process 372 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:41,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Waiting until timeout for monitored process [2022-03-01 17:36:41,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:41,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:41,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:41,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:41,430 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:41,432 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:41,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:41,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:41,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:41,576 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:41,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:41,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:41,596 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:41,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207529095] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:41,597 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:41,597 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:36:41,597 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824786454] [2022-03-01 17:36:41,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:41,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:36:41,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:41,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:36:41,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:41,597 INFO L87 Difference]: Start difference. First operand 1190 states and 3500 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:42,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:42,615 INFO L93 Difference]: Finished difference Result 1367 states and 3817 transitions. [2022-03-01 17:36:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:36:42,616 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:42,617 INFO L225 Difference]: With dead ends: 1367 [2022-03-01 17:36:42,617 INFO L226 Difference]: Without dead ends: 1367 [2022-03-01 17:36:42,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=313, Invalid=1757, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:36:42,618 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 93 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 60 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:42,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 92 Invalid, 813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 723 Invalid, 0 Unknown, 60 Unchecked, 0.3s Time] [2022-03-01 17:36:42,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2022-03-01 17:36:42,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1186. [2022-03-01 17:36:42,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 2.9459915611814345) internal successors, (3491), 1185 states have internal predecessors, (3491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 3491 transitions. [2022-03-01 17:36:42,631 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 3491 transitions. Word has length 17 [2022-03-01 17:36:42,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:42,631 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 3491 transitions. [2022-03-01 17:36:42,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:42,631 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 3491 transitions. [2022-03-01 17:36:42,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:42,632 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:42,632 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:42,648 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (372)] Ended with exit code 0 [2022-03-01 17:36:42,832 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 372 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2022-03-01 17:36:42,832 INFO L402 AbstractCegarLoop]: === Iteration 382 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:42,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:42,833 INFO L85 PathProgramCache]: Analyzing trace with hash -39264591, now seen corresponding path program 368 times [2022-03-01 17:36:42,833 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:42,833 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283472351] [2022-03-01 17:36:42,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:42,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:42,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:42,952 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:42,953 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:42,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283472351] [2022-03-01 17:36:42,953 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283472351] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:42,953 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5858637] [2022-03-01 17:36:42,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:42,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:42,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:42,954 INFO L229 MonitoredProcess]: Starting monitored process 373 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:42,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Waiting until timeout for monitored process [2022-03-01 17:36:42,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:42,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:42,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:42,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:43,171 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:43,172 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:43,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:43,174 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:43,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:43,328 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:43,328 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:43,330 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:43,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5858637] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:43,353 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:43,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:36:43,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218160812] [2022-03-01 17:36:43,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:43,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:36:43,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:43,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:36:43,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:43,354 INFO L87 Difference]: Start difference. First operand 1186 states and 3491 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:43,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:43,712 INFO L93 Difference]: Finished difference Result 1224 states and 3563 transitions. [2022-03-01 17:36:43,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:36:43,713 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:43,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:43,714 INFO L225 Difference]: With dead ends: 1224 [2022-03-01 17:36:43,714 INFO L226 Difference]: Without dead ends: 1220 [2022-03-01 17:36:43,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:36:43,714 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 28 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 15 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:43,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 28 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 570 Invalid, 0 Unknown, 15 Unchecked, 0.2s Time] [2022-03-01 17:36:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2022-03-01 17:36:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 1187. [2022-03-01 17:36:43,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.9443507588532882) internal successors, (3492), 1186 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 3492 transitions. [2022-03-01 17:36:43,726 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 3492 transitions. Word has length 17 [2022-03-01 17:36:43,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:43,726 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 3492 transitions. [2022-03-01 17:36:43,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:43,726 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 3492 transitions. [2022-03-01 17:36:43,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:43,728 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:43,728 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:43,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (373)] Ended with exit code 0 [2022-03-01 17:36:43,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,373 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:43,931 INFO L402 AbstractCegarLoop]: === Iteration 383 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:43,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:43,931 INFO L85 PathProgramCache]: Analyzing trace with hash 888166515, now seen corresponding path program 369 times [2022-03-01 17:36:43,932 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:43,932 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498693403] [2022-03-01 17:36:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:43,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:44,031 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:44,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498693403] [2022-03-01 17:36:44,031 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498693403] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:44,031 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600810756] [2022-03-01 17:36:44,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:44,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:44,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:44,032 INFO L229 MonitoredProcess]: Starting monitored process 374 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:44,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Waiting until timeout for monitored process [2022-03-01 17:36:44,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:36:44,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:44,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:44,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:44,205 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:44,205 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:44,207 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:44,207 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:44,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:44,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:44,398 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:44,399 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:44,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:44,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:44,419 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600810756] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:44,419 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:44,419 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:36:44,419 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234216689] [2022-03-01 17:36:44,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:44,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:36:44,419 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:44,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:36:44,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=365, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:44,420 INFO L87 Difference]: Start difference. First operand 1187 states and 3492 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:45,589 INFO L93 Difference]: Finished difference Result 1427 states and 3897 transitions. [2022-03-01 17:36:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-03-01 17:36:45,590 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:45,592 INFO L225 Difference]: With dead ends: 1427 [2022-03-01 17:36:45,592 INFO L226 Difference]: Without dead ends: 1427 [2022-03-01 17:36:45,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 515 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=324, Invalid=2028, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:36:45,593 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 151 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:45,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 118 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:36:45,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1427 states. [2022-03-01 17:36:45,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1427 to 1176. [2022-03-01 17:36:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1176 states, 1175 states have (on average 2.9404255319148938) internal successors, (3455), 1175 states have internal predecessors, (3455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1176 states to 1176 states and 3455 transitions. [2022-03-01 17:36:45,607 INFO L78 Accepts]: Start accepts. Automaton has 1176 states and 3455 transitions. Word has length 17 [2022-03-01 17:36:45,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:45,607 INFO L470 AbstractCegarLoop]: Abstraction has 1176 states and 3455 transitions. [2022-03-01 17:36:45,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:45,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1176 states and 3455 transitions. [2022-03-01 17:36:45,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:45,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:45,609 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:45,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (374)] Ended with exit code 0 [2022-03-01 17:36:45,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,374 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:45,810 INFO L402 AbstractCegarLoop]: === Iteration 384 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:45,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:45,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1689782743, now seen corresponding path program 370 times [2022-03-01 17:36:45,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:45,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674000144] [2022-03-01 17:36:45,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:45,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:45,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:45,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:45,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674000144] [2022-03-01 17:36:45,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674000144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:45,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210227096] [2022-03-01 17:36:45,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:45,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:45,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:45,928 INFO L229 MonitoredProcess]: Starting monitored process 375 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:45,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Waiting until timeout for monitored process [2022-03-01 17:36:45,953 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:45,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:45,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:45,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:46,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:46,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:46,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:46,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:46,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:46,311 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:46,311 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:46,313 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:46,336 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:46,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210227096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:46,336 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:46,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:36:46,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484272624] [2022-03-01 17:36:46,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:46,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:36:46,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:46,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:36:46,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:36:46,337 INFO L87 Difference]: Start difference. First operand 1176 states and 3455 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:46,917 INFO L93 Difference]: Finished difference Result 1293 states and 3666 transitions. [2022-03-01 17:36:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:36:46,918 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:46,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:46,921 INFO L225 Difference]: With dead ends: 1293 [2022-03-01 17:36:46,921 INFO L226 Difference]: Without dead ends: 1289 [2022-03-01 17:36:46,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1102, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:36:46,921 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 126 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:46,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 104 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:36:46,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2022-03-01 17:36:46,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 1188. [2022-03-01 17:36:46,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1188 states, 1187 states have (on average 2.945240101095198) internal successors, (3496), 1187 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:46,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1188 states to 1188 states and 3496 transitions. [2022-03-01 17:36:46,936 INFO L78 Accepts]: Start accepts. Automaton has 1188 states and 3496 transitions. Word has length 17 [2022-03-01 17:36:46,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:46,936 INFO L470 AbstractCegarLoop]: Abstraction has 1188 states and 3496 transitions. [2022-03-01 17:36:46,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:46,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1188 states and 3496 transitions. [2022-03-01 17:36:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:46,937 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:46,937 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:46,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (375)] Ended with exit code 0 [2022-03-01 17:36:47,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,375 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:47,138 INFO L402 AbstractCegarLoop]: === Iteration 385 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:47,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash -886840847, now seen corresponding path program 371 times [2022-03-01 17:36:47,138 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:47,138 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277096841] [2022-03-01 17:36:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:47,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:47,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:47,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:47,247 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:47,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277096841] [2022-03-01 17:36:47,247 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277096841] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:47,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259994979] [2022-03-01 17:36:47,248 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:47,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:47,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:47,249 INFO L229 MonitoredProcess]: Starting monitored process 376 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:47,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Waiting until timeout for monitored process [2022-03-01 17:36:47,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:36:47,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:47,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:47,421 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:47,422 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:47,423 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:47,423 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:47,490 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:47,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:47,621 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:47,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:47,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:47,646 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:47,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259994979] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:47,646 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:47,647 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:36:47,647 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714599274] [2022-03-01 17:36:47,647 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:47,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:36:47,647 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:47,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:36:47,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:36:47,647 INFO L87 Difference]: Start difference. First operand 1188 states and 3496 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:48,066 INFO L93 Difference]: Finished difference Result 1290 states and 3658 transitions. [2022-03-01 17:36:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:36:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:48,068 INFO L225 Difference]: With dead ends: 1290 [2022-03-01 17:36:48,069 INFO L226 Difference]: Without dead ends: 1290 [2022-03-01 17:36:48,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=600, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:36:48,069 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 84 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 866 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:48,069 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 172 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 866 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:36:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1290 states. [2022-03-01 17:36:48,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1290 to 1182. [2022-03-01 17:36:48,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.9415749364944963) internal successors, (3474), 1181 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:48,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3474 transitions. [2022-03-01 17:36:48,081 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3474 transitions. Word has length 17 [2022-03-01 17:36:48,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:48,082 INFO L470 AbstractCegarLoop]: Abstraction has 1182 states and 3474 transitions. [2022-03-01 17:36:48,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:48,082 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3474 transitions. [2022-03-01 17:36:48,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:48,083 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:48,083 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:48,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (376)] Ended with exit code 0 [2022-03-01 17:36:48,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,376 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:48,283 INFO L402 AbstractCegarLoop]: === Iteration 386 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:48,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:48,284 INFO L85 PathProgramCache]: Analyzing trace with hash -10398669, now seen corresponding path program 372 times [2022-03-01 17:36:48,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:48,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662175676] [2022-03-01 17:36:48,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:48,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:48,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:48,387 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:48,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662175676] [2022-03-01 17:36:48,387 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662175676] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:48,387 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671565811] [2022-03-01 17:36:48,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:48,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:48,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:48,388 INFO L229 MonitoredProcess]: Starting monitored process 377 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:48,389 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Waiting until timeout for monitored process [2022-03-01 17:36:48,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:36:48,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:48,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:48,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:48,572 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:48,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:48,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:48,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:48,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:48,687 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:48,688 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:48,689 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:48,710 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:48,710 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671565811] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:48,710 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:48,711 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:36:48,711 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747491673] [2022-03-01 17:36:48,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:48,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:48,711 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:48,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:48,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:48,711 INFO L87 Difference]: Start difference. First operand 1182 states and 3474 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:49,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:49,008 INFO L93 Difference]: Finished difference Result 1340 states and 3812 transitions. [2022-03-01 17:36:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:36:49,009 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:49,010 INFO L225 Difference]: With dead ends: 1340 [2022-03-01 17:36:49,010 INFO L226 Difference]: Without dead ends: 1340 [2022-03-01 17:36:49,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:36:49,011 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 47 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 157 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:49,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 132 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 664 Invalid, 0 Unknown, 157 Unchecked, 0.2s Time] [2022-03-01 17:36:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1340 states. [2022-03-01 17:36:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1340 to 1197. [2022-03-01 17:36:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.947324414715719) internal successors, (3525), 1196 states have internal predecessors, (3525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3525 transitions. [2022-03-01 17:36:49,023 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3525 transitions. Word has length 17 [2022-03-01 17:36:49,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:49,023 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 3525 transitions. [2022-03-01 17:36:49,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:49,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3525 transitions. [2022-03-01 17:36:49,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:49,025 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:49,025 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:49,041 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (377)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:49,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2022-03-01 17:36:49,225 INFO L402 AbstractCegarLoop]: === Iteration 387 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:49,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:49,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1543650455, now seen corresponding path program 373 times [2022-03-01 17:36:49,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:49,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509925335] [2022-03-01 17:36:49,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:49,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:49,312 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:49,312 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:49,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509925335] [2022-03-01 17:36:49,312 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509925335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:49,312 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182692412] [2022-03-01 17:36:49,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:49,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:49,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:49,313 INFO L229 MonitoredProcess]: Starting monitored process 378 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:49,314 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Waiting until timeout for monitored process [2022-03-01 17:36:49,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:49,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:49,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:49,511 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:49,512 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:49,513 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:49,514 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:49,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:49,632 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:49,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:49,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:49,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:49,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182692412] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:49,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:49,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:36:49,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80843698] [2022-03-01 17:36:49,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:49,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:49,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:49,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:49,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:49,661 INFO L87 Difference]: Start difference. First operand 1197 states and 3525 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:50,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:50,051 INFO L93 Difference]: Finished difference Result 1263 states and 3632 transitions. [2022-03-01 17:36:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:36:50,051 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:50,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:50,053 INFO L225 Difference]: With dead ends: 1263 [2022-03-01 17:36:50,053 INFO L226 Difference]: Without dead ends: 1257 [2022-03-01 17:36:50,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=765, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:36:50,053 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 51 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 729 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:50,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 70 Invalid, 729 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 636 Invalid, 0 Unknown, 87 Unchecked, 0.2s Time] [2022-03-01 17:36:50,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1257 states. [2022-03-01 17:36:50,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1257 to 1197. [2022-03-01 17:36:50,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.9448160535117056) internal successors, (3522), 1196 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3522 transitions. [2022-03-01 17:36:50,072 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3522 transitions. Word has length 17 [2022-03-01 17:36:50,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:50,072 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 3522 transitions. [2022-03-01 17:36:50,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:50,072 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3522 transitions. [2022-03-01 17:36:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:50,073 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:50,073 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:50,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (378)] Ended with exit code 0 [2022-03-01 17:36:50,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2022-03-01 17:36:50,273 INFO L402 AbstractCegarLoop]: === Iteration 388 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:50,274 INFO L85 PathProgramCache]: Analyzing trace with hash 229243669, now seen corresponding path program 374 times [2022-03-01 17:36:50,274 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:50,274 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007351771] [2022-03-01 17:36:50,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:50,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:50,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:50,365 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:50,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007351771] [2022-03-01 17:36:50,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007351771] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:50,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250010710] [2022-03-01 17:36:50,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:50,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:50,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:50,366 INFO L229 MonitoredProcess]: Starting monitored process 379 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:50,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Waiting until timeout for monitored process [2022-03-01 17:36:50,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:50,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:50,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:50,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:50,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:50,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:50,557 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:50,557 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:50,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:50,678 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:50,679 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:50,680 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:50,701 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:50,701 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250010710] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:50,701 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:50,701 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:36:50,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843676956] [2022-03-01 17:36:50,702 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:50,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:50,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:50,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:50,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:50,702 INFO L87 Difference]: Start difference. First operand 1197 states and 3522 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:51,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:51,455 INFO L93 Difference]: Finished difference Result 1384 states and 3897 transitions. [2022-03-01 17:36:51,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:36:51,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:51,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:51,457 INFO L225 Difference]: With dead ends: 1384 [2022-03-01 17:36:51,457 INFO L226 Difference]: Without dead ends: 1382 [2022-03-01 17:36:51,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=226, Invalid=1256, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:36:51,457 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 66 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 751 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 70 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:51,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 84 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 751 Invalid, 0 Unknown, 70 Unchecked, 0.3s Time] [2022-03-01 17:36:51,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2022-03-01 17:36:51,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1204. [2022-03-01 17:36:51,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 2.943474646716542) internal successors, (3541), 1203 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:51,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 3541 transitions. [2022-03-01 17:36:51,470 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 3541 transitions. Word has length 17 [2022-03-01 17:36:51,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:51,470 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 3541 transitions. [2022-03-01 17:36:51,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:51,470 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 3541 transitions. [2022-03-01 17:36:51,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:51,471 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:51,471 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:51,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (379)] Ended with exit code 0 [2022-03-01 17:36:51,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable387 [2022-03-01 17:36:51,672 INFO L402 AbstractCegarLoop]: === Iteration 389 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:51,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:51,672 INFO L85 PathProgramCache]: Analyzing trace with hash -690457039, now seen corresponding path program 375 times [2022-03-01 17:36:51,672 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:51,672 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100784888] [2022-03-01 17:36:51,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:51,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:51,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:51,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:51,774 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:51,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100784888] [2022-03-01 17:36:51,774 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100784888] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:51,774 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479953872] [2022-03-01 17:36:51,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:51,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:51,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:51,775 INFO L229 MonitoredProcess]: Starting monitored process 380 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:51,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Waiting until timeout for monitored process [2022-03-01 17:36:51,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:36:51,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:51,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:36:51,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:51,973 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:51,973 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:51,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:51,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:52,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:52,098 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:52,098 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:52,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:52,127 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:52,127 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479953872] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:52,127 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:52,127 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:36:52,127 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895543293] [2022-03-01 17:36:52,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:52,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:52,127 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:52,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:52,127 INFO L87 Difference]: Start difference. First operand 1204 states and 3541 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:52,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:52,615 INFO L93 Difference]: Finished difference Result 1264 states and 3647 transitions. [2022-03-01 17:36:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:36:52,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:52,617 INFO L225 Difference]: With dead ends: 1264 [2022-03-01 17:36:52,617 INFO L226 Difference]: Without dead ends: 1260 [2022-03-01 17:36:52,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=917, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:36:52,617 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 55 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 689 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 689 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:52,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 54 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 689 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-03-01 17:36:52,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1260 states. [2022-03-01 17:36:52,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1260 to 1207. [2022-03-01 17:36:52,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.941127694859038) internal successors, (3547), 1206 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:52,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 3547 transitions. [2022-03-01 17:36:52,637 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 3547 transitions. Word has length 17 [2022-03-01 17:36:52,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:52,637 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 3547 transitions. [2022-03-01 17:36:52,637 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:52,637 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 3547 transitions. [2022-03-01 17:36:52,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:52,639 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:52,639 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:52,654 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (380)] Ended with exit code 0 [2022-03-01 17:36:52,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2022-03-01 17:36:52,839 INFO L402 AbstractCegarLoop]: === Iteration 390 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:52,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:52,839 INFO L85 PathProgramCache]: Analyzing trace with hash 236974067, now seen corresponding path program 376 times [2022-03-01 17:36:52,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:52,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151659672] [2022-03-01 17:36:52,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:52,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:52,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:52,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:52,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151659672] [2022-03-01 17:36:52,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151659672] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:52,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209248712] [2022-03-01 17:36:52,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:52,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:52,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:52,928 INFO L229 MonitoredProcess]: Starting monitored process 381 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:52,929 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Waiting until timeout for monitored process [2022-03-01 17:36:52,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:52,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:52,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:52,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:53,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:53,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:53,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:53,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:53,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:53,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:53,238 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:53,239 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:36:53,240 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:36:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:53,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209248712] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:53,261 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:53,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:36:53,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759197626] [2022-03-01 17:36:53,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:53,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:53,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:53,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:53,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:53,262 INFO L87 Difference]: Start difference. First operand 1207 states and 3547 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:54,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:54,114 INFO L93 Difference]: Finished difference Result 1416 states and 3977 transitions. [2022-03-01 17:36:54,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-01 17:36:54,115 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:54,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:54,116 INFO L225 Difference]: With dead ends: 1416 [2022-03-01 17:36:54,116 INFO L226 Difference]: Without dead ends: 1412 [2022-03-01 17:36:54,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=1536, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:36:54,117 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 86 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:54,117 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 72 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:36:54,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1412 states. [2022-03-01 17:36:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1412 to 1199. [2022-03-01 17:36:54,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 2.9307178631051753) internal successors, (3511), 1198 states have internal predecessors, (3511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:54,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3511 transitions. [2022-03-01 17:36:54,136 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3511 transitions. Word has length 17 [2022-03-01 17:36:54,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:54,137 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 3511 transitions. [2022-03-01 17:36:54,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:54,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3511 transitions. [2022-03-01 17:36:54,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:54,138 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:54,138 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:54,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (381)] Ended with exit code 0 [2022-03-01 17:36:54,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable389 [2022-03-01 17:36:54,340 INFO L402 AbstractCegarLoop]: === Iteration 391 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:54,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:54,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1038590295, now seen corresponding path program 377 times [2022-03-01 17:36:54,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:54,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624157335] [2022-03-01 17:36:54,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:54,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:54,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:54,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:54,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624157335] [2022-03-01 17:36:54,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624157335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:54,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814908235] [2022-03-01 17:36:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:36:54,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:54,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:54,434 INFO L229 MonitoredProcess]: Starting monitored process 382 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:54,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Waiting until timeout for monitored process [2022-03-01 17:36:54,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:36:54,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:54,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:54,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:54,587 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:54,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:54,589 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:54,589 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:54,666 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:54,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:54,750 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:54,750 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:54,752 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:54,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814908235] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:54,778 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:54,778 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:36:54,778 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875394827] [2022-03-01 17:36:54,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:54,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:54,778 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:54,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:54,779 INFO L87 Difference]: Start difference. First operand 1199 states and 3511 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:55,336 INFO L93 Difference]: Finished difference Result 1275 states and 3662 transitions. [2022-03-01 17:36:55,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:36:55,336 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:55,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:55,338 INFO L225 Difference]: With dead ends: 1275 [2022-03-01 17:36:55,338 INFO L226 Difference]: Without dead ends: 1270 [2022-03-01 17:36:55,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=156, Invalid=966, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:36:55,338 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 64 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 712 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:55,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 34 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 712 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:36:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1270 states. [2022-03-01 17:36:55,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1270 to 1203. [2022-03-01 17:36:55,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 2.930116472545757) internal successors, (3522), 1202 states have internal predecessors, (3522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3522 transitions. [2022-03-01 17:36:55,360 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3522 transitions. Word has length 17 [2022-03-01 17:36:55,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:55,360 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 3522 transitions. [2022-03-01 17:36:55,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3522 transitions. [2022-03-01 17:36:55,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:55,361 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:55,361 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:55,377 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (382)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:55,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,382 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:55,562 INFO L402 AbstractCegarLoop]: === Iteration 392 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:55,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:55,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1538033295, now seen corresponding path program 378 times [2022-03-01 17:36:55,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:55,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154025940] [2022-03-01 17:36:55,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:55,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:55,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:55,654 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:55,654 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:55,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154025940] [2022-03-01 17:36:55,654 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154025940] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:55,654 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834586191] [2022-03-01 17:36:55,654 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:36:55,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:55,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:55,656 INFO L229 MonitoredProcess]: Starting monitored process 383 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:55,656 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Waiting until timeout for monitored process [2022-03-01 17:36:55,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:36:55,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:55,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:55,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:55,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:55,809 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:55,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:55,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:55,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:55,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:55,961 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:36:55,961 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:36:55,963 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:55,989 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:55,989 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834586191] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:55,989 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:55,989 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:36:55,990 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753033092] [2022-03-01 17:36:55,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:55,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:36:55,990 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:55,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:36:55,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:36:55,990 INFO L87 Difference]: Start difference. First operand 1203 states and 3522 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:56,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:56,423 INFO L93 Difference]: Finished difference Result 1268 states and 3649 transitions. [2022-03-01 17:36:56,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:36:56,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:56,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:56,425 INFO L225 Difference]: With dead ends: 1268 [2022-03-01 17:36:56,425 INFO L226 Difference]: Without dead ends: 1268 [2022-03-01 17:36:56,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=115, Invalid=641, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:36:56,425 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 34 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:56,425 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:36:56,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1268 states. [2022-03-01 17:36:56,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1268 to 1194. [2022-03-01 17:36:56,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 2.9295892707460185) internal successors, (3495), 1193 states have internal predecessors, (3495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:56,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 3495 transitions. [2022-03-01 17:36:56,438 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 3495 transitions. Word has length 17 [2022-03-01 17:36:56,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:56,438 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 3495 transitions. [2022-03-01 17:36:56,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 3495 transitions. [2022-03-01 17:36:56,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:56,439 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:56,439 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:56,455 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (383)] Ended with exit code 0 [2022-03-01 17:36:56,639 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,383 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:56,640 INFO L402 AbstractCegarLoop]: === Iteration 393 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:56,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:56,640 INFO L85 PathProgramCache]: Analyzing trace with hash 208237461, now seen corresponding path program 379 times [2022-03-01 17:36:56,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:56,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235282778] [2022-03-01 17:36:56,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:56,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:56,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:56,724 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:56,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235282778] [2022-03-01 17:36:56,724 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235282778] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:56,724 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300305584] [2022-03-01 17:36:56,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:36:56,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:56,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:56,726 INFO L229 MonitoredProcess]: Starting monitored process 384 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:56,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Waiting until timeout for monitored process [2022-03-01 17:36:56,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:56,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:56,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:56,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:56,908 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:36:56,911 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:56,911 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:36:56,934 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:56,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:57,012 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:36:57,012 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:36:57,014 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:36:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:57,039 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300305584] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:57,039 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:57,039 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:36:57,039 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151220978] [2022-03-01 17:36:57,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:57,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:57,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:57,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:57,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:57,039 INFO L87 Difference]: Start difference. First operand 1194 states and 3495 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:57,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:57,340 INFO L93 Difference]: Finished difference Result 1315 states and 3743 transitions. [2022-03-01 17:36:57,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:36:57,340 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:57,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:57,342 INFO L225 Difference]: With dead ends: 1315 [2022-03-01 17:36:57,342 INFO L226 Difference]: Without dead ends: 1315 [2022-03-01 17:36:57,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:36:57,342 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 47 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 9 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:57,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 58 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 568 Invalid, 0 Unknown, 9 Unchecked, 0.2s Time] [2022-03-01 17:36:57,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-03-01 17:36:57,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1198. [2022-03-01 17:36:57,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.9289891395154553) internal successors, (3506), 1197 states have internal predecessors, (3506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:57,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3506 transitions. [2022-03-01 17:36:57,354 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3506 transitions. Word has length 17 [2022-03-01 17:36:57,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:57,354 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 3506 transitions. [2022-03-01 17:36:57,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:57,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3506 transitions. [2022-03-01 17:36:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:57,355 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:57,355 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:57,371 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (384)] Ended with exit code 0 [2022-03-01 17:36:57,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable392 [2022-03-01 17:36:57,556 INFO L402 AbstractCegarLoop]: === Iteration 394 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:57,556 INFO L85 PathProgramCache]: Analyzing trace with hash -711463247, now seen corresponding path program 380 times [2022-03-01 17:36:57,556 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:57,556 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329350313] [2022-03-01 17:36:57,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:57,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:57,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:57,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:57,643 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:57,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329350313] [2022-03-01 17:36:57,644 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329350313] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:57,644 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418675255] [2022-03-01 17:36:57,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:36:57,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:57,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:57,645 INFO L229 MonitoredProcess]: Starting monitored process 385 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:57,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Waiting until timeout for monitored process [2022-03-01 17:36:57,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:36:57,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:57,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:57,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:57,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:57,826 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:36:57,828 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:57,828 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:36:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:57,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:57,941 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:36:57,941 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:36:57,943 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:36:57,978 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:57,979 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1418675255] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:57,979 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:57,979 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:36:57,979 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477120926] [2022-03-01 17:36:57,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:57,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:57,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:57,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:57,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:57,979 INFO L87 Difference]: Start difference. First operand 1198 states and 3506 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:58,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:58,412 INFO L93 Difference]: Finished difference Result 1251 states and 3599 transitions. [2022-03-01 17:36:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:36:58,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:58,414 INFO L225 Difference]: With dead ends: 1251 [2022-03-01 17:36:58,414 INFO L226 Difference]: Without dead ends: 1247 [2022-03-01 17:36:58,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:36:58,414 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 48 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:58,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 50 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 626 Invalid, 0 Unknown, 34 Unchecked, 0.2s Time] [2022-03-01 17:36:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-03-01 17:36:58,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1198. [2022-03-01 17:36:58,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.9206349206349205) internal successors, (3496), 1197 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:58,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3496 transitions. [2022-03-01 17:36:58,426 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3496 transitions. Word has length 17 [2022-03-01 17:36:58,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:58,426 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 3496 transitions. [2022-03-01 17:36:58,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:58,426 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3496 transitions. [2022-03-01 17:36:58,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:58,427 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:58,428 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:58,443 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (385)] Ended with exit code 0 [2022-03-01 17:36:58,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable393,385 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:58,630 INFO L402 AbstractCegarLoop]: === Iteration 395 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:58,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:58,630 INFO L85 PathProgramCache]: Analyzing trace with hash 215967859, now seen corresponding path program 381 times [2022-03-01 17:36:58,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:58,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114485337] [2022-03-01 17:36:58,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:58,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:58,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:58,719 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:58,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114485337] [2022-03-01 17:36:58,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114485337] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:58,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101158295] [2022-03-01 17:36:58,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:36:58,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:58,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:58,720 INFO L229 MonitoredProcess]: Starting monitored process 386 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:58,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Waiting until timeout for monitored process [2022-03-01 17:36:58,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:36:58,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:58,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:58,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:58,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:58,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:58,858 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:58,858 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:58,922 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:58,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:36:58,996 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:36:58,996 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:36:58,998 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:36:59,022 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:59,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101158295] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:36:59,022 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:36:59,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:36:59,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171426096] [2022-03-01 17:36:59,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:36:59,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:36:59,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:36:59,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:36:59,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:36:59,023 INFO L87 Difference]: Start difference. First operand 1198 states and 3496 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:59,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:36:59,465 INFO L93 Difference]: Finished difference Result 1338 states and 3739 transitions. [2022-03-01 17:36:59,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:36:59,465 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:36:59,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:36:59,467 INFO L225 Difference]: With dead ends: 1338 [2022-03-01 17:36:59,467 INFO L226 Difference]: Without dead ends: 1336 [2022-03-01 17:36:59,467 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:36:59,467 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 95 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:36:59,467 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 44 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:36:59,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2022-03-01 17:36:59,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1195. [2022-03-01 17:36:59,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.909547738693467) internal successors, (3474), 1194 states have internal predecessors, (3474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:59,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3474 transitions. [2022-03-01 17:36:59,479 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3474 transitions. Word has length 17 [2022-03-01 17:36:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:36:59,480 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 3474 transitions. [2022-03-01 17:36:59,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:36:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3474 transitions. [2022-03-01 17:36:59,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:36:59,481 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:36:59,481 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:36:59,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (386)] Forceful destruction successful, exit code 0 [2022-03-01 17:36:59,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,386 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:59,681 INFO L402 AbstractCegarLoop]: === Iteration 396 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:36:59,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:36:59,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1017584087, now seen corresponding path program 382 times [2022-03-01 17:36:59,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:36:59,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951995531] [2022-03-01 17:36:59,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:36:59,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:36:59,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:36:59,777 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:59,778 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:36:59,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951995531] [2022-03-01 17:36:59,778 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951995531] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:36:59,778 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781862738] [2022-03-01 17:36:59,778 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:36:59,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:36:59,778 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:36:59,779 INFO L229 MonitoredProcess]: Starting monitored process 387 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:36:59,779 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Waiting until timeout for monitored process [2022-03-01 17:36:59,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:36:59,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:36:59,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:36:59,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:36:59,913 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:59,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:36:59,915 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:36:59,915 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:36:59,992 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:36:59,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:00,058 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:00,058 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:37:00,060 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:00,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:00,090 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781862738] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:00,090 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:00,090 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:37:00,090 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219935682] [2022-03-01 17:37:00,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:00,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:37:00,091 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:00,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:37:00,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:37:00,091 INFO L87 Difference]: Start difference. First operand 1195 states and 3474 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:00,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:00,754 INFO L93 Difference]: Finished difference Result 1310 states and 3684 transitions. [2022-03-01 17:37:00,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:37:00,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:00,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:00,756 INFO L225 Difference]: With dead ends: 1310 [2022-03-01 17:37:00,756 INFO L226 Difference]: Without dead ends: 1306 [2022-03-01 17:37:00,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=201, Invalid=1359, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:37:00,756 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 126 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:00,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 44 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:00,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1306 states. [2022-03-01 17:37:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1306 to 1201. [2022-03-01 17:37:00,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1201 states, 1200 states have (on average 2.9033333333333333) internal successors, (3484), 1200 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1201 states to 1201 states and 3484 transitions. [2022-03-01 17:37:00,776 INFO L78 Accepts]: Start accepts. Automaton has 1201 states and 3484 transitions. Word has length 17 [2022-03-01 17:37:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:00,776 INFO L470 AbstractCegarLoop]: Abstraction has 1201 states and 3484 transitions. [2022-03-01 17:37:00,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:00,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1201 states and 3484 transitions. [2022-03-01 17:37:00,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:00,777 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:00,777 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:00,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (387)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:00,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,387 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:00,978 INFO L402 AbstractCegarLoop]: === Iteration 397 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:00,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:00,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1559039503, now seen corresponding path program 383 times [2022-03-01 17:37:00,978 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:00,978 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82810687] [2022-03-01 17:37:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:00,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:01,071 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:01,071 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:01,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82810687] [2022-03-01 17:37:01,071 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82810687] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:01,071 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521056234] [2022-03-01 17:37:01,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:01,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:01,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:01,072 INFO L229 MonitoredProcess]: Starting monitored process 388 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:01,073 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Waiting until timeout for monitored process [2022-03-01 17:37:01,098 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:37:01,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:01,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:01,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:01,209 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:01,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:01,211 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:01,212 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:01,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:01,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:01,342 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:01,342 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:37:01,344 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:01,373 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521056234] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:01,373 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:01,373 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:37:01,373 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656180978] [2022-03-01 17:37:01,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:01,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:37:01,374 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:01,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:37:01,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:37:01,374 INFO L87 Difference]: Start difference. First operand 1201 states and 3484 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:01,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:01,838 INFO L93 Difference]: Finished difference Result 1298 states and 3656 transitions. [2022-03-01 17:37:01,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:37:01,838 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:01,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:01,840 INFO L225 Difference]: With dead ends: 1298 [2022-03-01 17:37:01,840 INFO L226 Difference]: Without dead ends: 1298 [2022-03-01 17:37:01,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:37:01,840 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 53 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:01,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 46 Invalid, 673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:37:01,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2022-03-01 17:37:01,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1180. [2022-03-01 17:37:01,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 2.889737065309584) internal successors, (3407), 1179 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:01,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3407 transitions. [2022-03-01 17:37:01,853 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3407 transitions. Word has length 17 [2022-03-01 17:37:01,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:01,853 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3407 transitions. [2022-03-01 17:37:01,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:01,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3407 transitions. [2022-03-01 17:37:01,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:01,854 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:01,854 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:01,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (388)] Ended with exit code 0 [2022-03-01 17:37:02,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,388 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:02,055 INFO L402 AbstractCegarLoop]: === Iteration 398 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:02,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:02,055 INFO L85 PathProgramCache]: Analyzing trace with hash 334084049, now seen corresponding path program 384 times [2022-03-01 17:37:02,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:02,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114768112] [2022-03-01 17:37:02,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:02,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:02,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:02,145 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:02,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114768112] [2022-03-01 17:37:02,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114768112] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:02,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24002108] [2022-03-01 17:37:02,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:02,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:02,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:02,151 INFO L229 MonitoredProcess]: Starting monitored process 389 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:02,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Waiting until timeout for monitored process [2022-03-01 17:37:02,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:37:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:02,290 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:02,290 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:02,292 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:02,295 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:02,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:02,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:02,430 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:02,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:37:02,432 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:02,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:02,462 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24002108] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:02,462 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:02,462 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:37:02,462 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132908641] [2022-03-01 17:37:02,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:02,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:37:02,462 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:02,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:37:02,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:37:02,462 INFO L87 Difference]: Start difference. First operand 1180 states and 3407 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:03,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:03,039 INFO L93 Difference]: Finished difference Result 1283 states and 3583 transitions. [2022-03-01 17:37:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:37:03,039 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:03,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:03,040 INFO L225 Difference]: With dead ends: 1283 [2022-03-01 17:37:03,041 INFO L226 Difference]: Without dead ends: 1279 [2022-03-01 17:37:03,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:37:03,041 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 120 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 608 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:03,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 54 Invalid, 640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 608 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:37:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1279 states. [2022-03-01 17:37:03,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1279 to 1180. [2022-03-01 17:37:03,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 2.8812553011026294) internal successors, (3397), 1179 states have internal predecessors, (3397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:03,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3397 transitions. [2022-03-01 17:37:03,053 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3397 transitions. Word has length 17 [2022-03-01 17:37:03,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:03,053 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3397 transitions. [2022-03-01 17:37:03,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:03,053 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3397 transitions. [2022-03-01 17:37:03,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:03,054 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:03,054 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:03,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (389)] Ended with exit code 0 [2022-03-01 17:37:03,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable397 [2022-03-01 17:37:03,254 INFO L402 AbstractCegarLoop]: === Iteration 399 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:03,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:03,255 INFO L85 PathProgramCache]: Analyzing trace with hash 2063131383, now seen corresponding path program 385 times [2022-03-01 17:37:03,255 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:03,255 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424615028] [2022-03-01 17:37:03,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:03,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:03,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:03,353 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:03,354 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:03,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424615028] [2022-03-01 17:37:03,354 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424615028] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:03,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028282896] [2022-03-01 17:37:03,354 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:03,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:03,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:03,355 INFO L229 MonitoredProcess]: Starting monitored process 390 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:03,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Waiting until timeout for monitored process [2022-03-01 17:37:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:03,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:03,529 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:03,529 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:37:03,531 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:03,531 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:37:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:03,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:03,628 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:03,628 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:37:03,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:03,660 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:03,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028282896] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:03,660 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:03,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 18 [2022-03-01 17:37:03,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627303090] [2022-03-01 17:37:03,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:03,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:37:03,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:03,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:37:03,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:37:03,661 INFO L87 Difference]: Start difference. First operand 1180 states and 3397 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:04,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:04,140 INFO L93 Difference]: Finished difference Result 1237 states and 3500 transitions. [2022-03-01 17:37:04,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:37:04,140 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:04,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:04,142 INFO L225 Difference]: With dead ends: 1237 [2022-03-01 17:37:04,142 INFO L226 Difference]: Without dead ends: 1229 [2022-03-01 17:37:04,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:37:04,142 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 49 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:04,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 76 Invalid, 711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:04,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1229 states. [2022-03-01 17:37:04,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1229 to 1180. [2022-03-01 17:37:04,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1180 states, 1179 states have (on average 2.8710771840542835) internal successors, (3385), 1179 states have internal predecessors, (3385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:04,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1180 states to 1180 states and 3385 transitions. [2022-03-01 17:37:04,160 INFO L78 Accepts]: Start accepts. Automaton has 1180 states and 3385 transitions. Word has length 17 [2022-03-01 17:37:04,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:04,160 INFO L470 AbstractCegarLoop]: Abstraction has 1180 states and 3385 transitions. [2022-03-01 17:37:04,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 18 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:04,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1180 states and 3385 transitions. [2022-03-01 17:37:04,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:04,162 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:04,162 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:04,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (390)] Ended with exit code 0 [2022-03-01 17:37:04,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2022-03-01 17:37:04,371 INFO L402 AbstractCegarLoop]: === Iteration 400 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:04,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:04,371 INFO L85 PathProgramCache]: Analyzing trace with hash -200351757, now seen corresponding path program 386 times [2022-03-01 17:37:04,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:04,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003746278] [2022-03-01 17:37:04,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:04,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:04,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:04,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:04,472 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:04,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003746278] [2022-03-01 17:37:04,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003746278] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:04,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548668514] [2022-03-01 17:37:04,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:04,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:04,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:04,474 INFO L229 MonitoredProcess]: Starting monitored process 391 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:04,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Waiting until timeout for monitored process [2022-03-01 17:37:04,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:04,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:04,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:04,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:04,629 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:04,630 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:04,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:04,631 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:04,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:04,789 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:04,790 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:04,792 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:04,825 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:04,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548668514] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:04,825 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:04,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:37:04,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890093205] [2022-03-01 17:37:04,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:04,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:04,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:04,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:04,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:04,826 INFO L87 Difference]: Start difference. First operand 1180 states and 3385 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:05,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:05,383 INFO L93 Difference]: Finished difference Result 1396 states and 3815 transitions. [2022-03-01 17:37:05,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:37:05,383 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:05,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:05,385 INFO L225 Difference]: With dead ends: 1396 [2022-03-01 17:37:05,385 INFO L226 Difference]: Without dead ends: 1395 [2022-03-01 17:37:05,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=946, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:37:05,385 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 111 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:05,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 128 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:05,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1395 states. [2022-03-01 17:37:05,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1395 to 1207. [2022-03-01 17:37:05,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1207 states, 1206 states have (on average 2.887230514096186) internal successors, (3482), 1206 states have internal predecessors, (3482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:05,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1207 states to 1207 states and 3482 transitions. [2022-03-01 17:37:05,399 INFO L78 Accepts]: Start accepts. Automaton has 1207 states and 3482 transitions. Word has length 17 [2022-03-01 17:37:05,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:05,399 INFO L470 AbstractCegarLoop]: Abstraction has 1207 states and 3482 transitions. [2022-03-01 17:37:05,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:05,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1207 states and 3482 transitions. [2022-03-01 17:37:05,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:05,401 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:05,401 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:05,416 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (391)] Ended with exit code 0 [2022-03-01 17:37:05,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2022-03-01 17:37:05,601 INFO L402 AbstractCegarLoop]: === Iteration 401 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:05,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:05,601 INFO L85 PathProgramCache]: Analyzing trace with hash 601264471, now seen corresponding path program 387 times [2022-03-01 17:37:05,601 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:05,601 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501861129] [2022-03-01 17:37:05,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:05,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:05,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:05,696 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:05,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501861129] [2022-03-01 17:37:05,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501861129] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:05,697 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133673117] [2022-03-01 17:37:05,697 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:37:05,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:05,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:05,698 INFO L229 MonitoredProcess]: Starting monitored process 392 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:05,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Waiting until timeout for monitored process [2022-03-01 17:37:05,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:37:05,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:05,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:05,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:05,853 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:05,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:05,855 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:05,856 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:05,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:05,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:06,030 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:06,030 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:06,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:06,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:06,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133673117] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:06,055 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:06,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:37:06,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554485711] [2022-03-01 17:37:06,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:06,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:06,055 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:06,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:06,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:06,056 INFO L87 Difference]: Start difference. First operand 1207 states and 3482 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:07,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:07,602 INFO L93 Difference]: Finished difference Result 1520 states and 4102 transitions. [2022-03-01 17:37:07,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-03-01 17:37:07,602 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:07,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:07,604 INFO L225 Difference]: With dead ends: 1520 [2022-03-01 17:37:07,604 INFO L226 Difference]: Without dead ends: 1509 [2022-03-01 17:37:07,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1383 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=522, Invalid=3900, Unknown=0, NotChecked=0, Total=4422 [2022-03-01 17:37:07,605 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 200 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:07,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [200 Valid, 94 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 796 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:37:07,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2022-03-01 17:37:07,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 1248. [2022-03-01 17:37:07,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.8957497995188453) internal successors, (3611), 1247 states have internal predecessors, (3611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:07,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3611 transitions. [2022-03-01 17:37:07,619 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3611 transitions. Word has length 17 [2022-03-01 17:37:07,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:07,619 INFO L470 AbstractCegarLoop]: Abstraction has 1248 states and 3611 transitions. [2022-03-01 17:37:07,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:07,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3611 transitions. [2022-03-01 17:37:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:07,620 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:07,620 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:07,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (392)] Ended with exit code 0 [2022-03-01 17:37:07,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2022-03-01 17:37:07,821 INFO L402 AbstractCegarLoop]: === Iteration 402 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:07,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:07,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1975359119, now seen corresponding path program 388 times [2022-03-01 17:37:07,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:07,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777325368] [2022-03-01 17:37:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:07,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:07,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:07,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:07,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777325368] [2022-03-01 17:37:07,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777325368] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:07,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218305418] [2022-03-01 17:37:07,924 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:07,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:07,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:07,925 INFO L229 MonitoredProcess]: Starting monitored process 393 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:07,926 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Waiting until timeout for monitored process [2022-03-01 17:37:07,949 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:07,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:07,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:07,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:08,079 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:08,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:08,081 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:08,081 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:08,149 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:08,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:08,244 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:08,244 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:08,246 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:08,268 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:08,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218305418] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:08,268 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:08,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:37:08,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938344037] [2022-03-01 17:37:08,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:08,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:08,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:08,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:08,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:08,269 INFO L87 Difference]: Start difference. First operand 1248 states and 3611 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:09,341 INFO L93 Difference]: Finished difference Result 1517 states and 4073 transitions. [2022-03-01 17:37:09,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:37:09,341 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:09,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:09,344 INFO L225 Difference]: With dead ends: 1517 [2022-03-01 17:37:09,344 INFO L226 Difference]: Without dead ends: 1515 [2022-03-01 17:37:09,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 619 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=320, Invalid=2032, Unknown=0, NotChecked=0, Total=2352 [2022-03-01 17:37:09,344 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:09,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 132 Invalid, 874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:09,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2022-03-01 17:37:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1218. [2022-03-01 17:37:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1218 states, 1217 states have (on average 2.876746096959737) internal successors, (3501), 1217 states have internal predecessors, (3501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:09,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1218 states to 1218 states and 3501 transitions. [2022-03-01 17:37:09,364 INFO L78 Accepts]: Start accepts. Automaton has 1218 states and 3501 transitions. Word has length 17 [2022-03-01 17:37:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:09,365 INFO L470 AbstractCegarLoop]: Abstraction has 1218 states and 3501 transitions. [2022-03-01 17:37:09,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:09,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1218 states and 3501 transitions. [2022-03-01 17:37:09,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:09,366 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:09,366 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:09,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (393)] Ended with exit code 0 [2022-03-01 17:37:09,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable401 [2022-03-01 17:37:09,566 INFO L402 AbstractCegarLoop]: === Iteration 403 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:09,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:09,567 INFO L85 PathProgramCache]: Analyzing trace with hash 608994869, now seen corresponding path program 389 times [2022-03-01 17:37:09,567 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:09,567 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788941522] [2022-03-01 17:37:09,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:09,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:09,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:09,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:09,659 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:09,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788941522] [2022-03-01 17:37:09,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788941522] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:09,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151032474] [2022-03-01 17:37:09,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:09,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:09,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:09,660 INFO L229 MonitoredProcess]: Starting monitored process 394 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:09,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Waiting until timeout for monitored process [2022-03-01 17:37:09,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:37:09,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:09,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:09,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:09,840 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:09,840 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:09,842 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:09,843 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:37:09,846 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:09,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:37:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:09,874 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:09,974 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:09,975 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:09,976 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:09,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151032474] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:09,999 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:09,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:37:09,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618021407] [2022-03-01 17:37:09,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:10,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:10,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:10,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:10,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:10,000 INFO L87 Difference]: Start difference. First operand 1218 states and 3501 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:11,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:11,076 INFO L93 Difference]: Finished difference Result 1444 states and 3910 transitions. [2022-03-01 17:37:11,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-01 17:37:11,076 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:11,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:11,078 INFO L225 Difference]: With dead ends: 1444 [2022-03-01 17:37:11,078 INFO L226 Difference]: Without dead ends: 1444 [2022-03-01 17:37:11,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=310, Invalid=1946, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:37:11,078 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 119 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 990 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 990 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:11,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 138 Invalid, 1037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 990 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:37:11,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2022-03-01 17:37:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 1195. [2022-03-01 17:37:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.8726968174204357) internal successors, (3430), 1194 states have internal predecessors, (3430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:11,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3430 transitions. [2022-03-01 17:37:11,093 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3430 transitions. Word has length 17 [2022-03-01 17:37:11,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:11,093 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 3430 transitions. [2022-03-01 17:37:11,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:11,093 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3430 transitions. [2022-03-01 17:37:11,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:11,094 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:11,094 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:11,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (394)] Ended with exit code 0 [2022-03-01 17:37:11,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2022-03-01 17:37:11,295 INFO L402 AbstractCegarLoop]: === Iteration 404 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:11,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:11,295 INFO L85 PathProgramCache]: Analyzing trace with hash -880410127, now seen corresponding path program 390 times [2022-03-01 17:37:11,295 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:11,295 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646172093] [2022-03-01 17:37:11,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:11,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:11,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:11,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:11,399 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:11,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646172093] [2022-03-01 17:37:11,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646172093] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:11,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551823752] [2022-03-01 17:37:11,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:11,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:11,400 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:11,400 INFO L229 MonitoredProcess]: Starting monitored process 395 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:11,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Waiting until timeout for monitored process [2022-03-01 17:37:11,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:37:11,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:11,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:11,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:11,571 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:11,572 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:11,574 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:11,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:37:11,577 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:11,578 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:37:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:11,605 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:11,690 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:11,691 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:11,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:11,715 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:11,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551823752] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:11,715 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:11,715 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2022-03-01 17:37:11,715 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043216929] [2022-03-01 17:37:11,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:11,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:37:11,715 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:11,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:37:11,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:37:11,715 INFO L87 Difference]: Start difference. First operand 1195 states and 3430 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:12,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:12,138 INFO L93 Difference]: Finished difference Result 1358 states and 3730 transitions. [2022-03-01 17:37:12,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:37:12,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:12,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:12,146 INFO L225 Difference]: With dead ends: 1358 [2022-03-01 17:37:12,147 INFO L226 Difference]: Without dead ends: 1358 [2022-03-01 17:37:12,147 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2022-03-01 17:37:12,147 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 857 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 857 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:12,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 146 Invalid, 873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 857 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:12,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1358 states. [2022-03-01 17:37:12,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1358 to 1186. [2022-03-01 17:37:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 1185 states have (on average 2.8675105485232066) internal successors, (3398), 1185 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 3398 transitions. [2022-03-01 17:37:12,159 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 3398 transitions. Word has length 17 [2022-03-01 17:37:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:12,159 INFO L470 AbstractCegarLoop]: Abstraction has 1186 states and 3398 transitions. [2022-03-01 17:37:12,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 3398 transitions. [2022-03-01 17:37:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:12,161 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:12,161 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:12,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (395)] Ended with exit code 0 [2022-03-01 17:37:12,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,395 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:12,361 INFO L402 AbstractCegarLoop]: === Iteration 405 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:12,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:12,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1644528931, now seen corresponding path program 391 times [2022-03-01 17:37:12,362 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:12,362 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207644558] [2022-03-01 17:37:12,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:12,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:12,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:12,482 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:12,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207644558] [2022-03-01 17:37:12,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207644558] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:12,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810741096] [2022-03-01 17:37:12,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:12,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:12,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:12,483 INFO L229 MonitoredProcess]: Starting monitored process 396 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:12,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Waiting until timeout for monitored process [2022-03-01 17:37:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:12,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:12,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:12,691 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:12,692 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:12,694 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:12,694 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:37:12,719 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:12,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:12,812 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:12,812 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:12,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:12,833 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810741096] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:12,833 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:12,833 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:37:12,833 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908773022] [2022-03-01 17:37:12,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:12,833 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:12,833 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:12,833 INFO L87 Difference]: Start difference. First operand 1186 states and 3398 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:13,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:13,081 INFO L93 Difference]: Finished difference Result 1351 states and 3743 transitions. [2022-03-01 17:37:13,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:37:13,081 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:13,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:13,083 INFO L225 Difference]: With dead ends: 1351 [2022-03-01 17:37:13,083 INFO L226 Difference]: Without dead ends: 1351 [2022-03-01 17:37:13,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:37:13,083 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 59 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:13,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 188 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 538 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2022-03-01 17:37:13,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-03-01 17:37:13,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1238. [2022-03-01 17:37:13,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.890864995957963) internal successors, (3576), 1237 states have internal predecessors, (3576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:13,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3576 transitions. [2022-03-01 17:37:13,097 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3576 transitions. Word has length 17 [2022-03-01 17:37:13,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:13,097 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 3576 transitions. [2022-03-01 17:37:13,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:13,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3576 transitions. [2022-03-01 17:37:13,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:13,098 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:13,098 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:13,114 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (396)] Ended with exit code 0 [2022-03-01 17:37:13,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable404,396 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:13,299 INFO L402 AbstractCegarLoop]: === Iteration 406 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:13,299 INFO L85 PathProgramCache]: Analyzing trace with hash 416330871, now seen corresponding path program 392 times [2022-03-01 17:37:13,299 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:13,299 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261774525] [2022-03-01 17:37:13,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:13,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:13,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:13,405 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:13,406 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:13,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261774525] [2022-03-01 17:37:13,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261774525] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:13,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832663217] [2022-03-01 17:37:13,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:13,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:13,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:13,407 INFO L229 MonitoredProcess]: Starting monitored process 397 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:13,407 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Waiting until timeout for monitored process [2022-03-01 17:37:13,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:13,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:13,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:13,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:13,619 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:13,620 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:13,622 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:13,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:37:13,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:13,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:13,744 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:13,744 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:13,745 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:13,767 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832663217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:13,767 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:13,767 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:37:13,767 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003916376] [2022-03-01 17:37:13,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:13,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:13,768 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:13,768 INFO L87 Difference]: Start difference. First operand 1238 states and 3576 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:14,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:14,043 INFO L93 Difference]: Finished difference Result 1364 states and 3799 transitions. [2022-03-01 17:37:14,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-03-01 17:37:14,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:14,046 INFO L225 Difference]: With dead ends: 1364 [2022-03-01 17:37:14,046 INFO L226 Difference]: Without dead ends: 1364 [2022-03-01 17:37:14,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:37:14,046 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 61 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 733 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:14,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 174 Invalid, 733 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 588 Invalid, 0 Unknown, 138 Unchecked, 0.2s Time] [2022-03-01 17:37:14,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2022-03-01 17:37:14,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1239. [2022-03-01 17:37:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 2.892568659127625) internal successors, (3581), 1238 states have internal predecessors, (3581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3581 transitions. [2022-03-01 17:37:14,059 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3581 transitions. Word has length 17 [2022-03-01 17:37:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:14,059 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 3581 transitions. [2022-03-01 17:37:14,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:14,059 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3581 transitions. [2022-03-01 17:37:14,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:14,061 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:14,061 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:14,076 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (397)] Ended with exit code 0 [2022-03-01 17:37:14,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable405 [2022-03-01 17:37:14,261 INFO L402 AbstractCegarLoop]: === Iteration 407 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:14,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:14,261 INFO L85 PathProgramCache]: Analyzing trace with hash -713646343, now seen corresponding path program 393 times [2022-03-01 17:37:14,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:14,262 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302378623] [2022-03-01 17:37:14,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:14,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:14,362 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:14,362 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:14,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302378623] [2022-03-01 17:37:14,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302378623] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:14,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478766012] [2022-03-01 17:37:14,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:37:14,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:14,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:14,363 INFO L229 MonitoredProcess]: Starting monitored process 398 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:14,364 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Waiting until timeout for monitored process [2022-03-01 17:37:14,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:37:14,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:14,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:14,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:14,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:14,607 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:37:14,609 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:14,609 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:37:14,650 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:14,650 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:14,732 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:14,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:14,734 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:14,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:14,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478766012] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:14,757 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:14,757 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:37:14,757 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414699776] [2022-03-01 17:37:14,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:14,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:14,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:14,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:14,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:14,758 INFO L87 Difference]: Start difference. First operand 1239 states and 3581 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:15,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:15,184 INFO L93 Difference]: Finished difference Result 1328 states and 3701 transitions. [2022-03-01 17:37:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:37:15,184 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:15,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:15,186 INFO L225 Difference]: With dead ends: 1328 [2022-03-01 17:37:15,186 INFO L226 Difference]: Without dead ends: 1320 [2022-03-01 17:37:15,186 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:37:15,186 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 51 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:15,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 152 Invalid, 851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 721 Invalid, 0 Unknown, 123 Unchecked, 0.3s Time] [2022-03-01 17:37:15,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1320 states. [2022-03-01 17:37:15,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1320 to 1245. [2022-03-01 17:37:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 2.8842443729903535) internal successors, (3588), 1244 states have internal predecessors, (3588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:15,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3588 transitions. [2022-03-01 17:37:15,199 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3588 transitions. Word has length 17 [2022-03-01 17:37:15,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:15,199 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 3588 transitions. [2022-03-01 17:37:15,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:15,199 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3588 transitions. [2022-03-01 17:37:15,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:15,200 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:15,200 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:15,216 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (398)] Ended with exit code 0 [2022-03-01 17:37:15,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,398 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:15,401 INFO L402 AbstractCegarLoop]: === Iteration 408 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:15,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:15,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1489416251, now seen corresponding path program 394 times [2022-03-01 17:37:15,401 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:15,401 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934732567] [2022-03-01 17:37:15,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:15,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:15,505 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:15,505 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:15,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934732567] [2022-03-01 17:37:15,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934732567] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:15,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971217056] [2022-03-01 17:37:15,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:15,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:15,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:15,506 INFO L229 MonitoredProcess]: Starting monitored process 399 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:15,507 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Waiting until timeout for monitored process [2022-03-01 17:37:15,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:15,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:15,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:15,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:15,722 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:15,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:15,725 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:15,725 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:37:15,749 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:15,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:15,860 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:15,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:15,862 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:15,881 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971217056] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:15,881 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:15,881 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:37:15,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030196715] [2022-03-01 17:37:15,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:15,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:37:15,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:15,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:37:15,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:37:15,881 INFO L87 Difference]: Start difference. First operand 1245 states and 3588 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:16,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:16,600 INFO L93 Difference]: Finished difference Result 1422 states and 3887 transitions. [2022-03-01 17:37:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:37:16,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:16,603 INFO L225 Difference]: With dead ends: 1422 [2022-03-01 17:37:16,603 INFO L226 Difference]: Without dead ends: 1419 [2022-03-01 17:37:16,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=195, Invalid=1365, Unknown=0, NotChecked=0, Total=1560 [2022-03-01 17:37:16,603 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 115 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 839 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:16,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 176 Invalid, 839 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 680 Invalid, 0 Unknown, 138 Unchecked, 0.3s Time] [2022-03-01 17:37:16,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1419 states. [2022-03-01 17:37:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1419 to 1230. [2022-03-01 17:37:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 2.887713588283157) internal successors, (3549), 1229 states have internal predecessors, (3549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 3549 transitions. [2022-03-01 17:37:16,616 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 3549 transitions. Word has length 17 [2022-03-01 17:37:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:16,616 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 3549 transitions. [2022-03-01 17:37:16,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 3549 transitions. [2022-03-01 17:37:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:16,618 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:16,618 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:16,633 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (399)] Ended with exit code 0 [2022-03-01 17:37:16,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable407 [2022-03-01 17:37:16,818 INFO L402 AbstractCegarLoop]: === Iteration 409 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:16,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:16,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1251501921, now seen corresponding path program 395 times [2022-03-01 17:37:16,818 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:16,818 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764182183] [2022-03-01 17:37:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:16,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:16,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:16,924 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:16,924 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:16,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764182183] [2022-03-01 17:37:16,924 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764182183] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:16,924 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412382093] [2022-03-01 17:37:16,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:16,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:16,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:16,925 INFO L229 MonitoredProcess]: Starting monitored process 400 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:16,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Waiting until timeout for monitored process [2022-03-01 17:37:16,950 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:37:16,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:16,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:16,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:17,167 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:17,168 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:37:17,177 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:17,178 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:37:17,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:17,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:17,319 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:17,319 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:17,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:17,345 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:17,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412382093] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:17,345 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:17,345 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:37:17,345 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644904678] [2022-03-01 17:37:17,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:17,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:37:17,345 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:17,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:37:17,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:37:17,345 INFO L87 Difference]: Start difference. First operand 1230 states and 3549 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:17,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:17,914 INFO L93 Difference]: Finished difference Result 1324 states and 3673 transitions. [2022-03-01 17:37:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:37:17,915 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:17,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:17,916 INFO L225 Difference]: With dead ends: 1324 [2022-03-01 17:37:17,916 INFO L226 Difference]: Without dead ends: 1315 [2022-03-01 17:37:17,917 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=1175, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:37:17,917 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:17,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 168 Invalid, 835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 774 Invalid, 0 Unknown, 51 Unchecked, 0.3s Time] [2022-03-01 17:37:17,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-03-01 17:37:17,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1232. [2022-03-01 17:37:17,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.8822095857026806) internal successors, (3548), 1231 states have internal predecessors, (3548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:17,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3548 transitions. [2022-03-01 17:37:17,930 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3548 transitions. Word has length 17 [2022-03-01 17:37:17,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:17,931 INFO L470 AbstractCegarLoop]: Abstraction has 1232 states and 3548 transitions. [2022-03-01 17:37:17,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3548 transitions. [2022-03-01 17:37:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:17,932 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:17,932 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:17,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (400)] Ended with exit code 0 [2022-03-01 17:37:18,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable408,400 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:18,132 INFO L402 AbstractCegarLoop]: === Iteration 410 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:18,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:18,133 INFO L85 PathProgramCache]: Analyzing trace with hash 1729058589, now seen corresponding path program 396 times [2022-03-01 17:37:18,133 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:18,133 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794563816] [2022-03-01 17:37:18,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:18,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:18,240 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:18,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794563816] [2022-03-01 17:37:18,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794563816] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:18,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170387042] [2022-03-01 17:37:18,240 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:18,240 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:18,240 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:18,241 INFO L229 MonitoredProcess]: Starting monitored process 401 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:18,242 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Waiting until timeout for monitored process [2022-03-01 17:37:18,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:37:18,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:18,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:18,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:18,471 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:18,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:18,474 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:18,474 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:37:18,498 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:18,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:18,620 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:18,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:18,622 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:18,641 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170387042] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:18,641 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:18,641 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:37:18,641 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728071659] [2022-03-01 17:37:18,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:18,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:37:18,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:18,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:37:18,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:37:18,642 INFO L87 Difference]: Start difference. First operand 1232 states and 3548 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:19,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:19,664 INFO L93 Difference]: Finished difference Result 1473 states and 3986 transitions. [2022-03-01 17:37:19,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:37:19,665 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:19,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:19,667 INFO L225 Difference]: With dead ends: 1473 [2022-03-01 17:37:19,667 INFO L226 Difference]: Without dead ends: 1473 [2022-03-01 17:37:19,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 442 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=1691, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:37:19,667 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 123 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 793 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 793 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:19,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 140 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 793 Invalid, 0 Unknown, 71 Unchecked, 0.3s Time] [2022-03-01 17:37:19,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2022-03-01 17:37:19,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1238. [2022-03-01 17:37:19,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.889248181083266) internal successors, (3574), 1237 states have internal predecessors, (3574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3574 transitions. [2022-03-01 17:37:19,681 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3574 transitions. Word has length 17 [2022-03-01 17:37:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:19,681 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 3574 transitions. [2022-03-01 17:37:19,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:19,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3574 transitions. [2022-03-01 17:37:19,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:19,682 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:19,682 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:19,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (401)] Ended with exit code 0 [2022-03-01 17:37:19,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,401 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:19,883 INFO L402 AbstractCegarLoop]: === Iteration 411 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:19,883 INFO L85 PathProgramCache]: Analyzing trace with hash 809357881, now seen corresponding path program 397 times [2022-03-01 17:37:19,883 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:19,883 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630295144] [2022-03-01 17:37:19,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:19,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:19,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:19,995 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:19,995 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:19,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630295144] [2022-03-01 17:37:19,995 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630295144] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:19,995 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914570217] [2022-03-01 17:37:19,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:19,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:19,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:19,996 INFO L229 MonitoredProcess]: Starting monitored process 402 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:19,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Waiting until timeout for monitored process [2022-03-01 17:37:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:20,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:20,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:20,231 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:20,232 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:37:20,233 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:20,234 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:37:20,282 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:20,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:20,398 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:20,398 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:20,400 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:20,424 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:20,425 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914570217] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:20,425 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:20,425 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:37:20,425 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278789436] [2022-03-01 17:37:20,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:20,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:37:20,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:20,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:37:20,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:37:20,425 INFO L87 Difference]: Start difference. First operand 1238 states and 3574 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:21,001 INFO L93 Difference]: Finished difference Result 1309 states and 3671 transitions. [2022-03-01 17:37:21,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:37:21,001 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:21,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:21,003 INFO L225 Difference]: With dead ends: 1309 [2022-03-01 17:37:21,003 INFO L226 Difference]: Without dead ends: 1303 [2022-03-01 17:37:21,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=1108, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:37:21,003 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 74 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 713 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 713 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 16 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:21,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 102 Invalid, 743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 713 Invalid, 0 Unknown, 16 Unchecked, 0.3s Time] [2022-03-01 17:37:21,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-03-01 17:37:21,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1239. [2022-03-01 17:37:21,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 2.884491114701131) internal successors, (3571), 1238 states have internal predecessors, (3571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3571 transitions. [2022-03-01 17:37:21,017 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3571 transitions. Word has length 17 [2022-03-01 17:37:21,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:21,017 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 3571 transitions. [2022-03-01 17:37:21,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:21,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3571 transitions. [2022-03-01 17:37:21,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:21,018 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:21,018 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:21,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (402)] Ended with exit code 0 [2022-03-01 17:37:21,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable410,402 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:21,219 INFO L402 AbstractCegarLoop]: === Iteration 412 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:21,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:21,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1736788987, now seen corresponding path program 398 times [2022-03-01 17:37:21,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:21,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674139364] [2022-03-01 17:37:21,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:21,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:21,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:21,338 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:21,338 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:21,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674139364] [2022-03-01 17:37:21,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674139364] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:21,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246167720] [2022-03-01 17:37:21,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:21,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:21,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:21,339 INFO L229 MonitoredProcess]: Starting monitored process 403 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:21,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Waiting until timeout for monitored process [2022-03-01 17:37:21,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:21,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:21,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:21,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:21,525 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:21,526 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:21,527 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:21,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:21,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:21,729 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:21,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:21,731 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:21,750 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246167720] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:21,750 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:21,750 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:37:21,750 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263068903] [2022-03-01 17:37:21,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:21,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:37:21,750 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:21,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:37:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:37:21,751 INFO L87 Difference]: Start difference. First operand 1239 states and 3571 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:22,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:22,777 INFO L93 Difference]: Finished difference Result 1438 states and 3845 transitions. [2022-03-01 17:37:22,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:37:22,777 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:22,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:22,779 INFO L225 Difference]: With dead ends: 1438 [2022-03-01 17:37:22,779 INFO L226 Difference]: Without dead ends: 1437 [2022-03-01 17:37:22,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=1741, Unknown=0, NotChecked=0, Total=2070 [2022-03-01 17:37:22,779 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 717 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 717 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:22,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 142 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 717 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:22,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2022-03-01 17:37:22,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1197. [2022-03-01 17:37:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1197 states, 1196 states have (on average 2.858695652173913) internal successors, (3419), 1196 states have internal predecessors, (3419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1197 states to 1197 states and 3419 transitions. [2022-03-01 17:37:22,792 INFO L78 Accepts]: Start accepts. Automaton has 1197 states and 3419 transitions. Word has length 17 [2022-03-01 17:37:22,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:22,793 INFO L470 AbstractCegarLoop]: Abstraction has 1197 states and 3419 transitions. [2022-03-01 17:37:22,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:22,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1197 states and 3419 transitions. [2022-03-01 17:37:22,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:22,794 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:22,794 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:22,810 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (403)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:22,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2022-03-01 17:37:22,994 INFO L402 AbstractCegarLoop]: === Iteration 413 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:22,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:22,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1756562081, now seen corresponding path program 399 times [2022-03-01 17:37:22,995 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:22,995 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706540779] [2022-03-01 17:37:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:22,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:22,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:23,104 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:23,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706540779] [2022-03-01 17:37:23,105 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706540779] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:23,105 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297298881] [2022-03-01 17:37:23,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:37:23,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:23,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:23,106 INFO L229 MonitoredProcess]: Starting monitored process 404 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:23,106 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Waiting until timeout for monitored process [2022-03-01 17:37:23,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:37:23,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:23,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:23,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:23,291 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:23,292 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:23,293 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:23,294 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:23,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:23,483 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:23,483 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:23,485 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:23,509 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297298881] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:23,509 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:23,509 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:37:23,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203491123] [2022-03-01 17:37:23,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:23,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:37:23,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:23,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:37:23,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:37:23,510 INFO L87 Difference]: Start difference. First operand 1197 states and 3419 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:24,108 INFO L93 Difference]: Finished difference Result 1290 states and 3571 transitions. [2022-03-01 17:37:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:37:24,108 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:24,109 INFO L225 Difference]: With dead ends: 1290 [2022-03-01 17:37:24,110 INFO L226 Difference]: Without dead ends: 1285 [2022-03-01 17:37:24,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2022-03-01 17:37:24,110 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 115 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 743 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:24,110 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 104 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 743 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2022-03-01 17:37:24,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 1203. [2022-03-01 17:37:24,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 1202 states have (on average 2.8577371048252913) internal successors, (3435), 1202 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:24,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 3435 transitions. [2022-03-01 17:37:24,122 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 3435 transitions. Word has length 17 [2022-03-01 17:37:24,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:24,122 INFO L470 AbstractCegarLoop]: Abstraction has 1203 states and 3435 transitions. [2022-03-01 17:37:24,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:24,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 3435 transitions. [2022-03-01 17:37:24,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:24,123 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:24,123 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:24,138 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (404)] Ended with exit code 0 [2022-03-01 17:37:24,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2022-03-01 17:37:24,324 INFO L402 AbstractCegarLoop]: === Iteration 414 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:24,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:24,324 INFO L85 PathProgramCache]: Analyzing trace with hash -38218375, now seen corresponding path program 400 times [2022-03-01 17:37:24,324 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:24,324 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592411861] [2022-03-01 17:37:24,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:24,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:24,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:24,433 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:24,433 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:24,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592411861] [2022-03-01 17:37:24,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592411861] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:24,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589933587] [2022-03-01 17:37:24,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:24,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:24,434 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:24,435 INFO L229 MonitoredProcess]: Starting monitored process 405 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:24,435 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Waiting until timeout for monitored process [2022-03-01 17:37:24,458 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:24,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:24,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:24,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:24,621 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:24,621 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:24,623 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:24,623 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:24,690 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:24,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:24,802 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:24,802 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:24,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:24,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:24,827 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589933587] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:24,827 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:24,827 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:37:24,828 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007520898] [2022-03-01 17:37:24,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:24,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:37:24,828 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:24,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:37:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:37:24,828 INFO L87 Difference]: Start difference. First operand 1203 states and 3435 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:25,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:25,243 INFO L93 Difference]: Finished difference Result 1280 states and 3553 transitions. [2022-03-01 17:37:25,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:37:25,243 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:25,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:25,245 INFO L225 Difference]: With dead ends: 1280 [2022-03-01 17:37:25,245 INFO L226 Difference]: Without dead ends: 1280 [2022-03-01 17:37:25,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=700, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:37:25,245 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 61 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:25,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 124 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:25,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2022-03-01 17:37:25,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 1187. [2022-03-01 17:37:25,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1186 states have (on average 2.8566610455311974) internal successors, (3388), 1186 states have internal predecessors, (3388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:25,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 3388 transitions. [2022-03-01 17:37:25,264 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 3388 transitions. Word has length 17 [2022-03-01 17:37:25,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:25,264 INFO L470 AbstractCegarLoop]: Abstraction has 1187 states and 3388 transitions. [2022-03-01 17:37:25,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:25,265 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 3388 transitions. [2022-03-01 17:37:25,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:25,266 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:25,266 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:25,281 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (405)] Ended with exit code 0 [2022-03-01 17:37:25,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable413,405 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:25,466 INFO L402 AbstractCegarLoop]: === Iteration 415 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:25,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:25,467 INFO L85 PathProgramCache]: Analyzing trace with hash -2044748711, now seen corresponding path program 401 times [2022-03-01 17:37:25,467 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:25,467 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439785823] [2022-03-01 17:37:25,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:25,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:25,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:25,561 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:25,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439785823] [2022-03-01 17:37:25,561 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439785823] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:25,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716243777] [2022-03-01 17:37:25,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:25,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:25,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:25,562 INFO L229 MonitoredProcess]: Starting monitored process 406 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:25,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Waiting until timeout for monitored process [2022-03-01 17:37:25,586 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:37:25,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:25,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:25,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:25,726 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:25,726 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:25,728 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:25,728 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:25,799 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:25,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:25,889 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:25,890 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:25,891 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:25,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716243777] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:25,913 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:25,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:37:25,913 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899484423] [2022-03-01 17:37:25,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:25,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:25,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:25,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:25,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:25,914 INFO L87 Difference]: Start difference. First operand 1187 states and 3388 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:26,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:26,584 INFO L93 Difference]: Finished difference Result 1251 states and 3512 transitions. [2022-03-01 17:37:26,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:37:26,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:26,586 INFO L225 Difference]: With dead ends: 1251 [2022-03-01 17:37:26,586 INFO L226 Difference]: Without dead ends: 1247 [2022-03-01 17:37:26,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=1203, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:37:26,586 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 40 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:26,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 50 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:37:26,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1247 states. [2022-03-01 17:37:26,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1247 to 1183. [2022-03-01 17:37:26,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.8544839255499155) internal successors, (3374), 1182 states have internal predecessors, (3374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3374 transitions. [2022-03-01 17:37:26,606 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3374 transitions. Word has length 17 [2022-03-01 17:37:26,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:26,606 INFO L470 AbstractCegarLoop]: Abstraction has 1183 states and 3374 transitions. [2022-03-01 17:37:26,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:26,606 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3374 transitions. [2022-03-01 17:37:26,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:26,607 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:26,607 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:26,623 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (406)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:26,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2022-03-01 17:37:26,808 INFO L402 AbstractCegarLoop]: === Iteration 416 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:26,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:26,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1683195255, now seen corresponding path program 402 times [2022-03-01 17:37:26,808 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:26,808 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760714648] [2022-03-01 17:37:26,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:26,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:26,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:26,896 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:26,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760714648] [2022-03-01 17:37:26,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760714648] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:26,896 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274825921] [2022-03-01 17:37:26,896 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:26,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:26,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:26,897 INFO L229 MonitoredProcess]: Starting monitored process 407 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:26,897 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Waiting until timeout for monitored process [2022-03-01 17:37:26,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:37:26,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:26,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:27,093 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:27,093 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:27,097 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:27,097 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:37:27,123 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:27,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:27,209 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:27,210 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:27,211 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:27,233 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:27,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274825921] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:27,233 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:27,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:37:27,234 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655608601] [2022-03-01 17:37:27,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:27,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:37:27,234 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:27,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:37:27,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:37:27,234 INFO L87 Difference]: Start difference. First operand 1183 states and 3374 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:27,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:27,510 INFO L93 Difference]: Finished difference Result 1319 states and 3641 transitions. [2022-03-01 17:37:27,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-03-01 17:37:27,510 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:27,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:27,512 INFO L225 Difference]: With dead ends: 1319 [2022-03-01 17:37:27,512 INFO L226 Difference]: Without dead ends: 1319 [2022-03-01 17:37:27,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:37:27,512 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 71 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:27,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 132 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 639 Invalid, 0 Unknown, 71 Unchecked, 0.2s Time] [2022-03-01 17:37:27,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2022-03-01 17:37:27,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 1199. [2022-03-01 17:37:27,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 2.8597662771285477) internal successors, (3426), 1198 states have internal predecessors, (3426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:27,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3426 transitions. [2022-03-01 17:37:27,524 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3426 transitions. Word has length 17 [2022-03-01 17:37:27,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:27,525 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 3426 transitions. [2022-03-01 17:37:27,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:27,525 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3426 transitions. [2022-03-01 17:37:27,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:27,526 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:27,526 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:27,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (407)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:27,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,407 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:27,726 INFO L402 AbstractCegarLoop]: === Iteration 417 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:27,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:27,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1057722917, now seen corresponding path program 403 times [2022-03-01 17:37:27,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:27,727 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465906123] [2022-03-01 17:37:27,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:27,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:27,814 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:27,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465906123] [2022-03-01 17:37:27,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465906123] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:27,814 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874653074] [2022-03-01 17:37:27,814 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:27,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:27,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:27,815 INFO L229 MonitoredProcess]: Starting monitored process 408 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:27,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Waiting until timeout for monitored process [2022-03-01 17:37:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:27,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:27,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:28,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:28,032 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:37:28,034 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:28,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:37:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:28,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:28,149 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:28,150 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:28,152 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:28,178 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:28,178 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874653074] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:28,178 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:28,178 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 19 [2022-03-01 17:37:28,178 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843257220] [2022-03-01 17:37:28,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:28,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:37:28,179 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:28,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:37:28,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:37:28,179 INFO L87 Difference]: Start difference. First operand 1199 states and 3426 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:28,597 INFO L93 Difference]: Finished difference Result 1262 states and 3513 transitions. [2022-03-01 17:37:28,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:37:28,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:28,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:28,599 INFO L225 Difference]: With dead ends: 1262 [2022-03-01 17:37:28,599 INFO L226 Difference]: Without dead ends: 1256 [2022-03-01 17:37:28,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:37:28,599 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:28,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 118 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 729 Invalid, 0 Unknown, 19 Unchecked, 0.3s Time] [2022-03-01 17:37:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1256 states. [2022-03-01 17:37:28,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1256 to 1200. [2022-03-01 17:37:28,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1200 states, 1199 states have (on average 2.85487906588824) internal successors, (3423), 1199 states have internal predecessors, (3423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:28,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1200 states to 1200 states and 3423 transitions. [2022-03-01 17:37:28,611 INFO L78 Accepts]: Start accepts. Automaton has 1200 states and 3423 transitions. Word has length 17 [2022-03-01 17:37:28,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:28,611 INFO L470 AbstractCegarLoop]: Abstraction has 1200 states and 3423 transitions. [2022-03-01 17:37:28,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:28,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1200 states and 3423 transitions. [2022-03-01 17:37:28,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:28,613 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:28,613 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:28,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (408)] Ended with exit code 0 [2022-03-01 17:37:28,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,408 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:28,835 INFO L402 AbstractCegarLoop]: === Iteration 418 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:28,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1922837593, now seen corresponding path program 404 times [2022-03-01 17:37:28,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:28,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838200038] [2022-03-01 17:37:28,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:28,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:28,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:28,927 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:28,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838200038] [2022-03-01 17:37:28,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838200038] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:28,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104006597] [2022-03-01 17:37:28,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:28,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:28,927 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:28,928 INFO L229 MonitoredProcess]: Starting monitored process 409 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:28,928 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Waiting until timeout for monitored process [2022-03-01 17:37:28,951 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:28,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:28,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:28,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:29,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:29,129 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:29,131 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:29,131 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:37:29,156 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:29,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:29,263 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:29,263 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:29,264 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:29,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104006597] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:29,287 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:29,287 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:37:29,287 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056115472] [2022-03-01 17:37:29,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:29,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:29,287 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:29,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:29,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:29,287 INFO L87 Difference]: Start difference. First operand 1200 states and 3423 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:29,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:29,977 INFO L93 Difference]: Finished difference Result 1355 states and 3710 transitions. [2022-03-01 17:37:29,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:37:29,977 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:29,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:29,979 INFO L225 Difference]: With dead ends: 1355 [2022-03-01 17:37:29,979 INFO L226 Difference]: Without dead ends: 1352 [2022-03-01 17:37:29,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2022-03-01 17:37:29,979 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 65 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 61 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:29,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 112 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 730 Invalid, 0 Unknown, 61 Unchecked, 0.3s Time] [2022-03-01 17:37:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1352 states. [2022-03-01 17:37:29,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1352 to 1198. [2022-03-01 17:37:29,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1198 states, 1197 states have (on average 2.854636591478697) internal successors, (3417), 1197 states have internal predecessors, (3417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1198 states to 1198 states and 3417 transitions. [2022-03-01 17:37:29,992 INFO L78 Accepts]: Start accepts. Automaton has 1198 states and 3417 transitions. Word has length 17 [2022-03-01 17:37:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:29,992 INFO L470 AbstractCegarLoop]: Abstraction has 1198 states and 3417 transitions. [2022-03-01 17:37:29,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1198 states and 3417 transitions. [2022-03-01 17:37:29,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:29,993 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:29,993 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:30,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (409)] Ended with exit code 0 [2022-03-01 17:37:30,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable417 [2022-03-01 17:37:30,194 INFO L402 AbstractCegarLoop]: === Iteration 419 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:30,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:30,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1003136885, now seen corresponding path program 405 times [2022-03-01 17:37:30,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:30,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337721141] [2022-03-01 17:37:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:30,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:30,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:30,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:30,286 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:30,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337721141] [2022-03-01 17:37:30,286 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337721141] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:30,286 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770557284] [2022-03-01 17:37:30,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:37:30,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:30,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:30,287 INFO L229 MonitoredProcess]: Starting monitored process 410 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:30,288 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Waiting until timeout for monitored process [2022-03-01 17:37:30,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:37:30,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:30,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:30,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:30,500 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:30,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:37:30,502 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:30,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:37:30,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:30,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:30,640 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:30,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:30,643 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:30,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:30,669 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770557284] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:30,669 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:30,669 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 20 [2022-03-01 17:37:30,669 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330806643] [2022-03-01 17:37:30,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:30,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:30,670 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:30,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:30,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:30,670 INFO L87 Difference]: Start difference. First operand 1198 states and 3417 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:31,138 INFO L93 Difference]: Finished difference Result 1256 states and 3498 transitions. [2022-03-01 17:37:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-01 17:37:31,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:31,140 INFO L225 Difference]: With dead ends: 1256 [2022-03-01 17:37:31,140 INFO L226 Difference]: Without dead ends: 1251 [2022-03-01 17:37:31,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:37:31,141 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 63 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:31,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 104 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 685 Invalid, 0 Unknown, 46 Unchecked, 0.3s Time] [2022-03-01 17:37:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-03-01 17:37:31,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1199. [2022-03-01 17:37:31,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1199 states, 1198 states have (on average 2.850584307178631) internal successors, (3415), 1198 states have internal predecessors, (3415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:31,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1199 states to 1199 states and 3415 transitions. [2022-03-01 17:37:31,153 INFO L78 Accepts]: Start accepts. Automaton has 1199 states and 3415 transitions. Word has length 17 [2022-03-01 17:37:31,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:31,153 INFO L470 AbstractCegarLoop]: Abstraction has 1199 states and 3415 transitions. [2022-03-01 17:37:31,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:31,153 INFO L276 IsEmpty]: Start isEmpty. Operand 1199 states and 3415 transitions. [2022-03-01 17:37:31,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:31,154 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:31,154 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:31,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (410)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:31,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable418 [2022-03-01 17:37:31,355 INFO L402 AbstractCegarLoop]: === Iteration 420 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:31,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1930567991, now seen corresponding path program 406 times [2022-03-01 17:37:31,355 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:31,355 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290899411] [2022-03-01 17:37:31,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:31,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:31,448 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:31,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290899411] [2022-03-01 17:37:31,448 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290899411] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:31,448 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48032145] [2022-03-01 17:37:31,448 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:31,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:31,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:31,449 INFO L229 MonitoredProcess]: Starting monitored process 411 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:31,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Waiting until timeout for monitored process [2022-03-01 17:37:31,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:31,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:31,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:31,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:31,615 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:31,616 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:31,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:31,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:31,684 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:31,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:31,794 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:31,794 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:31,796 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:31,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48032145] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:31,818 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:31,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-03-01 17:37:31,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612608317] [2022-03-01 17:37:31,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:31,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:37:31,818 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:31,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:37:31,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:37:31,818 INFO L87 Difference]: Start difference. First operand 1199 states and 3415 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:32,552 INFO L93 Difference]: Finished difference Result 1441 states and 3841 transitions. [2022-03-01 17:37:32,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-03-01 17:37:32,552 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:32,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:32,554 INFO L225 Difference]: With dead ends: 1441 [2022-03-01 17:37:32,554 INFO L226 Difference]: Without dead ends: 1437 [2022-03-01 17:37:32,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=220, Invalid=1262, Unknown=0, NotChecked=0, Total=1482 [2022-03-01 17:37:32,554 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 194 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:32,554 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 122 Invalid, 772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1437 states. [2022-03-01 17:37:32,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1437 to 1194. [2022-03-01 17:37:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 2.848281642917016) internal successors, (3398), 1193 states have internal predecessors, (3398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 3398 transitions. [2022-03-01 17:37:32,568 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 3398 transitions. Word has length 17 [2022-03-01 17:37:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:32,568 INFO L470 AbstractCegarLoop]: Abstraction has 1194 states and 3398 transitions. [2022-03-01 17:37:32,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 3398 transitions. [2022-03-01 17:37:32,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:32,569 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:32,569 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:32,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (411)] Ended with exit code 0 [2022-03-01 17:37:32,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,411 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:32,769 INFO L402 AbstractCegarLoop]: === Iteration 421 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:32,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:32,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1562783077, now seen corresponding path program 407 times [2022-03-01 17:37:32,770 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:32,770 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671332338] [2022-03-01 17:37:32,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:32,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:32,863 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:32,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671332338] [2022-03-01 17:37:32,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671332338] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:32,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890656188] [2022-03-01 17:37:32,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:32,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:32,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:32,865 INFO L229 MonitoredProcess]: Starting monitored process 412 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:32,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Waiting until timeout for monitored process [2022-03-01 17:37:32,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:37:32,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:32,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:32,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:33,030 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:33,031 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:33,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:33,033 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:33,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:33,110 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:33,214 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:33,214 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:33,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:33,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:33,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890656188] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:33,249 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:33,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-03-01 17:37:33,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319860391] [2022-03-01 17:37:33,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:33,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:37:33,249 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:33,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:37:33,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:37:33,250 INFO L87 Difference]: Start difference. First operand 1194 states and 3398 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:33,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:33,853 INFO L93 Difference]: Finished difference Result 1320 states and 3605 transitions. [2022-03-01 17:37:33,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-01 17:37:33,853 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:33,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:33,855 INFO L225 Difference]: With dead ends: 1320 [2022-03-01 17:37:33,855 INFO L226 Difference]: Without dead ends: 1315 [2022-03-01 17:37:33,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=1216, Unknown=0, NotChecked=0, Total=1406 [2022-03-01 17:37:33,855 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 157 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:33,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 94 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:33,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1315 states. [2022-03-01 17:37:33,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1315 to 1204. [2022-03-01 17:37:33,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1204 states, 1203 states have (on average 2.8503740648379052) internal successors, (3429), 1203 states have internal predecessors, (3429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1204 states to 1204 states and 3429 transitions. [2022-03-01 17:37:33,868 INFO L78 Accepts]: Start accepts. Automaton has 1204 states and 3429 transitions. Word has length 17 [2022-03-01 17:37:33,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:33,868 INFO L470 AbstractCegarLoop]: Abstraction has 1204 states and 3429 transitions. [2022-03-01 17:37:33,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:33,868 INFO L276 IsEmpty]: Start isEmpty. Operand 1204 states and 3429 transitions. [2022-03-01 17:37:33,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:33,870 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:33,870 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:33,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (412)] Ended with exit code 0 [2022-03-01 17:37:34,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable420 [2022-03-01 17:37:34,071 INFO L402 AbstractCegarLoop]: === Iteration 422 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:34,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:34,071 INFO L85 PathProgramCache]: Analyzing trace with hash 155560629, now seen corresponding path program 408 times [2022-03-01 17:37:34,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:34,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233258381] [2022-03-01 17:37:34,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:34,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:34,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:34,164 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:34,164 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:34,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233258381] [2022-03-01 17:37:34,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233258381] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:34,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942106446] [2022-03-01 17:37:34,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:34,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:34,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:34,165 INFO L229 MonitoredProcess]: Starting monitored process 413 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:34,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Waiting until timeout for monitored process [2022-03-01 17:37:34,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:37:34,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:34,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:34,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:34,331 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:34,331 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:34,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:34,333 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:34,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:34,500 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:34,500 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:34,502 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:34,529 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:34,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942106446] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:34,529 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:34,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 10] total 21 [2022-03-01 17:37:34,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964110360] [2022-03-01 17:37:34,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:34,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:37:34,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:34,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:37:34,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:37:34,529 INFO L87 Difference]: Start difference. First operand 1204 states and 3429 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:34,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:34,929 INFO L93 Difference]: Finished difference Result 1293 states and 3566 transitions. [2022-03-01 17:37:34,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:37:34,930 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:34,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:34,931 INFO L225 Difference]: With dead ends: 1293 [2022-03-01 17:37:34,931 INFO L226 Difference]: Without dead ends: 1293 [2022-03-01 17:37:34,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-03-01 17:37:34,931 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 88 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:34,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 130 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 699 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:34,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1293 states. [2022-03-01 17:37:34,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1293 to 1195. [2022-03-01 17:37:34,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1195 states, 1194 states have (on average 2.842546063651591) internal successors, (3394), 1194 states have internal predecessors, (3394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1195 states to 1195 states and 3394 transitions. [2022-03-01 17:37:34,943 INFO L78 Accepts]: Start accepts. Automaton has 1195 states and 3394 transitions. Word has length 17 [2022-03-01 17:37:34,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:34,943 INFO L470 AbstractCegarLoop]: Abstraction has 1195 states and 3394 transitions. [2022-03-01 17:37:34,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1195 states and 3394 transitions. [2022-03-01 17:37:34,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:34,945 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:34,945 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:34,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (413)] Ended with exit code 0 [2022-03-01 17:37:35,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 413 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2022-03-01 17:37:35,145 INFO L402 AbstractCegarLoop]: === Iteration 423 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:35,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:35,145 INFO L85 PathProgramCache]: Analyzing trace with hash 316207261, now seen corresponding path program 409 times [2022-03-01 17:37:35,146 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:35,146 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058715079] [2022-03-01 17:37:35,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:35,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:35,223 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:35,223 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058715079] [2022-03-01 17:37:35,224 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058715079] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:35,224 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636941778] [2022-03-01 17:37:35,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:35,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:35,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:35,225 INFO L229 MonitoredProcess]: Starting monitored process 414 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:35,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Waiting until timeout for monitored process [2022-03-01 17:37:35,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:35,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:35,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:35,375 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:35,376 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:35,377 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:35,378 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:35,448 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:35,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:35,517 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:35,517 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:37:35,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:37:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:35,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636941778] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:35,542 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:35,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:37:35,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282134523] [2022-03-01 17:37:35,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:35,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:37:35,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:35,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:37:35,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:37:35,543 INFO L87 Difference]: Start difference. First operand 1195 states and 3394 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:35,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:35,949 INFO L93 Difference]: Finished difference Result 1250 states and 3510 transitions. [2022-03-01 17:37:35,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-03-01 17:37:35,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:35,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:35,951 INFO L225 Difference]: With dead ends: 1250 [2022-03-01 17:37:35,951 INFO L226 Difference]: Without dead ends: 1246 [2022-03-01 17:37:35,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:37:35,952 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 24 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:35,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 26 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:37:35,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2022-03-01 17:37:35,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1192. [2022-03-01 17:37:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1192 states, 1191 states have (on average 2.8387909319899243) internal successors, (3381), 1191 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 3381 transitions. [2022-03-01 17:37:35,970 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 3381 transitions. Word has length 17 [2022-03-01 17:37:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:35,970 INFO L470 AbstractCegarLoop]: Abstraction has 1192 states and 3381 transitions. [2022-03-01 17:37:35,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:35,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 3381 transitions. [2022-03-01 17:37:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:35,971 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:35,971 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:35,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (414)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:36,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2022-03-01 17:37:36,172 INFO L402 AbstractCegarLoop]: === Iteration 424 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:36,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:36,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1950236771, now seen corresponding path program 410 times [2022-03-01 17:37:36,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:36,173 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733089464] [2022-03-01 17:37:36,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:36,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:36,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:36,249 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:36,249 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:36,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733089464] [2022-03-01 17:37:36,249 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [733089464] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:36,249 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346399463] [2022-03-01 17:37:36,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:36,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:36,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:36,250 INFO L229 MonitoredProcess]: Starting monitored process 415 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:36,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Waiting until timeout for monitored process [2022-03-01 17:37:36,275 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:36,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:36,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:36,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:36,431 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:36,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:36,434 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:36,434 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 2 [2022-03-01 17:37:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:36,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:36,532 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:36,532 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:37:36,533 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:37:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:36,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346399463] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:36,558 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:36,558 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:37:36,558 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379203172] [2022-03-01 17:37:36,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:36,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:37:36,558 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:36,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:37:36,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:37:36,558 INFO L87 Difference]: Start difference. First operand 1192 states and 3381 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:36,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:36,795 INFO L93 Difference]: Finished difference Result 1337 states and 3706 transitions. [2022-03-01 17:37:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-01 17:37:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:36,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:36,797 INFO L225 Difference]: With dead ends: 1337 [2022-03-01 17:37:36,797 INFO L226 Difference]: Without dead ends: 1337 [2022-03-01 17:37:36,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:36,797 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 208 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:36,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 94 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 524 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-03-01 17:37:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1337 states. [2022-03-01 17:37:36,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1337 to 1231. [2022-03-01 17:37:36,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.8601626016260164) internal successors, (3518), 1230 states have internal predecessors, (3518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3518 transitions. [2022-03-01 17:37:36,809 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3518 transitions. Word has length 17 [2022-03-01 17:37:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:36,809 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 3518 transitions. [2022-03-01 17:37:36,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3518 transitions. [2022-03-01 17:37:36,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:36,811 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:36,811 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:36,826 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (415)] Ended with exit code 0 [2022-03-01 17:37:37,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable423,415 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:37,011 INFO L402 AbstractCegarLoop]: === Iteration 425 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:37,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:37,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1425029817, now seen corresponding path program 411 times [2022-03-01 17:37:37,011 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:37,011 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11384666] [2022-03-01 17:37:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:37,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:37,091 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:37,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11384666] [2022-03-01 17:37:37,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11384666] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:37,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736434253] [2022-03-01 17:37:37,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:37:37,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:37,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:37,092 INFO L229 MonitoredProcess]: Starting monitored process 416 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:37,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Waiting until timeout for monitored process [2022-03-01 17:37:37,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-03-01 17:37:37,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:37,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:37,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:37,289 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:37,289 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2022-03-01 17:37:37,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:37,305 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2022-03-01 17:37:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:37,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:37,414 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:37,414 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:37:37,416 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:37,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:37,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736434253] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:37,445 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:37,445 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:37:37,445 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771465577] [2022-03-01 17:37:37,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:37,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:37:37,445 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:37,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:37:37,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:37:37,445 INFO L87 Difference]: Start difference. First operand 1231 states and 3518 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:37,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:37,757 INFO L93 Difference]: Finished difference Result 1300 states and 3621 transitions. [2022-03-01 17:37:37,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:37:37,758 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:37,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:37,759 INFO L225 Difference]: With dead ends: 1300 [2022-03-01 17:37:37,759 INFO L226 Difference]: Without dead ends: 1296 [2022-03-01 17:37:37,760 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2022-03-01 17:37:37,760 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 46 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 36 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:37,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 82 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 513 Invalid, 0 Unknown, 36 Unchecked, 0.2s Time] [2022-03-01 17:37:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1296 states. [2022-03-01 17:37:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1296 to 1231. [2022-03-01 17:37:37,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.856910569105691) internal successors, (3514), 1230 states have internal predecessors, (3514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:37,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3514 transitions. [2022-03-01 17:37:37,772 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3514 transitions. Word has length 17 [2022-03-01 17:37:37,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:37,772 INFO L470 AbstractCegarLoop]: Abstraction has 1231 states and 3514 transitions. [2022-03-01 17:37:37,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:37,772 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3514 transitions. [2022-03-01 17:37:37,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:37,774 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:37,774 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:37,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (416)] Ended with exit code 0 [2022-03-01 17:37:37,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 416 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable424 [2022-03-01 17:37:37,974 INFO L402 AbstractCegarLoop]: === Iteration 426 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:37,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1942506373, now seen corresponding path program 412 times [2022-03-01 17:37:37,974 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:37,975 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577344075] [2022-03-01 17:37:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:37,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:38,053 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:38,053 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:38,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577344075] [2022-03-01 17:37:38,054 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577344075] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:38,054 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463821283] [2022-03-01 17:37:38,054 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:38,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:38,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:38,055 INFO L229 MonitoredProcess]: Starting monitored process 417 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:38,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Waiting until timeout for monitored process [2022-03-01 17:37:38,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:38,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:38,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:38,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:38,200 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:38,201 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:38,202 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:38,203 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:38,266 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:38,339 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:38,339 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 23 [2022-03-01 17:37:38,341 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-03-01 17:37:38,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:38,364 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463821283] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:38,364 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:38,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:37:38,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342416101] [2022-03-01 17:37:38,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:38,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:37:38,365 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:38,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:37:38,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:37:38,365 INFO L87 Difference]: Start difference. First operand 1231 states and 3514 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:38,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:38,696 INFO L93 Difference]: Finished difference Result 1392 states and 3799 transitions. [2022-03-01 17:37:38,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-01 17:37:38,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:38,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:38,698 INFO L225 Difference]: With dead ends: 1392 [2022-03-01 17:37:38,698 INFO L226 Difference]: Without dead ends: 1391 [2022-03-01 17:37:38,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:37:38,698 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 98 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:38,698 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 90 Invalid, 531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:37:38,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2022-03-01 17:37:38,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1236. [2022-03-01 17:37:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 1235 states have (on average 2.8591093117408906) internal successors, (3531), 1235 states have internal predecessors, (3531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:38,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 3531 transitions. [2022-03-01 17:37:38,711 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 3531 transitions. Word has length 17 [2022-03-01 17:37:38,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:38,711 INFO L470 AbstractCegarLoop]: Abstraction has 1236 states and 3531 transitions. [2022-03-01 17:37:38,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:38,711 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 3531 transitions. [2022-03-01 17:37:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:38,712 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:38,712 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:38,728 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (417)] Ended with exit code 0 [2022-03-01 17:37:38,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,417 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:38,913 INFO L402 AbstractCegarLoop]: === Iteration 427 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:38,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1140890145, now seen corresponding path program 413 times [2022-03-01 17:37:38,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:38,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650717934] [2022-03-01 17:37:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:38,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:38,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:39,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:39,000 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:39,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650717934] [2022-03-01 17:37:39,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650717934] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:39,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777866808] [2022-03-01 17:37:39,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:39,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:39,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:39,001 INFO L229 MonitoredProcess]: Starting monitored process 418 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:39,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Waiting until timeout for monitored process [2022-03-01 17:37:39,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-03-01 17:37:39,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:39,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:39,145 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:39,146 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:39,147 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:39,148 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:39,224 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:39,225 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:39,318 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:39,318 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:37:39,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:39,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777866808] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:39,349 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:39,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 19 [2022-03-01 17:37:39,349 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571070184] [2022-03-01 17:37:39,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:39,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:37:39,349 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:39,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:37:39,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:37:39,350 INFO L87 Difference]: Start difference. First operand 1236 states and 3531 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:39,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:39,987 INFO L93 Difference]: Finished difference Result 1355 states and 3730 transitions. [2022-03-01 17:37:39,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:37:39,987 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:39,989 INFO L225 Difference]: With dead ends: 1355 [2022-03-01 17:37:39,989 INFO L226 Difference]: Without dead ends: 1351 [2022-03-01 17:37:39,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:37:39,989 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 100 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 833 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 833 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:39,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 86 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 833 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:39,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2022-03-01 17:37:40,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1245. [2022-03-01 17:37:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1245 states, 1244 states have (on average 2.8617363344051445) internal successors, (3560), 1244 states have internal predecessors, (3560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1245 states to 1245 states and 3560 transitions. [2022-03-01 17:37:40,003 INFO L78 Accepts]: Start accepts. Automaton has 1245 states and 3560 transitions. Word has length 17 [2022-03-01 17:37:40,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:40,003 INFO L470 AbstractCegarLoop]: Abstraction has 1245 states and 3560 transitions. [2022-03-01 17:37:40,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:40,003 INFO L276 IsEmpty]: Start isEmpty. Operand 1245 states and 3560 transitions. [2022-03-01 17:37:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:40,005 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:40,005 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:40,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (418)] Ended with exit code 0 [2022-03-01 17:37:40,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 418 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable426 [2022-03-01 17:37:40,205 INFO L402 AbstractCegarLoop]: === Iteration 428 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:40,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:40,205 INFO L85 PathProgramCache]: Analyzing trace with hash 577453561, now seen corresponding path program 414 times [2022-03-01 17:37:40,205 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:40,206 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671338303] [2022-03-01 17:37:40,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:40,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:40,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:40,297 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:40,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671338303] [2022-03-01 17:37:40,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671338303] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:40,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76703104] [2022-03-01 17:37:40,297 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:40,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:40,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:40,298 INFO L229 MonitoredProcess]: Starting monitored process 419 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:40,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Waiting until timeout for monitored process [2022-03-01 17:37:40,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:37:40,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:40,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:40,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:40,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:40,444 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:40,445 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:40,445 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:40,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:40,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:40,588 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:40,588 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:37:40,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:40,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76703104] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:40,619 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:40,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 19 [2022-03-01 17:37:40,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608967441] [2022-03-01 17:37:40,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:40,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-01 17:37:40,619 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:40,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-01 17:37:40,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-03-01 17:37:40,619 INFO L87 Difference]: Start difference. First operand 1245 states and 3560 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:41,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:41,025 INFO L93 Difference]: Finished difference Result 1335 states and 3687 transitions. [2022-03-01 17:37:41,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:37:41,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:41,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:41,027 INFO L225 Difference]: With dead ends: 1335 [2022-03-01 17:37:41,027 INFO L226 Difference]: Without dead ends: 1335 [2022-03-01 17:37:41,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=458, Unknown=0, NotChecked=0, Total=552 [2022-03-01 17:37:41,028 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 46 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:41,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 116 Invalid, 665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:37:41,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1335 states. [2022-03-01 17:37:41,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1335 to 1221. [2022-03-01 17:37:41,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.8426229508196723) internal successors, (3468), 1220 states have internal predecessors, (3468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:41,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3468 transitions. [2022-03-01 17:37:41,050 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3468 transitions. Word has length 17 [2022-03-01 17:37:41,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:41,050 INFO L470 AbstractCegarLoop]: Abstraction has 1221 states and 3468 transitions. [2022-03-01 17:37:41,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:41,050 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3468 transitions. [2022-03-01 17:37:41,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:41,051 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:41,051 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:41,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (419)] Ended with exit code 0 [2022-03-01 17:37:41,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2022-03-01 17:37:41,252 INFO L402 AbstractCegarLoop]: === Iteration 429 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:41,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:41,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1824390183, now seen corresponding path program 415 times [2022-03-01 17:37:41,252 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:41,252 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749701843] [2022-03-01 17:37:41,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:41,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:41,333 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:41,333 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:41,333 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749701843] [2022-03-01 17:37:41,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749701843] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:41,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152349613] [2022-03-01 17:37:41,334 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:41,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:41,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:41,335 INFO L229 MonitoredProcess]: Starting monitored process 420 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:41,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Waiting until timeout for monitored process [2022-03-01 17:37:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:41,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:41,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:41,478 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:41,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:41,480 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:41,480 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:41,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:41,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:41,615 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:41,615 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:37:41,617 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:41,645 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152349613] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:41,645 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:41,645 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:37:41,645 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084001188] [2022-03-01 17:37:41,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:41,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:37:41,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:41,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:37:41,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:37:41,646 INFO L87 Difference]: Start difference. First operand 1221 states and 3468 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:42,149 INFO L93 Difference]: Finished difference Result 1375 states and 3751 transitions. [2022-03-01 17:37:42,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-01 17:37:42,149 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:42,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:42,151 INFO L225 Difference]: With dead ends: 1375 [2022-03-01 17:37:42,151 INFO L226 Difference]: Without dead ends: 1371 [2022-03-01 17:37:42,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=903, Unknown=0, NotChecked=0, Total=1056 [2022-03-01 17:37:42,151 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 111 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:42,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 84 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:37:42,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2022-03-01 17:37:42,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1242. [2022-03-01 17:37:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 2.85334407735697) internal successors, (3541), 1241 states have internal predecessors, (3541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 3541 transitions. [2022-03-01 17:37:42,164 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 3541 transitions. Word has length 17 [2022-03-01 17:37:42,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:42,164 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 3541 transitions. [2022-03-01 17:37:42,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 3541 transitions. [2022-03-01 17:37:42,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:42,165 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:42,165 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:42,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (420)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:42,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2022-03-01 17:37:42,366 INFO L402 AbstractCegarLoop]: === Iteration 430 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:42,366 INFO L85 PathProgramCache]: Analyzing trace with hash -95342849, now seen corresponding path program 416 times [2022-03-01 17:37:42,366 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:42,366 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095541668] [2022-03-01 17:37:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:42,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:42,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:42,445 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:42,445 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:42,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095541668] [2022-03-01 17:37:42,445 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095541668] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:42,445 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182561887] [2022-03-01 17:37:42,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:42,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:42,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:42,446 INFO L229 MonitoredProcess]: Starting monitored process 421 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:42,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Waiting until timeout for monitored process [2022-03-01 17:37:42,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:42,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:42,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:42,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:42,631 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:42,632 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 33 [2022-03-01 17:37:42,633 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:42,634 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 27 [2022-03-01 17:37:42,664 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:42,664 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:42,730 INFO L353 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2022-03-01 17:37:42,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 33 [2022-03-01 17:37:42,732 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:42,761 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-03-01 17:37:42,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182561887] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:42,761 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:42,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11, 9] total 18 [2022-03-01 17:37:42,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761051915] [2022-03-01 17:37:42,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:42,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-03-01 17:37:42,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:42,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-03-01 17:37:42,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-03-01 17:37:42,761 INFO L87 Difference]: Start difference. First operand 1242 states and 3541 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:43,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:43,210 INFO L93 Difference]: Finished difference Result 1318 states and 3658 transitions. [2022-03-01 17:37:43,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-01 17:37:43,210 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:43,212 INFO L225 Difference]: With dead ends: 1318 [2022-03-01 17:37:43,212 INFO L226 Difference]: Without dead ends: 1310 [2022-03-01 17:37:43,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-03-01 17:37:43,212 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 50 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:43,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 100 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:43,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2022-03-01 17:37:43,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1242. [2022-03-01 17:37:43,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1242 states, 1241 states have (on average 2.8485092667203866) internal successors, (3535), 1241 states have internal predecessors, (3535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:43,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1242 states to 1242 states and 3535 transitions. [2022-03-01 17:37:43,225 INFO L78 Accepts]: Start accepts. Automaton has 1242 states and 3535 transitions. Word has length 17 [2022-03-01 17:37:43,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:43,225 INFO L470 AbstractCegarLoop]: Abstraction has 1242 states and 3535 transitions. [2022-03-01 17:37:43,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:43,225 INFO L276 IsEmpty]: Start isEmpty. Operand 1242 states and 3535 transitions. [2022-03-01 17:37:43,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:43,226 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:43,226 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:43,242 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (421)] Ended with exit code 0 [2022-03-01 17:37:43,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable429,421 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:43,427 INFO L402 AbstractCegarLoop]: === Iteration 431 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:43,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:43,427 INFO L85 PathProgramCache]: Analyzing trace with hash 842049719, now seen corresponding path program 417 times [2022-03-01 17:37:43,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:43,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116620001] [2022-03-01 17:37:43,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:43,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:43,536 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:43,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116620001] [2022-03-01 17:37:43,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116620001] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:43,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431427115] [2022-03-01 17:37:43,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:37:43,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:43,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:43,537 INFO L229 MonitoredProcess]: Starting monitored process 422 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:43,538 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Waiting until timeout for monitored process [2022-03-01 17:37:43,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:37:43,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:43,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 24 conjunts are in the unsatisfiable core [2022-03-01 17:37:43,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:43,721 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:43,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:43,723 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:43,723 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:43,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:43,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:43,912 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:43,912 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 35 [2022-03-01 17:37:43,914 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2022-03-01 17:37:43,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:43,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431427115] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:43,937 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:43,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:37:43,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144130955] [2022-03-01 17:37:43,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:43,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:37:43,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:37:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:37:43,938 INFO L87 Difference]: Start difference. First operand 1242 states and 3535 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:44,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:44,334 INFO L93 Difference]: Finished difference Result 1439 states and 3909 transitions. [2022-03-01 17:37:44,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:37:44,334 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:44,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:44,336 INFO L225 Difference]: With dead ends: 1439 [2022-03-01 17:37:44,336 INFO L226 Difference]: Without dead ends: 1438 [2022-03-01 17:37:44,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2022-03-01 17:37:44,336 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 133 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:44,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 104 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:37:44,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1438 states. [2022-03-01 17:37:44,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1438 to 1261. [2022-03-01 17:37:44,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1261 states, 1260 states have (on average 2.8634920634920635) internal successors, (3608), 1260 states have internal predecessors, (3608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:44,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1261 states to 1261 states and 3608 transitions. [2022-03-01 17:37:44,350 INFO L78 Accepts]: Start accepts. Automaton has 1261 states and 3608 transitions. Word has length 17 [2022-03-01 17:37:44,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:44,350 INFO L470 AbstractCegarLoop]: Abstraction has 1261 states and 3608 transitions. [2022-03-01 17:37:44,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:44,350 INFO L276 IsEmpty]: Start isEmpty. Operand 1261 states and 3608 transitions. [2022-03-01 17:37:44,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:44,351 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:44,351 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:44,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (422)] Ended with exit code 0 [2022-03-01 17:37:44,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 422 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2022-03-01 17:37:44,552 INFO L402 AbstractCegarLoop]: === Iteration 432 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:44,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:44,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1643665947, now seen corresponding path program 418 times [2022-03-01 17:37:44,552 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:44,552 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847996335] [2022-03-01 17:37:44,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:44,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:44,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:44,662 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:44,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847996335] [2022-03-01 17:37:44,662 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847996335] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:44,662 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199774517] [2022-03-01 17:37:44,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:44,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:44,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:44,663 INFO L229 MonitoredProcess]: Starting monitored process 423 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:44,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Waiting until timeout for monitored process [2022-03-01 17:37:44,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:44,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:44,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:44,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:44,847 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:44,849 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:44,849 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:44,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:44,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:45,068 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:45,068 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:45,069 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:45,088 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:45,088 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199774517] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:45,088 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:45,088 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 23 [2022-03-01 17:37:45,088 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360428465] [2022-03-01 17:37:45,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:45,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-01 17:37:45,089 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:45,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-01 17:37:45,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=440, Unknown=0, NotChecked=0, Total=506 [2022-03-01 17:37:45,089 INFO L87 Difference]: Start difference. First operand 1261 states and 3608 transitions. Second operand has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:46,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:46,583 INFO L93 Difference]: Finished difference Result 1511 states and 4049 transitions. [2022-03-01 17:37:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-01 17:37:46,583 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:46,585 INFO L225 Difference]: With dead ends: 1511 [2022-03-01 17:37:46,586 INFO L226 Difference]: Without dead ends: 1500 [2022-03-01 17:37:46,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=496, Invalid=3044, Unknown=0, NotChecked=0, Total=3540 [2022-03-01 17:37:46,586 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 205 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:46,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 138 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:37:46,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1500 states. [2022-03-01 17:37:46,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1500 to 1292. [2022-03-01 17:37:46,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1292 states, 1291 states have (on average 2.8706429124709527) internal successors, (3706), 1291 states have internal predecessors, (3706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1292 states to 1292 states and 3706 transitions. [2022-03-01 17:37:46,607 INFO L78 Accepts]: Start accepts. Automaton has 1292 states and 3706 transitions. Word has length 17 [2022-03-01 17:37:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:46,607 INFO L470 AbstractCegarLoop]: Abstraction has 1292 states and 3706 transitions. [2022-03-01 17:37:46,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1292 states and 3706 transitions. [2022-03-01 17:37:46,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:46,609 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:46,609 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:46,625 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (423)] Ended with exit code 0 [2022-03-01 17:37:46,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable431 [2022-03-01 17:37:46,809 INFO L402 AbstractCegarLoop]: === Iteration 433 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:46,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:46,810 INFO L85 PathProgramCache]: Analyzing trace with hash -932957643, now seen corresponding path program 419 times [2022-03-01 17:37:46,810 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:46,810 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059345151] [2022-03-01 17:37:46,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:46,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:46,909 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:46,909 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:46,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059345151] [2022-03-01 17:37:46,909 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059345151] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:46,909 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552774722] [2022-03-01 17:37:46,909 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:37:46,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:46,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:46,910 INFO L229 MonitoredProcess]: Starting monitored process 424 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:46,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Waiting until timeout for monitored process [2022-03-01 17:37:46,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-03-01 17:37:46,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:46,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:46,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:47,099 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:47,100 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 35 [2022-03-01 17:37:47,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:47,102 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 27 [2022-03-01 17:37:47,168 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:47,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:47,282 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:47,283 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:47,284 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:47,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552774722] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:47,303 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:47,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:37:47,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027191451] [2022-03-01 17:37:47,303 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:47,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:37:47,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:47,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:37:47,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:37:47,304 INFO L87 Difference]: Start difference. First operand 1292 states and 3706 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:48,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:48,277 INFO L93 Difference]: Finished difference Result 1469 states and 3959 transitions. [2022-03-01 17:37:48,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-03-01 17:37:48,277 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:48,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:48,279 INFO L225 Difference]: With dead ends: 1469 [2022-03-01 17:37:48,279 INFO L226 Difference]: Without dead ends: 1467 [2022-03-01 17:37:48,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=284, Invalid=1696, Unknown=0, NotChecked=0, Total=1980 [2022-03-01 17:37:48,279 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 114 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 718 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:48,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 76 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 718 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-01 17:37:48,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2022-03-01 17:37:48,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1263. [2022-03-01 17:37:48,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1263 states, 1262 states have (on average 2.8438985736925515) internal successors, (3589), 1262 states have internal predecessors, (3589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:48,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1263 states to 1263 states and 3589 transitions. [2022-03-01 17:37:48,293 INFO L78 Accepts]: Start accepts. Automaton has 1263 states and 3589 transitions. Word has length 17 [2022-03-01 17:37:48,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:48,293 INFO L470 AbstractCegarLoop]: Abstraction has 1263 states and 3589 transitions. [2022-03-01 17:37:48,293 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1263 states and 3589 transitions. [2022-03-01 17:37:48,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:48,294 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:48,294 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:48,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (424)] Ended with exit code 0 [2022-03-01 17:37:48,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 424 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2022-03-01 17:37:48,495 INFO L402 AbstractCegarLoop]: === Iteration 434 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:48,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1651396345, now seen corresponding path program 420 times [2022-03-01 17:37:48,495 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:48,495 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641419339] [2022-03-01 17:37:48,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:48,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:48,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:48,592 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:48,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641419339] [2022-03-01 17:37:48,592 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641419339] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:48,592 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790196518] [2022-03-01 17:37:48,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:37:48,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:48,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:48,593 INFO L229 MonitoredProcess]: Starting monitored process 425 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:48,593 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Waiting until timeout for monitored process [2022-03-01 17:37:48,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-03-01 17:37:48,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:48,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:48,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:48,801 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:48,801 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:48,803 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:48,804 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:37:48,807 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:48,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:37:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:48,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:48,954 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:48,954 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:48,956 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:48,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:48,974 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790196518] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:48,974 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:48,974 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 22 [2022-03-01 17:37:48,975 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993029581] [2022-03-01 17:37:48,975 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:48,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-03-01 17:37:48,975 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:48,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-03-01 17:37:48,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:37:48,975 INFO L87 Difference]: Start difference. First operand 1263 states and 3589 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:50,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:50,247 INFO L93 Difference]: Finished difference Result 1457 states and 3928 transitions. [2022-03-01 17:37:50,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-03-01 17:37:50,248 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:50,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:50,249 INFO L225 Difference]: With dead ends: 1457 [2022-03-01 17:37:50,249 INFO L226 Difference]: Without dead ends: 1457 [2022-03-01 17:37:50,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2022-03-01 17:37:50,250 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 97 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 935 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:50,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 62 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 935 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:37:50,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1457 states. [2022-03-01 17:37:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1457 to 1238. [2022-03-01 17:37:50,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1238 states, 1237 states have (on average 2.8294260307194827) internal successors, (3500), 1237 states have internal predecessors, (3500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:50,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1238 states to 1238 states and 3500 transitions. [2022-03-01 17:37:50,263 INFO L78 Accepts]: Start accepts. Automaton has 1238 states and 3500 transitions. Word has length 17 [2022-03-01 17:37:50,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:50,263 INFO L470 AbstractCegarLoop]: Abstraction has 1238 states and 3500 transitions. [2022-03-01 17:37:50,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:50,263 INFO L276 IsEmpty]: Start isEmpty. Operand 1238 states and 3500 transitions. [2022-03-01 17:37:50,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:50,264 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:50,264 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:50,280 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (425)] Ended with exit code 0 [2022-03-01 17:37:50,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2022-03-01 17:37:50,464 INFO L402 AbstractCegarLoop]: === Iteration 435 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:50,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:50,465 INFO L85 PathProgramCache]: Analyzing trace with hash 161991349, now seen corresponding path program 421 times [2022-03-01 17:37:50,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:50,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363821895] [2022-03-01 17:37:50,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:50,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:50,562 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:50,562 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:50,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363821895] [2022-03-01 17:37:50,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363821895] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:50,562 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507044346] [2022-03-01 17:37:50,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:37:50,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:50,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:50,563 INFO L229 MonitoredProcess]: Starting monitored process 426 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:50,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Waiting until timeout for monitored process [2022-03-01 17:37:50,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:50,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:50,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:50,762 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:50,763 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:50,765 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:50,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:37:50,769 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:50,769 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:37:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:50,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:50,906 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:50,906 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:50,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:50,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507044346] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:50,926 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:50,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-03-01 17:37:50,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674481785] [2022-03-01 17:37:50,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:50,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-01 17:37:50,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:50,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-01 17:37:50,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-03-01 17:37:50,927 INFO L87 Difference]: Start difference. First operand 1238 states and 3500 transitions. Second operand has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:52,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:52,297 INFO L93 Difference]: Finished difference Result 1410 states and 3831 transitions. [2022-03-01 17:37:52,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-03-01 17:37:52,297 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:52,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:52,299 INFO L225 Difference]: With dead ends: 1410 [2022-03-01 17:37:52,299 INFO L226 Difference]: Without dead ends: 1410 [2022-03-01 17:37:52,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=436, Invalid=2644, Unknown=0, NotChecked=0, Total=3080 [2022-03-01 17:37:52,299 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 67 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 960 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:52,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 54 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 960 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-01 17:37:52,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1410 states. [2022-03-01 17:37:52,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1410 to 1228. [2022-03-01 17:37:52,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8280358598207007) internal successors, (3470), 1227 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3470 transitions. [2022-03-01 17:37:52,318 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3470 transitions. Word has length 17 [2022-03-01 17:37:52,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:52,318 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 3470 transitions. [2022-03-01 17:37:52,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:52,318 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3470 transitions. [2022-03-01 17:37:52,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-03-01 17:37:52,319 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:52,319 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:52,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (426)] Forceful destruction successful, exit code 0 [2022-03-01 17:37:52,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 426 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2022-03-01 17:37:52,520 INFO L402 AbstractCegarLoop]: === Iteration 436 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1235076729, now seen corresponding path program 422 times [2022-03-01 17:37:52,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:52,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712677308] [2022-03-01 17:37:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:52,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:52,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:52,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:52,617 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:52,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712677308] [2022-03-01 17:37:52,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712677308] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:52,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468302194] [2022-03-01 17:37:52,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:37:52,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:52,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:52,618 INFO L229 MonitoredProcess]: Starting monitored process 427 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:52,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Waiting until timeout for monitored process [2022-03-01 17:37:52,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:37:52,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:52,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2022-03-01 17:37:52,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:52,808 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:52,808 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2022-03-01 17:37:52,810 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:52,810 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2022-03-01 17:37:52,814 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:52,814 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2022-03-01 17:37:52,842 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:52,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:52,928 INFO L353 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2022-03-01 17:37:52,928 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 27 [2022-03-01 17:37:52,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-03-01 17:37:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:52,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468302194] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:52,948 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:52,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2022-03-01 17:37:52,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622031619] [2022-03-01 17:37:52,949 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:52,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-03-01 17:37:52,949 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:52,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-03-01 17:37:52,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-03-01 17:37:52,949 INFO L87 Difference]: Start difference. First operand 1228 states and 3470 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:53,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:53,229 INFO L93 Difference]: Finished difference Result 1303 states and 3606 transitions. [2022-03-01 17:37:53,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-01 17:37:53,229 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2022-03-01 17:37:53,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:53,231 INFO L225 Difference]: With dead ends: 1303 [2022-03-01 17:37:53,231 INFO L226 Difference]: Without dead ends: 1303 [2022-03-01 17:37:53,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2022-03-01 17:37:53,231 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 45 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:53,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 50 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-01 17:37:53,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2022-03-01 17:37:53,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1228. [2022-03-01 17:37:53,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8280358598207007) internal successors, (3470), 1227 states have internal predecessors, (3470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:53,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3470 transitions. [2022-03-01 17:37:53,243 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3470 transitions. Word has length 17 [2022-03-01 17:37:53,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:53,243 INFO L470 AbstractCegarLoop]: Abstraction has 1228 states and 3470 transitions. [2022-03-01 17:37:53,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:53,243 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3470 transitions. [2022-03-01 17:37:53,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:37:53,245 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:53,245 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:53,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (427)] Ended with exit code 0 [2022-03-01 17:37:53,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable435 [2022-03-01 17:37:53,445 INFO L402 AbstractCegarLoop]: === Iteration 437 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:53,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:53,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1502419871, now seen corresponding path program 423 times [2022-03-01 17:37:53,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:53,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40910589] [2022-03-01 17:37:53,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:53,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:53,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:53,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:53,913 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:53,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40910589] [2022-03-01 17:37:53,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40910589] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:53,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91706983] [2022-03-01 17:37:53,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:37:53,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:53,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:53,915 INFO L229 MonitoredProcess]: Starting monitored process 428 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:53,915 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Waiting until timeout for monitored process [2022-03-01 17:37:53,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-03-01 17:37:53,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:53,942 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-01 17:37:53,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:37:54,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:37:54,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:37:54,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:37:54,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:37:54,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:37:54,851 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:37:54,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:37:54,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:37:54,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:37:54,854 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:54,854 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-03-01 17:37:54,857 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:54,857 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:37:54,907 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:54,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:37:56,215 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-03-01 17:37:56,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-03-01 17:37:56,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:56,220 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:56,221 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:56,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:56,223 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:56,226 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:37:56,281 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:37:56,281 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-03-01 17:37:57,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:57,099 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91706983] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:37:57,099 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:37:57,100 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-03-01 17:37:57,100 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319843814] [2022-03-01 17:37:57,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:37:57,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:37:57,100 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:37:57,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:37:57,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:37:57,100 INFO L87 Difference]: Start difference. First operand 1228 states and 3470 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:58,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:37:58,731 INFO L93 Difference]: Finished difference Result 1690 states and 4639 transitions. [2022-03-01 17:37:58,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-03-01 17:37:58,732 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:37:58,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:37:58,734 INFO L225 Difference]: With dead ends: 1690 [2022-03-01 17:37:58,734 INFO L226 Difference]: Without dead ends: 1688 [2022-03-01 17:37:58,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=181, Invalid=2075, Unknown=0, NotChecked=0, Total=2256 [2022-03-01 17:37:58,734 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 52 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 876 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 876 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 400 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:37:58,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 43 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 876 Invalid, 0 Unknown, 400 Unchecked, 0.5s Time] [2022-03-01 17:37:58,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1688 states. [2022-03-01 17:37:58,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1688 to 1234. [2022-03-01 17:37:58,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1234 states, 1233 states have (on average 2.8231954582319547) internal successors, (3481), 1233 states have internal predecessors, (3481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1234 states to 1234 states and 3481 transitions. [2022-03-01 17:37:58,747 INFO L78 Accepts]: Start accepts. Automaton has 1234 states and 3481 transitions. Word has length 18 [2022-03-01 17:37:58,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:37:58,747 INFO L470 AbstractCegarLoop]: Abstraction has 1234 states and 3481 transitions. [2022-03-01 17:37:58,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:37:58,747 INFO L276 IsEmpty]: Start isEmpty. Operand 1234 states and 3481 transitions. [2022-03-01 17:37:58,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:37:58,749 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:37:58,749 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:37:58,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (428)] Ended with exit code 0 [2022-03-01 17:37:58,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 428 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2022-03-01 17:37:58,949 INFO L402 AbstractCegarLoop]: === Iteration 438 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:37:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:37:58,949 INFO L85 PathProgramCache]: Analyzing trace with hash 1071632419, now seen corresponding path program 424 times [2022-03-01 17:37:58,949 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:37:58,949 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553382032] [2022-03-01 17:37:58,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:37:58,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:37:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:37:59,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:37:59,374 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:37:59,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553382032] [2022-03-01 17:37:59,374 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553382032] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:37:59,374 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614093322] [2022-03-01 17:37:59,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:37:59,374 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:37:59,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:37:59,375 INFO L229 MonitoredProcess]: Starting monitored process 429 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:37:59,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Waiting until timeout for monitored process [2022-03-01 17:37:59,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:37:59,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:37:59,401 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-01 17:37:59,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:00,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:00,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:00,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:00,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:00,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:00,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:00,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:00,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:00,260 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:00,260 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:00,260 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-03-01 17:38:00,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:00,262 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:38:00,318 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:00,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:01,597 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-03-01 17:38:01,597 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-03-01 17:38:01,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:01,602 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:01,603 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:01,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:01,605 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:01,607 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:01,662 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:01,663 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-03-01 17:38:02,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:02,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614093322] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:02,375 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:02,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-03-01 17:38:02,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428224752] [2022-03-01 17:38:02,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:02,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:38:02,375 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:02,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:38:02,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:38:02,375 INFO L87 Difference]: Start difference. First operand 1234 states and 3481 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:03,485 INFO L93 Difference]: Finished difference Result 1676 states and 4626 transitions. [2022-03-01 17:38:03,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-03-01 17:38:03,486 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:38:03,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:03,488 INFO L225 Difference]: With dead ends: 1676 [2022-03-01 17:38:03,488 INFO L226 Difference]: Without dead ends: 1673 [2022-03-01 17:38:03,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=149, Invalid=1657, Unknown=0, NotChecked=0, Total=1806 [2022-03-01 17:38:03,488 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 36 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 632 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 348 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:03,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 24 Invalid, 989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 632 Invalid, 0 Unknown, 348 Unchecked, 0.4s Time] [2022-03-01 17:38:03,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1673 states. [2022-03-01 17:38:03,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1673 to 1239. [2022-03-01 17:38:03,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 1238 states have (on average 2.8206785137318255) internal successors, (3492), 1238 states have internal predecessors, (3492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 3492 transitions. [2022-03-01 17:38:03,501 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 3492 transitions. Word has length 18 [2022-03-01 17:38:03,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:03,501 INFO L470 AbstractCegarLoop]: Abstraction has 1239 states and 3492 transitions. [2022-03-01 17:38:03,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:03,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 3492 transitions. [2022-03-01 17:38:03,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:38:03,503 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:03,503 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:03,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (429)] Ended with exit code 0 [2022-03-01 17:38:03,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable437,429 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:03,703 INFO L402 AbstractCegarLoop]: === Iteration 439 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:38:03,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:03,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1242334849, now seen corresponding path program 425 times [2022-03-01 17:38:03,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:03,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230826868] [2022-03-01 17:38:03,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:03,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:03,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:04,124 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:04,125 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:04,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230826868] [2022-03-01 17:38:04,125 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230826868] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:04,125 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112612468] [2022-03-01 17:38:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-03-01 17:38:04,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:04,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:04,126 INFO L229 MonitoredProcess]: Starting monitored process 430 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:04,126 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Waiting until timeout for monitored process [2022-03-01 17:38:04,153 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-03-01 17:38:04,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:04,154 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-01 17:38:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:05,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:05,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:05,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:05,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:05,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:05,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:05,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:05,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:05,204 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:05,204 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-03-01 17:38:05,206 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:05,206 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:38:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:05,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:06,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,701 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,702 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,704 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,705 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,767 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-03-01 17:38:06,768 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 270 treesize of output 270 [2022-03-01 17:38:06,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,776 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,779 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:06,839 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:06,839 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 336 [2022-03-01 17:38:08,866 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:08,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112612468] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:08,866 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:08,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-01 17:38:08,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661771144] [2022-03-01 17:38:08,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:08,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:38:08,867 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:08,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:38:08,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:38:08,867 INFO L87 Difference]: Start difference. First operand 1239 states and 3492 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:12,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:12,819 INFO L93 Difference]: Finished difference Result 1956 states and 5378 transitions. [2022-03-01 17:38:12,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-01 17:38:12,820 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:38:12,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:12,822 INFO L225 Difference]: With dead ends: 1956 [2022-03-01 17:38:12,822 INFO L226 Difference]: Without dead ends: 1952 [2022-03-01 17:38:12,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=343, Invalid=3439, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:38:12,823 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 51 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 1191 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 345 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:12,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 23 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1191 Invalid, 0 Unknown, 345 Unchecked, 0.8s Time] [2022-03-01 17:38:12,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1952 states. [2022-03-01 17:38:12,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1952 to 1246. [2022-03-01 17:38:12,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 2.819277108433735) internal successors, (3510), 1245 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:12,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3510 transitions. [2022-03-01 17:38:12,837 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3510 transitions. Word has length 18 [2022-03-01 17:38:12,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:12,837 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 3510 transitions. [2022-03-01 17:38:12,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3510 transitions. [2022-03-01 17:38:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:38:12,838 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:12,839 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:12,854 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (430)] Ended with exit code 0 [2022-03-01 17:38:13,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable438 [2022-03-01 17:38:13,039 INFO L402 AbstractCegarLoop]: === Iteration 440 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:38:13,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:13,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2100614733, now seen corresponding path program 426 times [2022-03-01 17:38:13,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:13,039 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114110134] [2022-03-01 17:38:13,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:13,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:13,467 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:13,467 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:13,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114110134] [2022-03-01 17:38:13,468 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114110134] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:13,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741625092] [2022-03-01 17:38:13,468 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-03-01 17:38:13,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:13,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:13,469 INFO L229 MonitoredProcess]: Starting monitored process 431 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:13,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Waiting until timeout for monitored process [2022-03-01 17:38:13,494 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-03-01 17:38:13,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:13,495 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-01 17:38:13,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:14,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:14,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:14,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:14,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:14,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:14,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:14,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:14,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:14,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:14,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:14,409 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-03-01 17:38:14,411 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:14,411 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:38:14,464 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:14,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:15,765 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-03-01 17:38:15,765 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 248 treesize of output 252 [2022-03-01 17:38:15,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:15,770 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:15,771 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:15,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:15,773 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:15,775 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:15,837 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:15,837 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 220 treesize of output 322 [2022-03-01 17:38:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:16,580 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [741625092] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:16,580 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:16,580 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 32 [2022-03-01 17:38:16,580 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973493689] [2022-03-01 17:38:16,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:16,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-01 17:38:16,580 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-01 17:38:16,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=911, Unknown=0, NotChecked=0, Total=992 [2022-03-01 17:38:16,580 INFO L87 Difference]: Start difference. First operand 1246 states and 3510 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:18,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:18,604 INFO L93 Difference]: Finished difference Result 1703 states and 4677 transitions. [2022-03-01 17:38:18,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-01 17:38:18,604 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:38:18,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:18,607 INFO L225 Difference]: With dead ends: 1703 [2022-03-01 17:38:18,607 INFO L226 Difference]: Without dead ends: 1699 [2022-03-01 17:38:18,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=192, Invalid=2460, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:38:18,607 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 23 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 1046 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1046 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 394 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:18,607 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 26 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1046 Invalid, 0 Unknown, 394 Unchecked, 0.6s Time] [2022-03-01 17:38:18,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1699 states. [2022-03-01 17:38:18,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1699 to 1246. [2022-03-01 17:38:18,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 2.819277108433735) internal successors, (3510), 1245 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:18,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3510 transitions. [2022-03-01 17:38:18,623 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3510 transitions. Word has length 18 [2022-03-01 17:38:18,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:18,623 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 3510 transitions. [2022-03-01 17:38:18,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:18,623 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3510 transitions. [2022-03-01 17:38:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:38:18,624 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:18,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:18,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (431)] Forceful destruction successful, exit code 0 [2022-03-01 17:38:18,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable439,431 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:18,825 INFO L402 AbstractCegarLoop]: === Iteration 441 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:38:18,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:18,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1357479935, now seen corresponding path program 427 times [2022-03-01 17:38:18,825 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:18,825 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977296698] [2022-03-01 17:38:18,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:18,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:18,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:19,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:19,248 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:19,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977296698] [2022-03-01 17:38:19,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977296698] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:19,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608771232] [2022-03-01 17:38:19,248 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-03-01 17:38:19,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:19,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:19,249 INFO L229 MonitoredProcess]: Starting monitored process 432 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:19,250 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Waiting until timeout for monitored process [2022-03-01 17:38:19,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:19,275 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-01 17:38:19,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:20,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:20,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:20,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:20,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:20,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:20,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:20,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:20,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:20,335 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:20,335 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-03-01 17:38:20,337 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:20,337 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:38:20,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:20,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:21,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,832 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,835 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,837 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,899 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-03-01 17:38:21,899 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 270 treesize of output 270 [2022-03-01 17:38:21,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,905 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,908 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,910 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:21,969 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:21,969 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 336 [2022-03-01 17:38:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:23,500 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608771232] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:23,500 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:23,500 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-01 17:38:23,501 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744561283] [2022-03-01 17:38:23,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:23,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:38:23,501 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:23,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:38:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:38:23,501 INFO L87 Difference]: Start difference. First operand 1246 states and 3510 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:29,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:29,802 INFO L93 Difference]: Finished difference Result 1967 states and 5382 transitions. [2022-03-01 17:38:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-01 17:38:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:38:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:29,805 INFO L225 Difference]: With dead ends: 1967 [2022-03-01 17:38:29,805 INFO L226 Difference]: Without dead ends: 1957 [2022-03-01 17:38:29,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=445, Invalid=4385, Unknown=0, NotChecked=0, Total=4830 [2022-03-01 17:38:29,805 INFO L933 BasicCegarLoop]: 3 mSDtfsCounter, 98 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 1520 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 2030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 486 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:29,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 50 Invalid, 2030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1520 Invalid, 0 Unknown, 486 Unchecked, 1.0s Time] [2022-03-01 17:38:29,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1957 states. [2022-03-01 17:38:29,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1957 to 1246. [2022-03-01 17:38:29,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 2.819277108433735) internal successors, (3510), 1245 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3510 transitions. [2022-03-01 17:38:29,819 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3510 transitions. Word has length 18 [2022-03-01 17:38:29,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:29,819 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 3510 transitions. [2022-03-01 17:38:29,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:29,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3510 transitions. [2022-03-01 17:38:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:38:29,821 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:29,821 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:29,836 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (432)] Ended with exit code 0 [2022-03-01 17:38:30,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,432 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:30,021 INFO L402 AbstractCegarLoop]: === Iteration 442 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:38:30,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:30,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1184232243, now seen corresponding path program 428 times [2022-03-01 17:38:30,022 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:30,022 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296353502] [2022-03-01 17:38:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:30,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:30,447 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:30,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296353502] [2022-03-01 17:38:30,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296353502] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:30,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109440582] [2022-03-01 17:38:30,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-03-01 17:38:30,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:30,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:30,448 INFO L229 MonitoredProcess]: Starting monitored process 433 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:30,448 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Waiting until timeout for monitored process [2022-03-01 17:38:30,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-03-01 17:38:30,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:30,477 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-01 17:38:30,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:31,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:31,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:31,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:31,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:31,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:31,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:31,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:31,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:31,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:31,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:31,547 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-03-01 17:38:31,549 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:31,549 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:38:31,603 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:31,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:33,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,056 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,058 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,059 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,061 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,123 INFO L353 Elim1Store]: treesize reduction 98, result has 39.1 percent of original size [2022-03-01 17:38:33,123 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 270 treesize of output 270 [2022-03-01 17:38:33,128 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,129 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,132 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,134 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:33,192 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:33,193 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 238 treesize of output 336 [2022-03-01 17:38:34,751 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:34,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109440582] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:34,751 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:34,751 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 34 [2022-03-01 17:38:34,751 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312898390] [2022-03-01 17:38:34,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:34,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-03-01 17:38:34,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:34,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-03-01 17:38:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-03-01 17:38:34,752 INFO L87 Difference]: Start difference. First operand 1246 states and 3510 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:38,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:38,825 INFO L93 Difference]: Finished difference Result 1948 states and 5356 transitions. [2022-03-01 17:38:38,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-03-01 17:38:38,826 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:38:38,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:38,828 INFO L225 Difference]: With dead ends: 1948 [2022-03-01 17:38:38,828 INFO L226 Difference]: Without dead ends: 1944 [2022-03-01 17:38:38,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=350, Invalid=3432, Unknown=0, NotChecked=0, Total=3782 [2022-03-01 17:38:38,828 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 85 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 1614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 418 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:38,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 25 Invalid, 1614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1174 Invalid, 0 Unknown, 418 Unchecked, 0.8s Time] [2022-03-01 17:38:38,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1944 states. [2022-03-01 17:38:38,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1944 to 1246. [2022-03-01 17:38:38,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1246 states, 1245 states have (on average 2.819277108433735) internal successors, (3510), 1245 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1246 states to 1246 states and 3510 transitions. [2022-03-01 17:38:38,842 INFO L78 Accepts]: Start accepts. Automaton has 1246 states and 3510 transitions. Word has length 18 [2022-03-01 17:38:38,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:38,842 INFO L470 AbstractCegarLoop]: Abstraction has 1246 states and 3510 transitions. [2022-03-01 17:38:38,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:38,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1246 states and 3510 transitions. [2022-03-01 17:38:38,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:38:38,844 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:38,844 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:38,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (433)] Forceful destruction successful, exit code 0 [2022-03-01 17:38:39,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2022-03-01 17:38:39,044 INFO L402 AbstractCegarLoop]: === Iteration 443 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:38:39,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:39,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1601118559, now seen corresponding path program 429 times [2022-03-01 17:38:39,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:39,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992102272] [2022-03-01 17:38:39,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:39,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:39,578 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:39,578 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:39,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992102272] [2022-03-01 17:38:39,578 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992102272] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:39,578 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779945918] [2022-03-01 17:38:39,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-03-01 17:38:39,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:39,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:39,579 INFO L229 MonitoredProcess]: Starting monitored process 434 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:39,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Waiting until timeout for monitored process [2022-03-01 17:38:39,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-03-01 17:38:39,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:39,607 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2022-03-01 17:38:39,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:40,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:40,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:40,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:40,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:40,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:40,527 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:38:40,527 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 1 case distinctions, treesize of input 134 treesize of output 109 [2022-03-01 17:38:40,534 INFO L353 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-03-01 17:38:40,534 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 72 [2022-03-01 17:38:40,716 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:40,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:42,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:42,155 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:42,156 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:42,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:42,158 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:42,161 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:42,215 INFO L353 Elim1Store]: treesize reduction 113, result has 29.8 percent of original size [2022-03-01 17:38:42,216 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 262 treesize of output 249 [2022-03-01 17:38:42,240 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:42,241 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 196 treesize of output 188 [2022-03-01 17:38:42,809 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:42,810 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779945918] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:42,810 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:42,810 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 35 [2022-03-01 17:38:42,810 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639052890] [2022-03-01 17:38:42,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:42,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-01 17:38:42,810 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:42,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-01 17:38:42,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=1063, Unknown=0, NotChecked=0, Total=1190 [2022-03-01 17:38:42,810 INFO L87 Difference]: Start difference. First operand 1246 states and 3510 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:44,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-01 17:38:44,866 INFO L93 Difference]: Finished difference Result 1865 states and 5218 transitions. [2022-03-01 17:38:44,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-01 17:38:44,866 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-03-01 17:38:44,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-01 17:38:44,869 INFO L225 Difference]: With dead ends: 1865 [2022-03-01 17:38:44,869 INFO L226 Difference]: Without dead ends: 1859 [2022-03-01 17:38:44,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=274, Invalid=2378, Unknown=0, NotChecked=0, Total=2652 [2022-03-01 17:38:44,869 INFO L933 BasicCegarLoop]: 2 mSDtfsCounter, 45 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 94 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:44,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 20 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 715 Invalid, 0 Unknown, 94 Unchecked, 0.5s Time] [2022-03-01 17:38:44,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1859 states. [2022-03-01 17:38:44,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1859 to 1258. [2022-03-01 17:38:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1257 states have (on average 2.8217979315831343) internal successors, (3547), 1257 states have internal predecessors, (3547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 3547 transitions. [2022-03-01 17:38:44,883 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 3547 transitions. Word has length 18 [2022-03-01 17:38:44,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-01 17:38:44,884 INFO L470 AbstractCegarLoop]: Abstraction has 1258 states and 3547 transitions. [2022-03-01 17:38:44,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-03-01 17:38:44,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 3547 transitions. [2022-03-01 17:38:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-01 17:38:44,885 INFO L506 BasicCegarLoop]: Found error trace [2022-03-01 17:38:44,885 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-01 17:38:44,900 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (434)] Ended with exit code 0 [2022-03-01 17:38:45,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable442,434 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:45,085 INFO L402 AbstractCegarLoop]: === Iteration 444 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2022-03-01 17:38:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-01 17:38:45,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1086327551, now seen corresponding path program 430 times [2022-03-01 17:38:45,086 INFO L126 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-01 17:38:45,086 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884350994] [2022-03-01 17:38:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-01 17:38:45,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-01 17:38:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-01 17:38:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:45,546 INFO L144 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-01 17:38:45,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884350994] [2022-03-01 17:38:45,546 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884350994] provided 0 perfect and 1 imperfect interpolant sequences [2022-03-01 17:38:45,546 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112273639] [2022-03-01 17:38:45,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-03-01 17:38:45,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-03-01 17:38:45,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-01 17:38:45,547 INFO L229 MonitoredProcess]: Starting monitored process 435 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-03-01 17:38:45,548 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Waiting until timeout for monitored process [2022-03-01 17:38:45,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-03-01 17:38:45,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-03-01 17:38:45,574 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2022-03-01 17:38:45,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-03-01 17:38:46,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:46,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:46,475 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:46,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:46,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:46,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:46,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:46,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:46,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-03-01 17:38:46,479 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:46,479 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 103 treesize of output 79 [2022-03-01 17:38:46,481 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:46,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 46 [2022-03-01 17:38:46,532 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:46,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-03-01 17:38:47,821 INFO L353 Elim1Store]: treesize reduction 170, result has 27.0 percent of original size [2022-03-01 17:38:47,821 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 22 case distinctions, treesize of input 264 treesize of output 268 [2022-03-01 17:38:47,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:47,826 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:47,827 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:47,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:47,829 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:47,831 INFO L173 IndexEqualityManager]: detected equality via solver [2022-03-01 17:38:47,887 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-03-01 17:38:47,887 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 12 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 16 case distinctions, treesize of input 236 treesize of output 338 [2022-03-01 17:38:48,814 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-01 17:38:48,814 INFO L165 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112273639] provided 0 perfect and 2 imperfect interpolant sequences [2022-03-01 17:38:48,814 INFO L191 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-03-01 17:38:48,814 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 31 [2022-03-01 17:38:48,814 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663332370] [2022-03-01 17:38:48,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-03-01 17:38:48,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-03-01 17:38:48,814 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-03-01 17:38:48,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-03-01 17:38:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=854, Unknown=0, NotChecked=0, Total=930 [2022-03-01 17:38:48,815 INFO L87 Difference]: Start difference. First operand 1258 states and 3547 transitions. Second operand has 31 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2022-03-01 17:38:50,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-03-01 17:38:50,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=146, Invalid=1494, Unknown=0, NotChecked=0, Total=1640 [2022-03-01 17:38:50,008 INFO L933 BasicCegarLoop]: 0 mSDtfsCounter, 18 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 591 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 591 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 59 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-01 17:38:50,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 0 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 591 Invalid, 0 Unknown, 59 Unchecked, 0.4s Time] [2022-03-01 17:38:50,009 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (2 of 3 remaining) [2022-03-01 17:38:50,025 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Ended with exit code 0 [2022-03-01 17:38:50,056 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (435)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 17:38:50,056 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-03-01 17:38:50,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 435 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2022-03-01 17:38:50,210 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (1258states) and FLOYD_HOARE automaton (currently 16 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 41 known predicates. [2022-03-01 17:38:50,211 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (1 of 3 remaining) [2022-03-01 17:38:50,211 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (0 of 3 remaining) [2022-03-01 17:38:50,213 INFO L732 BasicCegarLoop]: Path program histogram: [430, 6, 6, 2] [2022-03-01 17:38:50,215 INFO L230 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-03-01 17:38:50,215 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-03-01 17:38:50,217 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 01.03 05:38:50 BasicIcfg [2022-03-01 17:38:50,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-03-01 17:38:50,217 INFO L158 Benchmark]: Toolchain (without parser) took 756502.09ms. Allocated memory was 175.1MB in the beginning and 254.8MB in the end (delta: 79.7MB). Free memory was 138.8MB in the beginning and 112.6MB in the end (delta: 26.1MB). Peak memory consumption was 106.7MB. Max. memory is 8.0GB. [2022-03-01 17:38:50,217 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.14ms. Allocated memory is still 175.1MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 17:38:50,217 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.74ms. Allocated memory is still 175.1MB. Free memory was 138.8MB in the beginning and 137.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-03-01 17:38:50,217 INFO L158 Benchmark]: Boogie Preprocessor took 24.03ms. Allocated memory is still 175.1MB. Free memory was 137.2MB in the beginning and 136.3MB in the end (delta: 898.4kB). There was no memory consumed. Max. memory is 8.0GB. [2022-03-01 17:38:50,217 INFO L158 Benchmark]: RCFGBuilder took 225.71ms. Allocated memory is still 175.1MB. Free memory was 136.1MB in the beginning and 125.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. [2022-03-01 17:38:50,217 INFO L158 Benchmark]: TraceAbstraction took 756224.70ms. Allocated memory was 175.1MB in the beginning and 254.8MB in the end (delta: 79.7MB). Free memory was 125.0MB in the beginning and 112.6MB in the end (delta: 12.4MB). Peak memory consumption was 93.1MB. Max. memory is 8.0GB. [2022-03-01 17:38:50,217 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.14ms. Allocated memory is still 175.1MB. Free memory is still 139.9MB. There was no memory consumed. Max. memory is 8.0GB. * Boogie Procedure Inliner took 22.74ms. Allocated memory is still 175.1MB. Free memory was 138.8MB in the beginning and 137.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * Boogie Preprocessor took 24.03ms. Allocated memory is still 175.1MB. Free memory was 137.2MB in the beginning and 136.3MB in the end (delta: 898.4kB). There was no memory consumed. Max. memory is 8.0GB. * RCFGBuilder took 225.71ms. Allocated memory is still 175.1MB. Free memory was 136.1MB in the beginning and 125.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 8.0GB. * TraceAbstraction took 756224.70ms. Allocated memory was 175.1MB in the beginning and 254.8MB in the end (delta: 79.7MB). Free memory was 125.0MB in the beginning and 112.6MB in the end (delta: 12.4MB). Peak memory consumption was 93.1MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (1258states) and FLOYD_HOARE automaton (currently 16 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 41 known predicates. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1258states) and FLOYD_HOARE automaton (currently 16 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 41 known predicates. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (1258states) and FLOYD_HOARE automaton (currently 16 states, 31 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 41 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 756.1s, OverallIterations: 444, TraceHistogramMax: 4, PathProgramHistogramMax: 430, EmptinessCheckTime: 0.3s, AutomataDifference: 285.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 27206 SdHoareTripleChecker+Valid, 103.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 27206 mSDsluCounter, 26169 SdHoareTripleChecker+Invalid, 87.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 19893 IncrementalHoareTripleChecker+Unchecked, 86080 mSDsCounter, 7835 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 233998 IncrementalHoareTripleChecker+Invalid, 261726 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7835 mSolverCounterUnsat, 2304 mSDtfsCounter, 233998 mSolverCounterSat, 0.5s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 22403 GetRequests, 8653 SyntacticMatches, 1179 SemanticMatches, 12570 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87311 ImplicationChecksByTransitivity, 306.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1292occurred in iteration=432, InterpolantAutomatonStates: 9676, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 3.3s AutomataMinimizationTime, 443 MinimizatonAttempts, 47500 StatesRemovedByMinimization, 443 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 5.3s SatisfiabilityAnalysisTime, 363.2s InterpolantComputationTime, 13796 NumberOfCodeBlocks, 13796 NumberOfCodeBlocksAsserted, 1450 NumberOfCheckSat, 19328 ConstructedInterpolants, 676 QuantifiedInterpolants, 355865 SizeOfPredicates, 4168 NumberOfNonLiveVariables, 32184 ConjunctsInSsa, 10494 ConjunctsInUnsatCore, 1312 InterpolantComputations, 10 PerfectInterpolantSequences, 2106/15554 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown