/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/popl20-more/buffer-mult.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-?-bc289cb [2022-01-28 15:40:15,916 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-28 15:40:15,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-28 15:40:15,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-28 15:40:16,002 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 [2022-01-28 15:40:16,033 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-28 15:40:16,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-28 15:40:16,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-28 15:40:16,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-28 15:40:16,034 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-28 15:40:16,034 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-28 15:40:16,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-28 15:40:16,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-28 15:40:16,035 INFO L138 SettingsManager]: * Use SBE=true [2022-01-28 15:40:16,035 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-28 15:40:16,035 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-28 15:40:16,035 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-28 15:40:16,035 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-28 15:40:16,035 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-28 15:40:16,035 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-28 15:40:16,035 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-28 15:40:16,036 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-28 15:40:16,036 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-28 15:40:16,036 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-28 15:40:16,036 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-28 15:40:16,036 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-28 15:40:16,036 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-28 15:40:16,036 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-28 15:40:16,036 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-28 15:40:16,036 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-28 15:40:16,036 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:40:16,036 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-28 15:40:16,036 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-28 15:40:16,037 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-28 15:40:16,037 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-28 15:40:16,037 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-28 15:40:16,037 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-28 15:40:16,037 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-28 15:40:16,037 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-28 15:40:16,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-28 15:40:16,233 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-28 15:40:16,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-28 15:40:16,235 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-28 15:40:16,236 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-28 15:40:16,237 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl [2022-01-28 15:40:16,237 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/buffer-mult.wvr.bpl' [2022-01-28 15:40:16,257 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-28 15:40:16,258 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-28 15:40:16,260 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-28 15:40:16,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-28 15:40:16,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-28 15:40:16,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/1) ... [2022-01-28 15:40:16,277 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/1) ... [2022-01-28 15:40:16,282 INFO L137 Inliner]: procedures = 5, calls = 4, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-28 15:40:16,282 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-28 15:40:16,286 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-28 15:40:16,286 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-28 15:40:16,286 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-28 15:40:16,291 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/1) ... [2022-01-28 15:40:16,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/1) ... [2022-01-28 15:40:16,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/1) ... [2022-01-28 15:40:16,291 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/1) ... [2022-01-28 15:40:16,294 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/1) ... [2022-01-28 15:40:16,295 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/1) ... [2022-01-28 15:40:16,296 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/1) ... [2022-01-28 15:40:16,296 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-28 15:40:16,297 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-28 15:40:16,297 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-28 15:40:16,297 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-28 15:40:16,300 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/1) ... [2022-01-28 15:40:16,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-28 15:40:16,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:16,326 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) [2022-01-28 15:40:16,336 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 [2022-01-28 15:40:16,372 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-28 15:40:16,372 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-28 15:40:16,372 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-28 15:40:16,372 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-28 15:40:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-28 15:40:16,373 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-28 15:40:16,373 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-28 15:40:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-28 15:40:16,373 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-28 15:40:16,373 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-28 15:40:16,373 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-28 15:40:16,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-28 15:40:16,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2022-01-28 15:40:16,374 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-01-28 15:40:16,374 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-01-28 15:40:16,375 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-28 15:40:16,414 INFO L234 CfgBuilder]: Building ICFG [2022-01-28 15:40:16,416 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-28 15:40:16,524 INFO L275 CfgBuilder]: Performing block encoding [2022-01-28 15:40:16,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-28 15:40:16,540 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-28 15:40:16,542 INFO L202 PluginConnector]: Adding new model buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:40:16 BoogieIcfgContainer [2022-01-28 15:40:16,558 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-28 15:40:16,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-28 15:40:16,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-28 15:40:16,562 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-28 15:40:16,562 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 28.01 03:40:16" (1/2) ... [2022-01-28 15:40:16,563 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71508024 and model type buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 03:40:16, skipping insertion in model container [2022-01-28 15:40:16,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "buffer-mult.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 03:40:16" (2/2) ... [2022-01-28 15:40:16,564 INFO L111 eAbstractionObserver]: Analyzing ICFG buffer-mult.wvr.bpl [2022-01-28 15:40:16,567 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-28 15:40:16,567 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-28 15:40:16,567 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-28 15:40:16,567 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-28 15:40:16,608 INFO L148 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-01-28 15:40:16,634 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-28 15:40:16,639 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, 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 [2022-01-28 15:40:16,639 INFO L340 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-01-28 15:40:16,645 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 44 places, 35 transitions, 102 flow [2022-01-28 15:40:16,739 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:16,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:16,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-28 15:40:16,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:16,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:16,758 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:16,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1445873811, now seen corresponding path program 1 times [2022-01-28 15:40:16,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:16,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157602377] [2022-01-28 15:40:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:16,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:16,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:16,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:16,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157602377] [2022-01-28 15:40:16,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157602377] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:16,867 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:40:16,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-01-28 15:40:16,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552253498] [2022-01-28 15:40:16,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:16,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-28 15:40:16,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:16,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-28 15:40:16,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:40:16,901 INFO L87 Difference]: Start difference. First operand has 635 states, 634 states have (on average 3.889589905362776) internal successors, (2466), 634 states have internal predecessors, (2466), 0 states have call successors, (0), 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 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:16,967 INFO L93 Difference]: Finished difference Result 1236 states and 4843 transitions. [2022-01-28 15:40:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-28 15:40:16,972 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-01-28 15:40:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:16,991 INFO L225 Difference]: With dead ends: 1236 [2022-01-28 15:40:16,991 INFO L226 Difference]: Without dead ends: 1109 [2022-01-28 15:40:16,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-28 15:40:16,999 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:17,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:40:17,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1109 states. [2022-01-28 15:40:17,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1109 to 866. [2022-01-28 15:40:17,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 3.910982658959538) internal successors, (3383), 865 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) [2022-01-28 15:40:17,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 3383 transitions. [2022-01-28 15:40:17,108 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 3383 transitions. Word has length 19 [2022-01-28 15:40:17,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:17,108 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 3383 transitions. [2022-01-28 15:40:17,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 3383 transitions. [2022-01-28 15:40:17,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:40:17,113 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:17,113 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:17,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-28 15:40:17,114 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:17,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:17,117 INFO L85 PathProgramCache]: Analyzing trace with hash 925045909, now seen corresponding path program 1 times [2022-01-28 15:40:17,117 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:17,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891671668] [2022-01-28 15:40:17,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:17,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:17,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:17,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:17,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:17,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891671668] [2022-01-28 15:40:17,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891671668] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:17,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:40:17,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:40:17,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547518330] [2022-01-28 15:40:17,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:17,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:40:17,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:17,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:40:17,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:40:17,164 INFO L87 Difference]: Start difference. First operand 866 states and 3383 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-01-28 15:40:17,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:17,237 INFO L93 Difference]: Finished difference Result 1524 states and 5641 transitions. [2022-01-28 15:40:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:40:17,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 21 [2022-01-28 15:40:17,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:17,246 INFO L225 Difference]: With dead ends: 1524 [2022-01-28 15:40:17,246 INFO L226 Difference]: Without dead ends: 1418 [2022-01-28 15:40:17,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:40:17,253 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:17,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 35 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1418 states. [2022-01-28 15:40:17,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1418 to 1170. [2022-01-28 15:40:17,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1169 states have (on average 3.888793840889649) internal successors, (4546), 1169 states have internal predecessors, (4546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 4546 transitions. [2022-01-28 15:40:17,290 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 4546 transitions. Word has length 21 [2022-01-28 15:40:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:17,290 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 4546 transitions. [2022-01-28 15:40:17,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-01-28 15:40:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 4546 transitions. [2022-01-28 15:40:17,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-01-28 15:40:17,294 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:17,294 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:17,294 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-28 15:40:17,294 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:17,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:17,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1282496465, now seen corresponding path program 1 times [2022-01-28 15:40:17,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:17,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264755606] [2022-01-28 15:40:17,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:17,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:17,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:17,370 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:17,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264755606] [2022-01-28 15:40:17,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264755606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:17,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:40:17,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:40:17,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654959006] [2022-01-28 15:40:17,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:17,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:40:17,372 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:17,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:40:17,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:40:17,373 INFO L87 Difference]: Start difference. First operand 1170 states and 4546 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-01-28 15:40:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:17,456 INFO L93 Difference]: Finished difference Result 2017 states and 7510 transitions. [2022-01-28 15:40:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:40:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 21 [2022-01-28 15:40:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:17,467 INFO L225 Difference]: With dead ends: 2017 [2022-01-28 15:40:17,467 INFO L226 Difference]: Without dead ends: 1875 [2022-01-28 15:40:17,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:40:17,472 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 27 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:17,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 39 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:17,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1875 states. [2022-01-28 15:40:17,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1875 to 1656. [2022-01-28 15:40:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1656 states, 1655 states have (on average 3.8676737160120847) internal successors, (6401), 1655 states have internal predecessors, (6401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:17,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1656 states to 1656 states and 6401 transitions. [2022-01-28 15:40:17,525 INFO L78 Accepts]: Start accepts. Automaton has 1656 states and 6401 transitions. Word has length 21 [2022-01-28 15:40:17,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:17,525 INFO L470 AbstractCegarLoop]: Abstraction has 1656 states and 6401 transitions. [2022-01-28 15:40:17,526 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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) [2022-01-28 15:40:17,526 INFO L276 IsEmpty]: Start isEmpty. Operand 1656 states and 6401 transitions. [2022-01-28 15:40:17,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:40:17,530 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:17,530 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:17,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-28 15:40:17,531 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:17,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:17,532 INFO L85 PathProgramCache]: Analyzing trace with hash 770950601, now seen corresponding path program 1 times [2022-01-28 15:40:17,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:17,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402398633] [2022-01-28 15:40:17,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:17,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:17,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:17,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:17,579 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:17,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402398633] [2022-01-28 15:40:17,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402398633] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:17,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564472696] [2022-01-28 15:40:17,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:17,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:17,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:17,581 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) [2022-01-28 15:40:17,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-28 15:40:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:17,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:40:17,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:17,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:17,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:17,806 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:17,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564472696] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:17,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:17,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 5 [2022-01-28 15:40:17,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243543861] [2022-01-28 15:40:17,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:17,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:40:17,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:17,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:40:17,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:40:17,808 INFO L87 Difference]: Start difference. First operand 1656 states and 6401 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:17,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:17,956 INFO L93 Difference]: Finished difference Result 2308 states and 8261 transitions. [2022-01-28 15:40:17,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:40:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-28 15:40:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:17,966 INFO L225 Difference]: With dead ends: 2308 [2022-01-28 15:40:17,966 INFO L226 Difference]: Without dead ends: 2108 [2022-01-28 15:40:17,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:17,970 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 77 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:17,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 54 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:17,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2108 states. [2022-01-28 15:40:18,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2108 to 1456. [2022-01-28 15:40:18,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1456 states, 1455 states have (on average 3.777319587628866) internal successors, (5496), 1455 states have internal predecessors, (5496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:18,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1456 states to 1456 states and 5496 transitions. [2022-01-28 15:40:18,013 INFO L78 Accepts]: Start accepts. Automaton has 1456 states and 5496 transitions. Word has length 24 [2022-01-28 15:40:18,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:18,013 INFO L470 AbstractCegarLoop]: Abstraction has 1456 states and 5496 transitions. [2022-01-28 15:40:18,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:18,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1456 states and 5496 transitions. [2022-01-28 15:40:18,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:40:18,017 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:18,018 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:18,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:18,231 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 [2022-01-28 15:40:18,231 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:18,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:18,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1120776452, now seen corresponding path program 1 times [2022-01-28 15:40:18,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:18,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19902920] [2022-01-28 15:40:18,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:18,232 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:18,255 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:18,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:18,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19902920] [2022-01-28 15:40:18,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19902920] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:18,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:40:18,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:40:18,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476911847] [2022-01-28 15:40:18,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:18,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:40:18,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:18,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:40:18,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:40:18,257 INFO L87 Difference]: Start difference. First operand 1456 states and 5496 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-01-28 15:40:18,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:18,331 INFO L93 Difference]: Finished difference Result 1950 states and 6936 transitions. [2022-01-28 15:40:18,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:40:18,331 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2022-01-28 15:40:18,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:18,340 INFO L225 Difference]: With dead ends: 1950 [2022-01-28 15:40:18,340 INFO L226 Difference]: Without dead ends: 1860 [2022-01-28 15:40:18,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:40:18,341 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 64 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:18,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [64 Valid, 17 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:18,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1860 states. [2022-01-28 15:40:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1860 to 1544. [2022-01-28 15:40:18,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.725210628645496) internal successors, (5748), 1543 states have internal predecessors, (5748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:18,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5748 transitions. [2022-01-28 15:40:18,378 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5748 transitions. Word has length 24 [2022-01-28 15:40:18,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:18,379 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 5748 transitions. [2022-01-28 15:40:18,379 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-01-28 15:40:18,379 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5748 transitions. [2022-01-28 15:40:18,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:40:18,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:18,383 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:18,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-28 15:40:18,383 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:18,383 INFO L85 PathProgramCache]: Analyzing trace with hash 712551812, now seen corresponding path program 2 times [2022-01-28 15:40:18,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:18,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620348955] [2022-01-28 15:40:18,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:18,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:18,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:18,401 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:18,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620348955] [2022-01-28 15:40:18,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620348955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:18,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:40:18,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:40:18,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381147166] [2022-01-28 15:40:18,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:18,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:40:18,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:18,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:40:18,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:40:18,403 INFO L87 Difference]: Start difference. First operand 1544 states and 5748 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-01-28 15:40:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:18,462 INFO L93 Difference]: Finished difference Result 1308 states and 4722 transitions. [2022-01-28 15:40:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:40:18,462 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2022-01-28 15:40:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:18,468 INFO L225 Difference]: With dead ends: 1308 [2022-01-28 15:40:18,468 INFO L226 Difference]: Without dead ends: 1308 [2022-01-28 15:40:18,468 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:40:18,469 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:18,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 29 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:40:18,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-01-28 15:40:18,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 1118. [2022-01-28 15:40:18,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1118 states, 1117 states have (on average 3.6499552372426143) internal successors, (4077), 1117 states have internal predecessors, (4077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1118 states to 1118 states and 4077 transitions. [2022-01-28 15:40:18,493 INFO L78 Accepts]: Start accepts. Automaton has 1118 states and 4077 transitions. Word has length 24 [2022-01-28 15:40:18,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:18,493 INFO L470 AbstractCegarLoop]: Abstraction has 1118 states and 4077 transitions. [2022-01-28 15:40:18,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-01-28 15:40:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 1118 states and 4077 transitions. [2022-01-28 15:40:18,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-28 15:40:18,495 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:18,495 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:18,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-28 15:40:18,496 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:18,496 INFO L85 PathProgramCache]: Analyzing trace with hash 1043177095, now seen corresponding path program 2 times [2022-01-28 15:40:18,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:18,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067658867] [2022-01-28 15:40:18,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:18,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:18,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:18,523 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:18,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067658867] [2022-01-28 15:40:18,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067658867] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:18,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:40:18,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:40:18,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084403478] [2022-01-28 15:40:18,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:18,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:40:18,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:18,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:40:18,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:40:18,525 INFO L87 Difference]: Start difference. First operand 1118 states and 4077 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-01-28 15:40:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:18,570 INFO L93 Difference]: Finished difference Result 1142 states and 4135 transitions. [2022-01-28 15:40:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:40:18,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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 24 [2022-01-28 15:40:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:18,575 INFO L225 Difference]: With dead ends: 1142 [2022-01-28 15:40:18,575 INFO L226 Difference]: Without dead ends: 1120 [2022-01-28 15:40:18,576 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 [2022-01-28 15:40:18,576 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:18,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 22 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:40:18,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-01-28 15:40:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1104. [2022-01-28 15:40:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 3.665457842248413) internal successors, (4043), 1103 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:18,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 4043 transitions. [2022-01-28 15:40:18,599 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 4043 transitions. Word has length 24 [2022-01-28 15:40:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:18,599 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 4043 transitions. [2022-01-28 15:40:18,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 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) [2022-01-28 15:40:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 4043 transitions. [2022-01-28 15:40:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:18,602 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:18,602 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:18,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-28 15:40:18,602 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:18,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:18,603 INFO L85 PathProgramCache]: Analyzing trace with hash 2066683916, now seen corresponding path program 1 times [2022-01-28 15:40:18,603 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:18,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310177468] [2022-01-28 15:40:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:18,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:18,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:40:18,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:18,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310177468] [2022-01-28 15:40:18,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310177468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:18,624 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:40:18,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-28 15:40:18,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80066563] [2022-01-28 15:40:18,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:18,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:40:18,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:18,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:40:18,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:40:18,625 INFO L87 Difference]: Start difference. First operand 1104 states and 4043 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-01-28 15:40:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:18,660 INFO L93 Difference]: Finished difference Result 1334 states and 4929 transitions. [2022-01-28 15:40:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:40:18,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2022-01-28 15:40:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:18,666 INFO L225 Difference]: With dead ends: 1334 [2022-01-28 15:40:18,666 INFO L226 Difference]: Without dead ends: 1334 [2022-01-28 15:40:18,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-28 15:40:18,667 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:18,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:40:18,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1334 states. [2022-01-28 15:40:18,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1334 to 954. [2022-01-28 15:40:18,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 953 states have (on average 3.63903462749213) internal successors, (3468), 953 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) [2022-01-28 15:40:18,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 3468 transitions. [2022-01-28 15:40:18,687 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 3468 transitions. Word has length 27 [2022-01-28 15:40:18,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:18,688 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 3468 transitions. [2022-01-28 15:40:18,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-01-28 15:40:18,688 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 3468 transitions. [2022-01-28 15:40:18,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-28 15:40:18,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:18,690 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:18,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-28 15:40:18,690 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:18,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:18,691 INFO L85 PathProgramCache]: Analyzing trace with hash 1787495248, now seen corresponding path program 1 times [2022-01-28 15:40:18,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:18,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143225835] [2022-01-28 15:40:18,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:18,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:18,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:18,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:18,709 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143225835] [2022-01-28 15:40:18,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143225835] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:18,709 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963409785] [2022-01-28 15:40:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:18,709 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:18,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:18,710 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) [2022-01-28 15:40:18,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-28 15:40:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:18,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 3 conjunts are in the unsatisfiable core [2022-01-28 15:40:18,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:18,792 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-28 15:40:18,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963409785] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:18,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-28 15:40:18,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-01-28 15:40:18,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117526586] [2022-01-28 15:40:18,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:18,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:40:18,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:18,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:40:18,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:40:18,794 INFO L87 Difference]: Start difference. First operand 954 states and 3468 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-01-28 15:40:18,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:18,826 INFO L93 Difference]: Finished difference Result 1658 states and 5999 transitions. [2022-01-28 15:40:18,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:40:18,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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 27 [2022-01-28 15:40:18,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:18,834 INFO L225 Difference]: With dead ends: 1658 [2022-01-28 15:40:18,834 INFO L226 Difference]: Without dead ends: 1658 [2022-01-28 15:40:18,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:40:18,835 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 45 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:18,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 40 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:40:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1658 states. [2022-01-28 15:40:18,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1658 to 1112. [2022-01-28 15:40:18,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1111 states have (on average 3.667866786678668) internal successors, (4075), 1111 states have internal predecessors, (4075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:18,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 4075 transitions. [2022-01-28 15:40:18,859 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 4075 transitions. Word has length 27 [2022-01-28 15:40:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:18,859 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 4075 transitions. [2022-01-28 15:40:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 3 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) [2022-01-28 15:40:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 4075 transitions. [2022-01-28 15:40:18,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 15:40:18,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:18,862 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:18,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:19,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-01-28 15:40:19,079 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:19,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:19,079 INFO L85 PathProgramCache]: Analyzing trace with hash -383422002, now seen corresponding path program 1 times [2022-01-28 15:40:19,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:19,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915611656] [2022-01-28 15:40:19,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:19,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:19,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:19,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:19,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:19,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915611656] [2022-01-28 15:40:19,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915611656] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:19,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111156069] [2022-01-28 15:40:19,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:19,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:19,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:19,164 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) [2022-01-28 15:40:19,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-28 15:40:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:19,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:40:19,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:19,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 10 [2022-01-28 15:40:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:19,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:19,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:19,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 26 [2022-01-28 15:40:19,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:19,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-01-28 15:40:19,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-01-28 15:40:19,575 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:19,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111156069] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:19,576 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:19,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-28 15:40:19,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713986054] [2022-01-28 15:40:19,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:19,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 15:40:19,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:19,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 15:40:19,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:40:19,577 INFO L87 Difference]: Start difference. First operand 1112 states and 4075 transitions. Second operand has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2022-01-28 15:40:19,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:19,683 INFO L93 Difference]: Finished difference Result 2387 states and 8904 transitions. [2022-01-28 15:40:19,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:40:19,684 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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 29 [2022-01-28 15:40:19,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:19,691 INFO L225 Difference]: With dead ends: 2387 [2022-01-28 15:40:19,691 INFO L226 Difference]: Without dead ends: 2308 [2022-01-28 15:40:19,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:40:19,691 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 59 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:19,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 193 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:19,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2308 states. [2022-01-28 15:40:19,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2308 to 1550. [2022-01-28 15:40:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 3.7140090380890896) internal successors, (5753), 1549 states have internal predecessors, (5753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:19,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 5753 transitions. [2022-01-28 15:40:19,755 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 5753 transitions. Word has length 29 [2022-01-28 15:40:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:19,756 INFO L470 AbstractCegarLoop]: Abstraction has 1550 states and 5753 transitions. [2022-01-28 15:40:19,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.75) internal successors, (38), 7 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) [2022-01-28 15:40:19,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 5753 transitions. [2022-01-28 15:40:19,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 15:40:19,760 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:19,760 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:19,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:19,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:19,977 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:19,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash -1158240516, now seen corresponding path program 2 times [2022-01-28 15:40:19,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:19,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873534533] [2022-01-28 15:40:19,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:19,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:19,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:20,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:20,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873534533] [2022-01-28 15:40:20,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873534533] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:20,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732994259] [2022-01-28 15:40:20,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:40:20,056 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:20,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:20,057 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) [2022-01-28 15:40:20,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-28 15:40:20,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:40:20,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:20,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:40:20,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:20,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-28 15:40:20,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:20,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:20,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:20,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 32 [2022-01-28 15:40:20,386 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:20,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-01-28 15:40:20,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-01-28 15:40:20,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:20,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732994259] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:20,410 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:20,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-01-28 15:40:20,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113389749] [2022-01-28 15:40:20,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:20,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:40:20,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:20,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:40:20,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:20,411 INFO L87 Difference]: Start difference. First operand 1550 states and 5753 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:20,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:20,511 INFO L93 Difference]: Finished difference Result 2792 states and 10515 transitions. [2022-01-28 15:40:20,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:40:20,512 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-28 15:40:20,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:20,520 INFO L225 Difference]: With dead ends: 2792 [2022-01-28 15:40:20,520 INFO L226 Difference]: Without dead ends: 2713 [2022-01-28 15:40:20,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:20,521 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 93 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:20,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 172 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:20,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2713 states. [2022-01-28 15:40:20,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2713 to 1749. [2022-01-28 15:40:20,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1749 states, 1748 states have (on average 3.7299771167048057) internal successors, (6520), 1748 states have internal predecessors, (6520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1749 states to 1749 states and 6520 transitions. [2022-01-28 15:40:20,562 INFO L78 Accepts]: Start accepts. Automaton has 1749 states and 6520 transitions. Word has length 29 [2022-01-28 15:40:20,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:20,562 INFO L470 AbstractCegarLoop]: Abstraction has 1749 states and 6520 transitions. [2022-01-28 15:40:20,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:20,562 INFO L276 IsEmpty]: Start isEmpty. Operand 1749 states and 6520 transitions. [2022-01-28 15:40:20,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 15:40:20,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:20,567 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:20,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:20,779 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 [2022-01-28 15:40:20,779 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:20,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:20,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1824203434, now seen corresponding path program 3 times [2022-01-28 15:40:20,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:20,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088039746] [2022-01-28 15:40:20,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:20,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:20,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:20,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:20,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:20,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088039746] [2022-01-28 15:40:20,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088039746] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:20,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034157113] [2022-01-28 15:40:20,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:40:20,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:20,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:20,836 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) [2022-01-28 15:40:20,837 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-28 15:40:20,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:40:20,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:20,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:40:20,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:20,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-28 15:40:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:21,030 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:21,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:21,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 32 [2022-01-28 15:40:21,171 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:21,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-01-28 15:40:21,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-01-28 15:40:21,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:21,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034157113] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:21,194 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:21,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-01-28 15:40:21,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557837191] [2022-01-28 15:40:21,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:21,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:40:21,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:21,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:40:21,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:21,197 INFO L87 Difference]: Start difference. First operand 1749 states and 6520 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2022-01-28 15:40:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:21,286 INFO L93 Difference]: Finished difference Result 2570 states and 9639 transitions. [2022-01-28 15:40:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:40:21,286 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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 29 [2022-01-28 15:40:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:21,294 INFO L225 Difference]: With dead ends: 2570 [2022-01-28 15:40:21,294 INFO L226 Difference]: Without dead ends: 2491 [2022-01-28 15:40:21,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:21,295 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 94 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:21,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 160 Invalid, 196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:21,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2491 states. [2022-01-28 15:40:21,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2491 to 1887. [2022-01-28 15:40:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 3.7338282078472957) internal successors, (7042), 1886 states have internal predecessors, (7042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:21,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 7042 transitions. [2022-01-28 15:40:21,335 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 7042 transitions. Word has length 29 [2022-01-28 15:40:21,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:21,336 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 7042 transitions. [2022-01-28 15:40:21,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 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) [2022-01-28 15:40:21,336 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 7042 transitions. [2022-01-28 15:40:21,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 15:40:21,341 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:21,341 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:21,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:21,555 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,SelfDestructingSolverStorable11 [2022-01-28 15:40:21,556 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:21,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:21,556 INFO L85 PathProgramCache]: Analyzing trace with hash -614164824, now seen corresponding path program 4 times [2022-01-28 15:40:21,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:21,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779955686] [2022-01-28 15:40:21,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:21,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:21,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:21,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:21,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779955686] [2022-01-28 15:40:21,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779955686] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:21,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903540018] [2022-01-28 15:40:21,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:40:21,607 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:21,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:21,608 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) [2022-01-28 15:40:21,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-28 15:40:21,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:40:21,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:40:21,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:21,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2022-01-28 15:40:21,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:21,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:21,856 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:21,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 30 [2022-01-28 15:40:21,884 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:21,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-01-28 15:40:21,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-01-28 15:40:21,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:21,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903540018] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:21,934 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:21,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-01-28 15:40:21,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661291268] [2022-01-28 15:40:21,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:21,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:40:21,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:21,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:40:21,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:21,935 INFO L87 Difference]: Start difference. First operand 1887 states and 7042 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:22,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:22,076 INFO L93 Difference]: Finished difference Result 2992 states and 11283 transitions. [2022-01-28 15:40:22,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:40:22,076 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-28 15:40:22,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:22,085 INFO L225 Difference]: With dead ends: 2992 [2022-01-28 15:40:22,085 INFO L226 Difference]: Without dead ends: 2913 [2022-01-28 15:40:22,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:22,086 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 59 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:22,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 219 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:22,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2913 states. [2022-01-28 15:40:22,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2913 to 2081. [2022-01-28 15:40:22,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2081 states, 2080 states have (on average 3.751923076923077) internal successors, (7804), 2080 states have internal predecessors, (7804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:22,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 7804 transitions. [2022-01-28 15:40:22,130 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 7804 transitions. Word has length 29 [2022-01-28 15:40:22,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:22,131 INFO L470 AbstractCegarLoop]: Abstraction has 2081 states and 7804 transitions. [2022-01-28 15:40:22,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:22,131 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 7804 transitions. [2022-01-28 15:40:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 15:40:22,135 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:22,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:22,153 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:22,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:22,350 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:22,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:22,350 INFO L85 PathProgramCache]: Analyzing trace with hash -357509362, now seen corresponding path program 5 times [2022-01-28 15:40:22,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:22,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46633999] [2022-01-28 15:40:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:22,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:22,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:22,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46633999] [2022-01-28 15:40:22,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46633999] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:22,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716774446] [2022-01-28 15:40:22,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:40:22,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:22,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:22,414 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) [2022-01-28 15:40:22,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-28 15:40:22,441 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:40:22,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:22,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-28 15:40:22,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:22,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 14 [2022-01-28 15:40:22,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:22,573 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:22,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:22,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 30 [2022-01-28 15:40:22,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:22,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-01-28 15:40:22,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-01-28 15:40:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:22,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716774446] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:22,721 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:22,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2022-01-28 15:40:22,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465918037] [2022-01-28 15:40:22,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:22,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:40:22,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:40:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:22,722 INFO L87 Difference]: Start difference. First operand 2081 states and 7804 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2022-01-28 15:40:22,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:22,837 INFO L93 Difference]: Finished difference Result 2770 states and 10407 transitions. [2022-01-28 15:40:22,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:40:22,838 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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 29 [2022-01-28 15:40:22,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:22,845 INFO L225 Difference]: With dead ends: 2770 [2022-01-28 15:40:22,845 INFO L226 Difference]: Without dead ends: 2691 [2022-01-28 15:40:22,846 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:22,846 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 57 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 260 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:22,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 207 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 260 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:22,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2691 states. [2022-01-28 15:40:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2691 to 1882. [2022-01-28 15:40:22,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1882 states, 1881 states have (on average 3.741095162147794) internal successors, (7037), 1881 states have internal predecessors, (7037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:22,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1882 states to 1882 states and 7037 transitions. [2022-01-28 15:40:22,888 INFO L78 Accepts]: Start accepts. Automaton has 1882 states and 7037 transitions. Word has length 29 [2022-01-28 15:40:22,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:22,888 INFO L470 AbstractCegarLoop]: Abstraction has 1882 states and 7037 transitions. [2022-01-28 15:40:22,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 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) [2022-01-28 15:40:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 1882 states and 7037 transitions. [2022-01-28 15:40:22,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-01-28 15:40:22,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:22,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:22,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:23,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:23,108 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1162136574, now seen corresponding path program 6 times [2022-01-28 15:40:23,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:23,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655698555] [2022-01-28 15:40:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:23,109 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:23,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:23,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:23,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655698555] [2022-01-28 15:40:23,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655698555] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:23,162 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105431952] [2022-01-28 15:40:23,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:40:23,162 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:23,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:23,163 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) [2022-01-28 15:40:23,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-28 15:40:23,188 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-28 15:40:23,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:23,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 17 conjunts are in the unsatisfiable core [2022-01-28 15:40:23,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:23,264 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 12 [2022-01-28 15:40:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:23,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:23,382 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:23,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2022-01-28 15:40:23,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:23,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 14 [2022-01-28 15:40:23,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 3 [2022-01-28 15:40:23,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:23,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105431952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:23,501 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:23,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 7 [2022-01-28 15:40:23,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328180871] [2022-01-28 15:40:23,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:23,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-28 15:40:23,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:23,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-28 15:40:23,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:40:23,502 INFO L87 Difference]: Start difference. First operand 1882 states and 7037 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:23,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:23,621 INFO L93 Difference]: Finished difference Result 2635 states and 9856 transitions. [2022-01-28 15:40:23,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:40:23,622 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-01-28 15:40:23,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:23,629 INFO L225 Difference]: With dead ends: 2635 [2022-01-28 15:40:23,629 INFO L226 Difference]: Without dead ends: 2556 [2022-01-28 15:40:23,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:40:23,630 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 53 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:23,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 184 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:23,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2556 states. [2022-01-28 15:40:23,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2556 to 1926. [2022-01-28 15:40:23,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1926 states, 1925 states have (on average 3.7314285714285713) internal successors, (7183), 1925 states have internal predecessors, (7183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1926 states to 1926 states and 7183 transitions. [2022-01-28 15:40:23,686 INFO L78 Accepts]: Start accepts. Automaton has 1926 states and 7183 transitions. Word has length 29 [2022-01-28 15:40:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:23,686 INFO L470 AbstractCegarLoop]: Abstraction has 1926 states and 7183 transitions. [2022-01-28 15:40:23,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1926 states and 7183 transitions. [2022-01-28 15:40:23,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 15:40:23,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:23,690 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:23,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:23,910 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,SelfDestructingSolverStorable14 [2022-01-28 15:40:23,910 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:23,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:23,911 INFO L85 PathProgramCache]: Analyzing trace with hash 719206604, now seen corresponding path program 7 times [2022-01-28 15:40:23,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:23,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134154374] [2022-01-28 15:40:23,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:23,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:23,937 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:23,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:23,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134154374] [2022-01-28 15:40:23,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134154374] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:23,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949150460] [2022-01-28 15:40:23,938 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:40:23,938 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:23,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:23,939 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) [2022-01-28 15:40:23,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-28 15:40:23,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:23,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 4 conjunts are in the unsatisfiable core [2022-01-28 15:40:23,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:24,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:24,015 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:24,060 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:24,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949150460] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:24,060 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:24,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 6 [2022-01-28 15:40:24,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170428209] [2022-01-28 15:40:24,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:24,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-28 15:40:24,061 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:24,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-28 15:40:24,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-28 15:40:24,061 INFO L87 Difference]: Start difference. First operand 1926 states and 7183 transitions. Second operand has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:24,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:24,148 INFO L93 Difference]: Finished difference Result 3472 states and 12599 transitions. [2022-01-28 15:40:24,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-28 15:40:24,148 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-01-28 15:40:24,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:24,157 INFO L225 Difference]: With dead ends: 3472 [2022-01-28 15:40:24,158 INFO L226 Difference]: Without dead ends: 3318 [2022-01-28 15:40:24,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2022-01-28 15:40:24,158 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:24,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 74 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-28 15:40:24,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2022-01-28 15:40:24,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2796. [2022-01-28 15:40:24,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2796 states, 2795 states have (on average 3.759212880143113) internal successors, (10507), 2795 states have internal predecessors, (10507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:24,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2796 states to 2796 states and 10507 transitions. [2022-01-28 15:40:24,213 INFO L78 Accepts]: Start accepts. Automaton has 2796 states and 10507 transitions. Word has length 31 [2022-01-28 15:40:24,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:24,214 INFO L470 AbstractCegarLoop]: Abstraction has 2796 states and 10507 transitions. [2022-01-28 15:40:24,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 6.285714285714286) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:24,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2796 states and 10507 transitions. [2022-01-28 15:40:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-28 15:40:24,219 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:24,220 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:24,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:24,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-01-28 15:40:24,436 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:24,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:24,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1293130992, now seen corresponding path program 8 times [2022-01-28 15:40:24,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:24,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593571356] [2022-01-28 15:40:24,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:24,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:24,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:24,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:40:24,456 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:24,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593571356] [2022-01-28 15:40:24,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593571356] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:24,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-28 15:40:24,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-28 15:40:24,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919596190] [2022-01-28 15:40:24,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:24,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:40:24,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:24,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:40:24,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:40:24,457 INFO L87 Difference]: Start difference. First operand 2796 states and 10507 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2022-01-28 15:40:24,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:24,508 INFO L93 Difference]: Finished difference Result 5761 states and 21881 transitions. [2022-01-28 15:40:24,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:40:24,508 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 31 [2022-01-28 15:40:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:24,523 INFO L225 Difference]: With dead ends: 5761 [2022-01-28 15:40:24,523 INFO L226 Difference]: Without dead ends: 5510 [2022-01-28 15:40:24,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:40:24,523 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:24,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 52 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:40:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5510 states. [2022-01-28 15:40:24,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5510 to 4894. [2022-01-28 15:40:24,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4894 states, 4893 states have (on average 3.8779889638258735) internal successors, (18975), 4893 states have internal predecessors, (18975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:24,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4894 states to 4894 states and 18975 transitions. [2022-01-28 15:40:24,667 INFO L78 Accepts]: Start accepts. Automaton has 4894 states and 18975 transitions. Word has length 31 [2022-01-28 15:40:24,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:24,668 INFO L470 AbstractCegarLoop]: Abstraction has 4894 states and 18975 transitions. [2022-01-28 15:40:24,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2022-01-28 15:40:24,668 INFO L276 IsEmpty]: Start isEmpty. Operand 4894 states and 18975 transitions. [2022-01-28 15:40:24,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-28 15:40:24,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:24,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:24,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-28 15:40:24,679 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:24,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:24,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1002043648, now seen corresponding path program 9 times [2022-01-28 15:40:24,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:24,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556989003] [2022-01-28 15:40:24,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:24,680 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:24,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:24,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:40:24,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:24,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556989003] [2022-01-28 15:40:24,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556989003] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:24,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509509481] [2022-01-28 15:40:24,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:40:24,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:24,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:24,709 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) [2022-01-28 15:40:24,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-28 15:40:24,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:40:24,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:24,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:24,855 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:40:24,856 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:24,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-28 15:40:24,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509509481] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:24,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:24,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-28 15:40:24,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795795195] [2022-01-28 15:40:24,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:24,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:40:24,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:24,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:40:24,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:40:24,923 INFO L87 Difference]: Start difference. First operand 4894 states and 18975 transitions. Second operand has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:25,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:25,282 INFO L93 Difference]: Finished difference Result 17927 states and 66398 transitions. [2022-01-28 15:40:25,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:40:25,282 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-28 15:40:25,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:25,331 INFO L225 Difference]: With dead ends: 17927 [2022-01-28 15:40:25,331 INFO L226 Difference]: Without dead ends: 15301 [2022-01-28 15:40:25,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:40:25,331 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 147 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:25,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 160 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:25,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15301 states. [2022-01-28 15:40:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15301 to 8354. [2022-01-28 15:40:25,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8354 states, 8353 states have (on average 3.950676403687298) internal successors, (33000), 8353 states have internal predecessors, (33000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:25,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8354 states to 8354 states and 33000 transitions. [2022-01-28 15:40:25,659 INFO L78 Accepts]: Start accepts. Automaton has 8354 states and 33000 transitions. Word has length 34 [2022-01-28 15:40:25,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:25,660 INFO L470 AbstractCegarLoop]: Abstraction has 8354 states and 33000 transitions. [2022-01-28 15:40:25,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.1) internal successors, (61), 9 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:25,660 INFO L276 IsEmpty]: Start isEmpty. Operand 8354 states and 33000 transitions. [2022-01-28 15:40:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-28 15:40:25,679 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:25,679 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:25,695 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:25,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-28 15:40:25,891 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:25,892 INFO L85 PathProgramCache]: Analyzing trace with hash -129967119, now seen corresponding path program 10 times [2022-01-28 15:40:25,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:25,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915858652] [2022-01-28 15:40:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:25,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:25,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:40:25,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:25,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915858652] [2022-01-28 15:40:25,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915858652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:25,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80455863] [2022-01-28 15:40:25,921 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:40:25,921 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:25,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:25,922 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) [2022-01-28 15:40:25,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-28 15:40:25,950 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:40:25,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:25,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:25,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:40:26,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:40:26,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80455863] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:26,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:26,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-28 15:40:26,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74156304] [2022-01-28 15:40:26,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:26,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:40:26,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:26,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:40:26,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:40:26,085 INFO L87 Difference]: Start difference. First operand 8354 states and 33000 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:26,577 INFO L93 Difference]: Finished difference Result 21371 states and 81454 transitions. [2022-01-28 15:40:26,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:40:26,577 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-28 15:40:26,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:26,639 INFO L225 Difference]: With dead ends: 21371 [2022-01-28 15:40:26,639 INFO L226 Difference]: Without dead ends: 20932 [2022-01-28 15:40:26,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:40:26,640 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 350 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:26,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 83 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20932 states. [2022-01-28 15:40:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20932 to 12631. [2022-01-28 15:40:27,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12631 states, 12630 states have (on average 4.037925574030087) internal successors, (50999), 12630 states have internal predecessors, (50999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12631 states to 12631 states and 50999 transitions. [2022-01-28 15:40:27,192 INFO L78 Accepts]: Start accepts. Automaton has 12631 states and 50999 transitions. Word has length 34 [2022-01-28 15:40:27,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:27,193 INFO L470 AbstractCegarLoop]: Abstraction has 12631 states and 50999 transitions. [2022-01-28 15:40:27,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:27,193 INFO L276 IsEmpty]: Start isEmpty. Operand 12631 states and 50999 transitions. [2022-01-28 15:40:27,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-28 15:40:27,229 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:27,229 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:27,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2022-01-28 15:40:27,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:27,446 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:27,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:27,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1761367056, now seen corresponding path program 11 times [2022-01-28 15:40:27,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:27,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136950672] [2022-01-28 15:40:27,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:27,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:27,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:27,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:27,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136950672] [2022-01-28 15:40:27,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136950672] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:27,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282339973] [2022-01-28 15:40:27,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:40:27,468 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:27,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:27,469 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) [2022-01-28 15:40:27,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-28 15:40:27,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:40:27,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:27,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:27,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:27,600 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:27,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:27,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282339973] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:27,646 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:27,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-01-28 15:40:27,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499336217] [2022-01-28 15:40:27,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:27,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:40:27,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:27,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:40:27,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:27,647 INFO L87 Difference]: Start difference. First operand 12631 states and 50999 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2022-01-28 15:40:28,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:28,183 INFO L93 Difference]: Finished difference Result 20596 states and 79596 transitions. [2022-01-28 15:40:28,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:40:28,184 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) Word has length 34 [2022-01-28 15:40:28,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:28,245 INFO L225 Difference]: With dead ends: 20596 [2022-01-28 15:40:28,246 INFO L226 Difference]: Without dead ends: 20518 [2022-01-28 15:40:28,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:40:28,247 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 183 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:28,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 61 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:40:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20518 states. [2022-01-28 15:40:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20518 to 12577. [2022-01-28 15:40:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12577 states, 12576 states have (on average 4.042064249363868) internal successors, (50833), 12576 states have internal predecessors, (50833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12577 states to 12577 states and 50833 transitions. [2022-01-28 15:40:28,886 INFO L78 Accepts]: Start accepts. Automaton has 12577 states and 50833 transitions. Word has length 34 [2022-01-28 15:40:28,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:28,886 INFO L470 AbstractCegarLoop]: Abstraction has 12577 states and 50833 transitions. [2022-01-28 15:40:28,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 8 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) [2022-01-28 15:40:28,886 INFO L276 IsEmpty]: Start isEmpty. Operand 12577 states and 50833 transitions. [2022-01-28 15:40:28,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-28 15:40:28,949 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:28,949 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:28,965 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-01-28 15:40:29,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:29,150 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:29,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:29,150 INFO L85 PathProgramCache]: Analyzing trace with hash -447820591, now seen corresponding path program 12 times [2022-01-28 15:40:29,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:29,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227258747] [2022-01-28 15:40:29,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:29,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:29,248 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:29,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227258747] [2022-01-28 15:40:29,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227258747] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:29,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682367656] [2022-01-28 15:40:29,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:40:29,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:29,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:29,250 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) [2022-01-28 15:40:29,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-28 15:40:29,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:40:29,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:29,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:29,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:29,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:29,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682367656] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:29,429 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:29,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-01-28 15:40:29,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188943108] [2022-01-28 15:40:29,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:29,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:40:29,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:29,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:40:29,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:29,430 INFO L87 Difference]: Start difference. First operand 12577 states and 50833 transitions. Second operand has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:29,754 INFO L93 Difference]: Finished difference Result 22733 states and 87606 transitions. [2022-01-28 15:40:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:40:29,754 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-28 15:40:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:29,882 INFO L225 Difference]: With dead ends: 22733 [2022-01-28 15:40:29,882 INFO L226 Difference]: Without dead ends: 21028 [2022-01-28 15:40:29,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:40:29,883 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 210 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:29,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 99 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21028 states. [2022-01-28 15:40:30,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21028 to 15386. [2022-01-28 15:40:30,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15386 states, 15385 states have (on average 4.0534936626584335) internal successors, (62363), 15385 states have internal predecessors, (62363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:30,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 62363 transitions. [2022-01-28 15:40:30,463 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 62363 transitions. Word has length 34 [2022-01-28 15:40:30,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:30,464 INFO L470 AbstractCegarLoop]: Abstraction has 15386 states and 62363 transitions. [2022-01-28 15:40:30,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.111111111111111) internal successors, (55), 8 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:30,464 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 62363 transitions. [2022-01-28 15:40:30,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-28 15:40:30,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:30,580 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:30,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2022-01-28 15:40:30,781 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,SelfDestructingSolverStorable20 [2022-01-28 15:40:30,781 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:30,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:30,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1932805376, now seen corresponding path program 13 times [2022-01-28 15:40:30,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:30,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663813623] [2022-01-28 15:40:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:30,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:30,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:30,805 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:30,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:30,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663813623] [2022-01-28 15:40:30,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663813623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:30,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452682413] [2022-01-28 15:40:30,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:40:30,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:30,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:30,806 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) [2022-01-28 15:40:30,807 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-28 15:40:30,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:30,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:30,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:30,922 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:30,966 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:30,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452682413] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:30,966 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:30,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-01-28 15:40:30,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212411109] [2022-01-28 15:40:30,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:30,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-28 15:40:30,967 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:30,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-28 15:40:30,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-01-28 15:40:30,967 INFO L87 Difference]: Start difference. First operand 15386 states and 62363 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:31,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:31,461 INFO L93 Difference]: Finished difference Result 31402 states and 124083 transitions. [2022-01-28 15:40:31,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:40:31,462 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-28 15:40:31,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:31,562 INFO L225 Difference]: With dead ends: 31402 [2022-01-28 15:40:31,562 INFO L226 Difference]: Without dead ends: 31094 [2022-01-28 15:40:31,563 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:40:31,563 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 321 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:31,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 77 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:31,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31094 states. [2022-01-28 15:40:32,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31094 to 19812. [2022-01-28 15:40:32,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19812 states, 19811 states have (on average 4.119024784210792) internal successors, (81602), 19811 states have internal predecessors, (81602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:32,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19812 states to 19812 states and 81602 transitions. [2022-01-28 15:40:32,268 INFO L78 Accepts]: Start accepts. Automaton has 19812 states and 81602 transitions. Word has length 34 [2022-01-28 15:40:32,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:32,268 INFO L470 AbstractCegarLoop]: Abstraction has 19812 states and 81602 transitions. [2022-01-28 15:40:32,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:32,268 INFO L276 IsEmpty]: Start isEmpty. Operand 19812 states and 81602 transitions. [2022-01-28 15:40:32,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-28 15:40:32,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:32,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:32,328 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-01-28 15:40:32,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:32,513 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:32,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:32,513 INFO L85 PathProgramCache]: Analyzing trace with hash 19813248, now seen corresponding path program 14 times [2022-01-28 15:40:32,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:32,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691672097] [2022-01-28 15:40:32,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:32,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:32,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:40:32,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:32,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691672097] [2022-01-28 15:40:32,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691672097] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:32,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138296053] [2022-01-28 15:40:32,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:40:32,543 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:32,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:32,544 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) [2022-01-28 15:40:32,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-28 15:40:32,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:40:32,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:32,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:32,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:32,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:32,756 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:40:32,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138296053] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:32,757 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:32,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-01-28 15:40:32,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785716503] [2022-01-28 15:40:32,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:32,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:40:32,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:32,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:40:32,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:32,758 INFO L87 Difference]: Start difference. First operand 19812 states and 81602 transitions. Second operand has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:33,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:33,356 INFO L93 Difference]: Finished difference Result 33709 states and 133959 transitions. [2022-01-28 15:40:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:40:33,356 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-01-28 15:40:33,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:33,470 INFO L225 Difference]: With dead ends: 33709 [2022-01-28 15:40:33,470 INFO L226 Difference]: Without dead ends: 32656 [2022-01-28 15:40:33,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2022-01-28 15:40:33,471 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 175 mSDsluCounter, 239 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:33,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 102 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32656 states. [2022-01-28 15:40:34,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32656 to 23355. [2022-01-28 15:40:34,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23355 states, 23354 states have (on average 4.114370129314036) internal successors, (96087), 23354 states have internal predecessors, (96087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:34,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23355 states to 23355 states and 96087 transitions. [2022-01-28 15:40:34,208 INFO L78 Accepts]: Start accepts. Automaton has 23355 states and 96087 transitions. Word has length 34 [2022-01-28 15:40:34,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:34,209 INFO L470 AbstractCegarLoop]: Abstraction has 23355 states and 96087 transitions. [2022-01-28 15:40:34,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.888888888888889) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 23355 states and 96087 transitions. [2022-01-28 15:40:34,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-01-28 15:40:34,262 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:34,262 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:34,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-01-28 15:40:34,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:34,476 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:34,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:34,476 INFO L85 PathProgramCache]: Analyzing trace with hash -650007193, now seen corresponding path program 15 times [2022-01-28 15:40:34,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:34,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102328189] [2022-01-28 15:40:34,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:34,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:34,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-01-28 15:40:34,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102328189] [2022-01-28 15:40:34,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102328189] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:34,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482982003] [2022-01-28 15:40:34,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:40:34,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:34,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:34,501 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) [2022-01-28 15:40:34,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-28 15:40:34,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-28 15:40:34,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:34,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-01-28 15:40:34,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:34,625 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-28 15:40:34,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:34,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-01-28 15:40:34,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482982003] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:34,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:34,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 8 [2022-01-28 15:40:34,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712415972] [2022-01-28 15:40:34,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:34,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-28 15:40:34,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:34,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-28 15:40:34,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-01-28 15:40:34,682 INFO L87 Difference]: Start difference. First operand 23355 states and 96087 transitions. Second operand has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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) [2022-01-28 15:40:35,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:35,248 INFO L93 Difference]: Finished difference Result 31214 states and 125510 transitions. [2022-01-28 15:40:35,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:40:35,248 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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) Word has length 34 [2022-01-28 15:40:35,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:35,365 INFO L225 Difference]: With dead ends: 31214 [2022-01-28 15:40:35,365 INFO L226 Difference]: Without dead ends: 31106 [2022-01-28 15:40:35,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2022-01-28 15:40:35,366 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 164 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:35,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 73 Invalid, 396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-28 15:40:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31106 states. [2022-01-28 15:40:36,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31106 to 24543. [2022-01-28 15:40:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24543 states, 24542 states have (on average 4.135033819574606) internal successors, (101482), 24542 states have internal predecessors, (101482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:36,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24543 states to 24543 states and 101482 transitions. [2022-01-28 15:40:36,200 INFO L78 Accepts]: Start accepts. Automaton has 24543 states and 101482 transitions. Word has length 34 [2022-01-28 15:40:36,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:36,200 INFO L470 AbstractCegarLoop]: Abstraction has 24543 states and 101482 transitions. [2022-01-28 15:40:36,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.333333333333333) internal successors, (57), 8 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) [2022-01-28 15:40:36,200 INFO L276 IsEmpty]: Start isEmpty. Operand 24543 states and 101482 transitions. [2022-01-28 15:40:36,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-28 15:40:36,251 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:36,251 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:36,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:36,452 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,SelfDestructingSolverStorable23 [2022-01-28 15:40:36,452 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:36,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:36,452 INFO L85 PathProgramCache]: Analyzing trace with hash -2144646697, now seen corresponding path program 16 times [2022-01-28 15:40:36,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:36,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403782053] [2022-01-28 15:40:36,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:36,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-01-28 15:40:36,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:36,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403782053] [2022-01-28 15:40:36,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403782053] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:36,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256331438] [2022-01-28 15:40:36,479 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:40:36,479 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:36,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:36,480 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) [2022-01-28 15:40:36,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-28 15:40:36,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:40:36,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:36,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:40:36,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:36,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-01-28 15:40:36,550 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-28 15:40:36,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256331438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:36,551 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-28 15:40:36,551 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2022-01-28 15:40:36,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440741164] [2022-01-28 15:40:36,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:36,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-28 15:40:36,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:36,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-28 15:40:36,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:40:36,551 INFO L87 Difference]: Start difference. First operand 24543 states and 101482 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2022-01-28 15:40:36,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:36,878 INFO L93 Difference]: Finished difference Result 29524 states and 121533 transitions. [2022-01-28 15:40:36,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-28 15:40:36,878 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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 37 [2022-01-28 15:40:36,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:36,982 INFO L225 Difference]: With dead ends: 29524 [2022-01-28 15:40:36,983 INFO L226 Difference]: Without dead ends: 29524 [2022-01-28 15:40:36,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-28 15:40:36,983 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 31 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:36,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 37 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:40:37,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29524 states. [2022-01-28 15:40:37,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29524 to 22120. [2022-01-28 15:40:37,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22120 states, 22119 states have (on average 4.096252090962521) internal successors, (90605), 22119 states have internal predecessors, (90605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:37,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22120 states to 22120 states and 90605 transitions. [2022-01-28 15:40:37,639 INFO L78 Accepts]: Start accepts. Automaton has 22120 states and 90605 transitions. Word has length 37 [2022-01-28 15:40:37,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:37,639 INFO L470 AbstractCegarLoop]: Abstraction has 22120 states and 90605 transitions. [2022-01-28 15:40:37,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 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) [2022-01-28 15:40:37,639 INFO L276 IsEmpty]: Start isEmpty. Operand 22120 states and 90605 transitions. [2022-01-28 15:40:37,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-28 15:40:37,687 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:37,687 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:37,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-01-28 15:40:37,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:37,888 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:37,888 INFO L85 PathProgramCache]: Analyzing trace with hash -461619199, now seen corresponding path program 17 times [2022-01-28 15:40:37,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:37,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202531830] [2022-01-28 15:40:37,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:37,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:37,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-28 15:40:37,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:37,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202531830] [2022-01-28 15:40:37,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202531830] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:37,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345480212] [2022-01-28 15:40:37,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:40:37,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:37,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:37,917 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) [2022-01-28 15:40:37,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-28 15:40:37,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:40:37,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:37,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:40:37,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:38,004 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-01-28 15:40:38,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-01-28 15:40:38,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [345480212] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-28 15:40:38,004 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-01-28 15:40:38,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2022-01-28 15:40:38,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651175332] [2022-01-28 15:40:38,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-28 15:40:38,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-28 15:40:38,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:38,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-28 15:40:38,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:40:38,005 INFO L87 Difference]: Start difference. First operand 22120 states and 90605 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2022-01-28 15:40:38,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:38,342 INFO L93 Difference]: Finished difference Result 30000 states and 123549 transitions. [2022-01-28 15:40:38,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-28 15:40:38,342 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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 37 [2022-01-28 15:40:38,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:38,439 INFO L225 Difference]: With dead ends: 30000 [2022-01-28 15:40:38,439 INFO L226 Difference]: Without dead ends: 30000 [2022-01-28 15:40:38,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:40:38,440 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 51 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:38,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 57 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:40:38,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30000 states. [2022-01-28 15:40:38,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30000 to 24376. [2022-01-28 15:40:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24376 states, 24375 states have (on average 4.091979487179487) internal successors, (99742), 24375 states have internal predecessors, (99742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:39,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24376 states to 24376 states and 99742 transitions. [2022-01-28 15:40:39,260 INFO L78 Accepts]: Start accepts. Automaton has 24376 states and 99742 transitions. Word has length 37 [2022-01-28 15:40:39,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:39,260 INFO L470 AbstractCegarLoop]: Abstraction has 24376 states and 99742 transitions. [2022-01-28 15:40:39,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 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) [2022-01-28 15:40:39,261 INFO L276 IsEmpty]: Start isEmpty. Operand 24376 states and 99742 transitions. [2022-01-28 15:40:39,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-01-28 15:40:39,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:39,312 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:39,328 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:39,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:39,513 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:39,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:39,513 INFO L85 PathProgramCache]: Analyzing trace with hash -857424067, now seen corresponding path program 18 times [2022-01-28 15:40:39,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:39,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983322029] [2022-01-28 15:40:39,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:39,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:39,550 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 15:40:39,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:39,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983322029] [2022-01-28 15:40:39,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983322029] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:39,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109560930] [2022-01-28 15:40:39,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:40:39,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:39,550 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:39,551 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) [2022-01-28 15:40:39,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-28 15:40:39,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:40:39,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:39,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-28 15:40:39,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:39,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 15:40:39,622 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:39,667 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-01-28 15:40:39,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109560930] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:39,668 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:39,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2022-01-28 15:40:39,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963428788] [2022-01-28 15:40:39,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:39,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-28 15:40:39,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:39,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-28 15:40:39,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:40:39,668 INFO L87 Difference]: Start difference. First operand 24376 states and 99742 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-01-28 15:40:40,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:40,067 INFO L93 Difference]: Finished difference Result 37294 states and 154370 transitions. [2022-01-28 15:40:40,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-28 15:40:40,067 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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 37 [2022-01-28 15:40:40,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:40,223 INFO L225 Difference]: With dead ends: 37294 [2022-01-28 15:40:40,223 INFO L226 Difference]: Without dead ends: 37294 [2022-01-28 15:40:40,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-28 15:40:40,223 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 91 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:40,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 81 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-28 15:40:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37294 states. [2022-01-28 15:40:40,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37294 to 34517. [2022-01-28 15:40:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34517 states, 34516 states have (on average 4.136226677482907) internal successors, (142766), 34516 states have internal predecessors, (142766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:41,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34517 states to 34517 states and 142766 transitions. [2022-01-28 15:40:41,279 INFO L78 Accepts]: Start accepts. Automaton has 34517 states and 142766 transitions. Word has length 37 [2022-01-28 15:40:41,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:41,279 INFO L470 AbstractCegarLoop]: Abstraction has 34517 states and 142766 transitions. [2022-01-28 15:40:41,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 5 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) [2022-01-28 15:40:41,279 INFO L276 IsEmpty]: Start isEmpty. Operand 34517 states and 142766 transitions. [2022-01-28 15:40:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:40:41,364 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:41,364 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:41,380 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:41,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:41,565 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:41,565 INFO L85 PathProgramCache]: Analyzing trace with hash -709164033, now seen corresponding path program 19 times [2022-01-28 15:40:41,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:41,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127111718] [2022-01-28 15:40:41,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:41,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:41,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:41,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:41,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:41,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127111718] [2022-01-28 15:40:41,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127111718] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:41,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900559569] [2022-01-28 15:40:41,732 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:40:41,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:41,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:41,733 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) [2022-01-28 15:40:41,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-28 15:40:41,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:41,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:40:41,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:41,943 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:40:41,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-01-28 15:40:42,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:42,101 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:42,102 INFO L388 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 34 treesize of output 14 [2022-01-28 15:40:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:42,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:42,306 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:40:42,307 INFO L388 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 44 treesize of output 62 [2022-01-28 15:40:42,543 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:40:42,544 INFO L388 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 47 treesize of output 61 [2022-01-28 15:40:42,670 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:42,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900559569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:42,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:42,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-28 15:40:42,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782438041] [2022-01-28 15:40:42,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:42,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:40:42,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:42,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:40:42,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:40:42,671 INFO L87 Difference]: Start difference. First operand 34517 states and 142766 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:43,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:43,647 INFO L93 Difference]: Finished difference Result 57979 states and 239704 transitions. [2022-01-28 15:40:43,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:40:43,647 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:40:43,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:44,056 INFO L225 Difference]: With dead ends: 57979 [2022-01-28 15:40:44,056 INFO L226 Difference]: Without dead ends: 57787 [2022-01-28 15:40:44,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:40:44,060 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 186 mSDsluCounter, 1183 mSDsCounter, 0 mSdLazyCounter, 963 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 911 SdHoareTripleChecker+Invalid, 1101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 126 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:44,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 911 Invalid, 1101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 963 Invalid, 0 Unknown, 126 Unchecked, 0.5s Time] [2022-01-28 15:40:44,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57787 states. [2022-01-28 15:40:45,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57787 to 35063. [2022-01-28 15:40:45,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35063 states, 35062 states have (on average 4.133534881067822) internal successors, (144930), 35062 states have internal predecessors, (144930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:45,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35063 states to 35063 states and 144930 transitions. [2022-01-28 15:40:45,487 INFO L78 Accepts]: Start accepts. Automaton has 35063 states and 144930 transitions. Word has length 39 [2022-01-28 15:40:45,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:45,487 INFO L470 AbstractCegarLoop]: Abstraction has 35063 states and 144930 transitions. [2022-01-28 15:40:45,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:45,488 INFO L276 IsEmpty]: Start isEmpty. Operand 35063 states and 144930 transitions. [2022-01-28 15:40:45,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:40:45,571 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:45,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:45,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-28 15:40:45,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-01-28 15:40:45,772 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:45,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:45,773 INFO L85 PathProgramCache]: Analyzing trace with hash 868774019, now seen corresponding path program 20 times [2022-01-28 15:40:45,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:45,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543881567] [2022-01-28 15:40:45,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:45,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:45,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:45,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:45,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543881567] [2022-01-28 15:40:45,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543881567] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:45,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106172724] [2022-01-28 15:40:45,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:40:45,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:45,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:45,956 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) [2022-01-28 15:40:45,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-28 15:40:45,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:40:45,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:45,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:40:45,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:46,172 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:40:46,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-01-28 15:40:46,516 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:46,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:46,517 INFO L388 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 34 treesize of output 14 [2022-01-28 15:40:46,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:46,558 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:46,680 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:40:46,681 INFO L388 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 44 treesize of output 62 [2022-01-28 15:40:46,908 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:40:46,908 INFO L388 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 47 treesize of output 61 [2022-01-28 15:40:47,000 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:47,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106172724] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:47,001 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:47,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-28 15:40:47,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890679446] [2022-01-28 15:40:47,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:47,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:40:47,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:40:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:40:47,002 INFO L87 Difference]: Start difference. First operand 35063 states and 144930 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:47,725 INFO L93 Difference]: Finished difference Result 51473 states and 213928 transitions. [2022-01-28 15:40:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:40:47,726 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:40:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:47,965 INFO L225 Difference]: With dead ends: 51473 [2022-01-28 15:40:47,965 INFO L226 Difference]: Without dead ends: 51418 [2022-01-28 15:40:47,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:40:47,966 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 152 mSDsluCounter, 930 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 257 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:47,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 738 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 611 Invalid, 0 Unknown, 257 Unchecked, 0.2s Time] [2022-01-28 15:40:48,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51418 states. [2022-01-28 15:40:49,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51418 to 35819. [2022-01-28 15:40:49,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35819 states, 35818 states have (on average 4.1391479144564185) internal successors, (148256), 35818 states have internal predecessors, (148256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35819 states to 35819 states and 148256 transitions. [2022-01-28 15:40:49,209 INFO L78 Accepts]: Start accepts. Automaton has 35819 states and 148256 transitions. Word has length 39 [2022-01-28 15:40:49,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:49,209 INFO L470 AbstractCegarLoop]: Abstraction has 35819 states and 148256 transitions. [2022-01-28 15:40:49,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:49,209 INFO L276 IsEmpty]: Start isEmpty. Operand 35819 states and 148256 transitions. [2022-01-28 15:40:49,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:40:49,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:49,293 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:49,309 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-01-28 15:40:49,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-01-28 15:40:49,493 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:49,494 INFO L85 PathProgramCache]: Analyzing trace with hash -564546565, now seen corresponding path program 21 times [2022-01-28 15:40:49,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:49,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329304722] [2022-01-28 15:40:49,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:49,494 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:49,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:49,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329304722] [2022-01-28 15:40:49,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329304722] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:49,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538970258] [2022-01-28 15:40:49,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:40:49,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:49,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:49,633 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) [2022-01-28 15:40:49,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-28 15:40:49,660 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:40:49,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:49,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:40:49,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:49,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:49,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:49,924 INFO L388 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 35 [2022-01-28 15:40:50,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:50,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:50,374 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:50,375 INFO L388 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 32 treesize of output 14 [2022-01-28 15:40:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:50,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:50,543 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:40:50,544 INFO L388 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 44 treesize of output 62 [2022-01-28 15:40:51,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:51,032 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:51,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:51,039 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:51,039 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 41 [2022-01-28 15:40:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:51,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538970258] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:51,139 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:51,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 21 [2022-01-28 15:40:51,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721594346] [2022-01-28 15:40:51,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:51,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:40:51,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:51,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:40:51,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:40:51,140 INFO L87 Difference]: Start difference. First operand 35819 states and 148256 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:51,948 INFO L93 Difference]: Finished difference Result 48198 states and 199508 transitions. [2022-01-28 15:40:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:40:51,948 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:40:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:52,155 INFO L225 Difference]: With dead ends: 48198 [2022-01-28 15:40:52,156 INFO L226 Difference]: Without dead ends: 48195 [2022-01-28 15:40:52,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:40:52,156 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 249 mSDsluCounter, 964 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 472 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:52,157 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 730 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 469 Invalid, 0 Unknown, 472 Unchecked, 0.2s Time] [2022-01-28 15:40:52,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48195 states. [2022-01-28 15:40:53,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48195 to 36489. [2022-01-28 15:40:53,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36489 states, 36488 states have (on average 4.132317474238105) internal successors, (150780), 36488 states have internal predecessors, (150780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:53,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36489 states to 36489 states and 150780 transitions. [2022-01-28 15:40:53,343 INFO L78 Accepts]: Start accepts. Automaton has 36489 states and 150780 transitions. Word has length 39 [2022-01-28 15:40:53,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:53,343 INFO L470 AbstractCegarLoop]: Abstraction has 36489 states and 150780 transitions. [2022-01-28 15:40:53,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:53,343 INFO L276 IsEmpty]: Start isEmpty. Operand 36489 states and 150780 transitions. [2022-01-28 15:40:53,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:40:53,435 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:53,435 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:53,450 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-01-28 15:40:53,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:53,636 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:53,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:53,636 INFO L85 PathProgramCache]: Analyzing trace with hash -898797257, now seen corresponding path program 22 times [2022-01-28 15:40:53,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:53,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102242602] [2022-01-28 15:40:53,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:53,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:53,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:53,786 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:53,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102242602] [2022-01-28 15:40:53,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102242602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:53,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235771290] [2022-01-28 15:40:53,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:40:53,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:53,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:53,787 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) [2022-01-28 15:40:53,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-28 15:40:53,813 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:40:53,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:53,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:40:53,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:53,990 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:40:53,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-01-28 15:40:54,197 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:54,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:54,198 INFO L388 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 34 treesize of output 14 [2022-01-28 15:40:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:54,221 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:54,348 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:40:54,348 INFO L388 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 44 treesize of output 62 [2022-01-28 15:40:54,559 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:40:54,559 INFO L388 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 47 treesize of output 61 [2022-01-28 15:40:54,817 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:54,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235771290] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:54,817 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:54,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-28 15:40:54,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190608657] [2022-01-28 15:40:54,818 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:54,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:40:54,818 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:54,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:40:54,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:40:54,819 INFO L87 Difference]: Start difference. First operand 36489 states and 150780 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) [2022-01-28 15:40:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:40:55,392 INFO L93 Difference]: Finished difference Result 55125 states and 228658 transitions. [2022-01-28 15:40:55,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-28 15:40:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) Word has length 39 [2022-01-28 15:40:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:40:55,626 INFO L225 Difference]: With dead ends: 55125 [2022-01-28 15:40:55,626 INFO L226 Difference]: Without dead ends: 55122 [2022-01-28 15:40:55,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:40:55,627 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 169 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 701 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 148 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:40:55,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 664 Invalid, 701 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 545 Invalid, 0 Unknown, 148 Unchecked, 0.2s Time] [2022-01-28 15:40:55,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55122 states. [2022-01-28 15:40:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55122 to 36526. [2022-01-28 15:40:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36526 states, 36525 states have (on average 4.131170431211499) internal successors, (150891), 36525 states have internal predecessors, (150891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:40:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36526 states to 36526 states and 150891 transitions. [2022-01-28 15:40:56,970 INFO L78 Accepts]: Start accepts. Automaton has 36526 states and 150891 transitions. Word has length 39 [2022-01-28 15:40:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:40:56,970 INFO L470 AbstractCegarLoop]: Abstraction has 36526 states and 150891 transitions. [2022-01-28 15:40:56,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) [2022-01-28 15:40:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 36526 states and 150891 transitions. [2022-01-28 15:40:57,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:40:57,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:40:57,277 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:40:57,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-01-28 15:40:57,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:57,483 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:40:57,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:40:57,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1852048495, now seen corresponding path program 23 times [2022-01-28 15:40:57,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:40:57,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433243600] [2022-01-28 15:40:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:40:57,484 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:40:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:40:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:57,619 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:40:57,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433243600] [2022-01-28 15:40:57,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433243600] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:40:57,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267251962] [2022-01-28 15:40:57,619 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:40:57,620 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:40:57,620 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:40:57,620 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) [2022-01-28 15:40:57,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-28 15:40:57,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:40:57,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:40:57,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:40:57,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:40:57,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:57,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:57,790 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:57,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:40:57,799 INFO L388 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 26 treesize of output 44 [2022-01-28 15:40:58,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:58,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:58,071 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:58,071 INFO L388 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 26 treesize of output 14 [2022-01-28 15:40:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:58,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:40:58,429 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:58,430 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:58,450 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-01-28 15:40:58,451 INFO L388 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 39 treesize of output 51 [2022-01-28 15:40:58,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:58,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:58,975 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:40:58,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:40:58,977 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2022-01-28 15:40:59,158 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:40:59,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267251962] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:40:59,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:40:59,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-28 15:40:59,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945749122] [2022-01-28 15:40:59,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:40:59,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:40:59,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:40:59,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:40:59,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:40:59,159 INFO L87 Difference]: Start difference. First operand 36526 states and 150891 transitions. Second operand has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:00,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:00,613 INFO L93 Difference]: Finished difference Result 51278 states and 207096 transitions. [2022-01-28 15:41:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 15:41:00,613 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:00,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:00,968 INFO L225 Difference]: With dead ends: 51278 [2022-01-28 15:41:00,969 INFO L226 Difference]: Without dead ends: 51275 [2022-01-28 15:41:00,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=417, Invalid=2339, Unknown=0, NotChecked=0, Total=2756 [2022-01-28 15:41:00,970 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 469 mSDsluCounter, 2524 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 1903 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1064 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:00,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [469 Valid, 1880 Invalid, 1903 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 794 Invalid, 0 Unknown, 1064 Unchecked, 0.3s Time] [2022-01-28 15:41:01,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51275 states. [2022-01-28 15:41:01,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51275 to 37103. [2022-01-28 15:41:01,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37103 states, 37102 states have (on average 4.124656352757264) internal successors, (153033), 37102 states have internal predecessors, (153033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:02,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37103 states to 37103 states and 153033 transitions. [2022-01-28 15:41:02,263 INFO L78 Accepts]: Start accepts. Automaton has 37103 states and 153033 transitions. Word has length 39 [2022-01-28 15:41:02,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:02,263 INFO L470 AbstractCegarLoop]: Abstraction has 37103 states and 153033 transitions. [2022-01-28 15:41:02,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7857142857142856) internal successors, (106), 27 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:02,264 INFO L276 IsEmpty]: Start isEmpty. Operand 37103 states and 153033 transitions. [2022-01-28 15:41:02,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:02,356 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:02,356 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:02,372 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-01-28 15:41:02,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:02,557 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:02,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:02,557 INFO L85 PathProgramCache]: Analyzing trace with hash -2088011479, now seen corresponding path program 24 times [2022-01-28 15:41:02,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:02,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491251164] [2022-01-28 15:41:02,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:02,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:02,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:02,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:02,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491251164] [2022-01-28 15:41:02,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491251164] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:02,696 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906231042] [2022-01-28 15:41:02,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:41:02,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:02,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:02,697 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) [2022-01-28 15:41:02,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-28 15:41:02,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:41:02,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:02,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-28 15:41:02,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:02,903 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:41:02,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-01-28 15:41:03,110 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:41:03,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2022-01-28 15:41:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:03,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:03,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:03,993 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:41:03,993 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 43 [2022-01-28 15:41:04,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:04,647 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:41:04,648 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 41 treesize of output 41 [2022-01-28 15:41:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:04,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906231042] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:04,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:04,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 26 [2022-01-28 15:41:04,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003349121] [2022-01-28 15:41:04,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:04,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:41:04,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:04,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:41:04,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:41:04,682 INFO L87 Difference]: Start difference. First operand 37103 states and 153033 transitions. Second operand has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:05,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:05,744 INFO L93 Difference]: Finished difference Result 57932 states and 238518 transitions. [2022-01-28 15:41:05,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-28 15:41:05,744 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:05,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:05,992 INFO L225 Difference]: With dead ends: 57932 [2022-01-28 15:41:05,992 INFO L226 Difference]: Without dead ends: 57927 [2022-01-28 15:41:05,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=172, Invalid=1088, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 15:41:05,993 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 379 mSDsluCounter, 1534 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1174 SdHoareTripleChecker+Invalid, 1292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 620 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:05,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 1174 Invalid, 1292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 641 Invalid, 0 Unknown, 620 Unchecked, 0.3s Time] [2022-01-28 15:41:06,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57927 states. [2022-01-28 15:41:07,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57927 to 37958. [2022-01-28 15:41:07,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37958 states, 37957 states have (on average 4.125694865242248) internal successors, (156599), 37957 states have internal predecessors, (156599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:07,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37958 states to 37958 states and 156599 transitions. [2022-01-28 15:41:07,342 INFO L78 Accepts]: Start accepts. Automaton has 37958 states and 156599 transitions. Word has length 39 [2022-01-28 15:41:07,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:07,343 INFO L470 AbstractCegarLoop]: Abstraction has 37958 states and 156599 transitions. [2022-01-28 15:41:07,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:07,343 INFO L276 IsEmpty]: Start isEmpty. Operand 37958 states and 156599 transitions. [2022-01-28 15:41:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:07,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:07,432 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:07,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-01-28 15:41:07,633 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,SelfDestructingSolverStorable32 [2022-01-28 15:41:07,633 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:07,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:07,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1038211985, now seen corresponding path program 25 times [2022-01-28 15:41:07,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:07,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476130115] [2022-01-28 15:41:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:07,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:07,796 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:07,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476130115] [2022-01-28 15:41:07,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476130115] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243060528] [2022-01-28 15:41:07,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:41:07,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:07,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:07,798 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) [2022-01-28 15:41:07,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-28 15:41:07,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:07,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:41:07,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:08,283 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:08,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-01-28 15:41:08,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:08,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:08,418 INFO L388 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 34 treesize of output 14 [2022-01-28 15:41:08,455 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:08,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:08,633 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:08,633 INFO L388 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 50 treesize of output 68 [2022-01-28 15:41:08,833 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:08,834 INFO L388 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 47 treesize of output 61 [2022-01-28 15:41:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:08,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243060528] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:08,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:08,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-28 15:41:08,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482766172] [2022-01-28 15:41:08,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:08,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:41:08,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:08,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:41:08,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:41:08,920 INFO L87 Difference]: Start difference. First operand 37958 states and 156599 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:09,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:09,899 INFO L93 Difference]: Finished difference Result 63080 states and 260703 transitions. [2022-01-28 15:41:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:41:09,900 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:09,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:10,160 INFO L225 Difference]: With dead ends: 63080 [2022-01-28 15:41:10,160 INFO L226 Difference]: Without dead ends: 62888 [2022-01-28 15:41:10,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=460, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:41:10,161 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 244 mSDsluCounter, 1044 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 203 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:10,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 809 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 776 Invalid, 0 Unknown, 203 Unchecked, 0.3s Time] [2022-01-28 15:41:10,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62888 states. [2022-01-28 15:41:11,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62888 to 38305. [2022-01-28 15:41:11,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38305 states, 38304 states have (on average 4.1239818295739346) internal successors, (157965), 38304 states have internal predecessors, (157965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 157965 transitions. [2022-01-28 15:41:11,455 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 157965 transitions. Word has length 39 [2022-01-28 15:41:11,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:11,455 INFO L470 AbstractCegarLoop]: Abstraction has 38305 states and 157965 transitions. [2022-01-28 15:41:11,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 157965 transitions. [2022-01-28 15:41:11,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:11,543 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:11,543 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:11,559 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-28 15:41:11,744 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,SelfDestructingSolverStorable33 [2022-01-28 15:41:11,744 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:11,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:11,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1678817259, now seen corresponding path program 26 times [2022-01-28 15:41:11,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:11,744 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713366393] [2022-01-28 15:41:11,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:11,745 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:11,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:11,878 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:11,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713366393] [2022-01-28 15:41:11,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713366393] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:11,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598346526] [2022-01-28 15:41:11,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:41:11,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:11,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:11,880 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) [2022-01-28 15:41:11,880 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-28 15:41:11,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:41:11,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:11,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:41:11,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:12,311 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:12,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-01-28 15:41:12,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:12,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:12,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:12,445 INFO L388 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 34 treesize of output 14 [2022-01-28 15:41:12,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:12,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:12,646 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:12,647 INFO L388 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 50 treesize of output 68 [2022-01-28 15:41:12,839 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:12,840 INFO L388 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 47 treesize of output 61 [2022-01-28 15:41:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:12,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598346526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:12,918 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:12,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-28 15:41:12,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564415021] [2022-01-28 15:41:12,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:12,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:41:12,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:12,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:41:12,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:41:12,919 INFO L87 Difference]: Start difference. First operand 38305 states and 157965 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:13,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:13,779 INFO L93 Difference]: Finished difference Result 56963 states and 236485 transitions. [2022-01-28 15:41:13,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:41:13,780 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:13,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:14,022 INFO L225 Difference]: With dead ends: 56963 [2022-01-28 15:41:14,022 INFO L226 Difference]: Without dead ends: 56908 [2022-01-28 15:41:14,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:41:14,023 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 180 mSDsluCounter, 1066 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:14,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 829 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 788 Invalid, 0 Unknown, 108 Unchecked, 0.3s Time] [2022-01-28 15:41:14,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56908 states. [2022-01-28 15:41:15,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56908 to 39165. [2022-01-28 15:41:15,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39165 states, 39164 states have (on average 4.132264324379532) internal successors, (161836), 39164 states have internal predecessors, (161836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39165 states to 39165 states and 161836 transitions. [2022-01-28 15:41:15,312 INFO L78 Accepts]: Start accepts. Automaton has 39165 states and 161836 transitions. Word has length 39 [2022-01-28 15:41:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:15,313 INFO L470 AbstractCegarLoop]: Abstraction has 39165 states and 161836 transitions. [2022-01-28 15:41:15,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 39165 states and 161836 transitions. [2022-01-28 15:41:15,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:15,426 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:15,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:15,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-28 15:41:15,639 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,SelfDestructingSolverStorable34 [2022-01-28 15:41:15,640 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:15,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1182829453, now seen corresponding path program 27 times [2022-01-28 15:41:15,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:15,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870890898] [2022-01-28 15:41:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:15,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:15,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:15,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:15,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870890898] [2022-01-28 15:41:15,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870890898] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:15,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848122141] [2022-01-28 15:41:15,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:41:15,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:15,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:15,810 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) [2022-01-28 15:41:15,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-28 15:41:15,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:41:15,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:15,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:41:15,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:16,031 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-28 15:41:16,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 17 [2022-01-28 15:41:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:16,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:16,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:16,398 INFO L388 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 44 treesize of output 14 [2022-01-28 15:41:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:16,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:16,590 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:16,590 INFO L388 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 50 treesize of output 68 [2022-01-28 15:41:16,794 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:16,794 INFO L388 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 47 treesize of output 61 [2022-01-28 15:41:16,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:16,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848122141] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:16,879 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:16,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-28 15:41:16,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646520146] [2022-01-28 15:41:16,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:16,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:41:16,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:16,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:41:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:41:16,880 INFO L87 Difference]: Start difference. First operand 39165 states and 161836 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:17,685 INFO L93 Difference]: Finished difference Result 59031 states and 245063 transitions. [2022-01-28 15:41:17,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:41:17,685 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:17,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:17,954 INFO L225 Difference]: With dead ends: 59031 [2022-01-28 15:41:17,954 INFO L226 Difference]: Without dead ends: 58976 [2022-01-28 15:41:17,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:41:17,955 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 212 mSDsluCounter, 799 mSDsCounter, 0 mSdLazyCounter, 677 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 631 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 54 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:17,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 631 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 677 Invalid, 0 Unknown, 54 Unchecked, 0.3s Time] [2022-01-28 15:41:18,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58976 states. [2022-01-28 15:41:19,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58976 to 39342. [2022-01-28 15:41:19,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39342 states, 39341 states have (on average 4.132457232912229) internal successors, (162575), 39341 states have internal predecessors, (162575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:19,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39342 states to 39342 states and 162575 transitions. [2022-01-28 15:41:19,257 INFO L78 Accepts]: Start accepts. Automaton has 39342 states and 162575 transitions. Word has length 39 [2022-01-28 15:41:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:19,257 INFO L470 AbstractCegarLoop]: Abstraction has 39342 states and 162575 transitions. [2022-01-28 15:41:19,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 39342 states and 162575 transitions. [2022-01-28 15:41:19,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:19,346 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:19,346 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:19,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-01-28 15:41:19,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:19,547 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:19,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash 848578761, now seen corresponding path program 28 times [2022-01-28 15:41:19,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:19,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568450854] [2022-01-28 15:41:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:19,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:19,703 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:19,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:19,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568450854] [2022-01-28 15:41:19,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568450854] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:19,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1189041068] [2022-01-28 15:41:19,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:41:19,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:19,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:19,705 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) [2022-01-28 15:41:19,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-28 15:41:19,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:41:19,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:19,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:41:19,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:19,918 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:19,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-01-28 15:41:20,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:20,094 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:20,094 INFO L388 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 34 treesize of output 14 [2022-01-28 15:41:20,114 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:20,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:20,276 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:20,277 INFO L388 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 50 treesize of output 68 [2022-01-28 15:41:20,609 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:20,609 INFO L388 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 47 treesize of output 61 [2022-01-28 15:41:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:20,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1189041068] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:20,677 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:20,677 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-28 15:41:20,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710603904] [2022-01-28 15:41:20,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:20,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:41:20,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:20,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:41:20,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:41:20,678 INFO L87 Difference]: Start difference. First operand 39342 states and 162575 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:21,396 INFO L93 Difference]: Finished difference Result 63278 states and 263252 transitions. [2022-01-28 15:41:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:41:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:21,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:21,849 INFO L225 Difference]: With dead ends: 63278 [2022-01-28 15:41:21,850 INFO L226 Difference]: Without dead ends: 63223 [2022-01-28 15:41:21,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:41:21,850 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 219 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 810 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 316 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:21,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 769 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 810 Invalid, 0 Unknown, 316 Unchecked, 0.3s Time] [2022-01-28 15:41:21,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63223 states. [2022-01-28 15:41:22,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63223 to 38860. [2022-01-28 15:41:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38860 states, 38859 states have (on average 4.133868601868293) internal successors, (160638), 38859 states have internal predecessors, (160638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:23,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38860 states to 38860 states and 160638 transitions. [2022-01-28 15:41:23,190 INFO L78 Accepts]: Start accepts. Automaton has 38860 states and 160638 transitions. Word has length 39 [2022-01-28 15:41:23,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:23,190 INFO L470 AbstractCegarLoop]: Abstraction has 38860 states and 160638 transitions. [2022-01-28 15:41:23,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:23,190 INFO L276 IsEmpty]: Start isEmpty. Operand 38860 states and 160638 transitions. [2022-01-28 15:41:23,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:23,281 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:23,281 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:23,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-01-28 15:41:23,481 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,SelfDestructingSolverStorable36 [2022-01-28 15:41:23,481 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:23,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:23,482 INFO L85 PathProgramCache]: Analyzing trace with hash 630820215, now seen corresponding path program 29 times [2022-01-28 15:41:23,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:23,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230933589] [2022-01-28 15:41:23,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:23,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:23,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:23,647 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:23,648 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:23,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230933589] [2022-01-28 15:41:23,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230933589] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:23,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561701757] [2022-01-28 15:41:23,648 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:41:23,648 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:23,648 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:23,649 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) [2022-01-28 15:41:23,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-28 15:41:23,676 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:41:23,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:23,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:41:23,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:23,887 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:41:23,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2022-01-28 15:41:23,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:23,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:24,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:24,019 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:24,020 INFO L388 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 27 treesize of output 43 [2022-01-28 15:41:24,092 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:24,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:24,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:24,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:24,845 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:24,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:24,847 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 33 [2022-01-28 15:41:25,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:25,355 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:41:25,356 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 39 [2022-01-28 15:41:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:25,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561701757] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:25,387 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:25,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-01-28 15:41:25,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897715277] [2022-01-28 15:41:25,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:25,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:41:25,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:25,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:41:25,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:41:25,388 INFO L87 Difference]: Start difference. First operand 38860 states and 160638 transitions. Second operand has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:27,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:27,625 INFO L93 Difference]: Finished difference Result 88850 states and 370487 transitions. [2022-01-28 15:41:27,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-28 15:41:27,626 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:27,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:28,177 INFO L225 Difference]: With dead ends: 88850 [2022-01-28 15:41:28,177 INFO L226 Difference]: Without dead ends: 88510 [2022-01-28 15:41:28,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 68 SyntacticMatches, 8 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=479, Invalid=3061, Unknown=0, NotChecked=0, Total=3540 [2022-01-28 15:41:28,178 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 758 mSDsluCounter, 2474 mSDsCounter, 0 mSdLazyCounter, 1032 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 758 SdHoareTripleChecker+Valid, 1726 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1795 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:28,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [758 Valid, 1726 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1032 Invalid, 0 Unknown, 1795 Unchecked, 0.5s Time] [2022-01-28 15:41:28,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88510 states. [2022-01-28 15:41:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88510 to 39284. [2022-01-28 15:41:29,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39284 states, 39283 states have (on average 4.129165287783519) internal successors, (162206), 39283 states have internal predecessors, (162206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:29,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39284 states to 39284 states and 162206 transitions. [2022-01-28 15:41:29,777 INFO L78 Accepts]: Start accepts. Automaton has 39284 states and 162206 transitions. Word has length 39 [2022-01-28 15:41:29,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:29,777 INFO L470 AbstractCegarLoop]: Abstraction has 39284 states and 162206 transitions. [2022-01-28 15:41:29,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:29,777 INFO L276 IsEmpty]: Start isEmpty. Operand 39284 states and 162206 transitions. [2022-01-28 15:41:29,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:29,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:29,866 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:29,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-28 15:41:30,066 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,SelfDestructingSolverStorable37 [2022-01-28 15:41:30,066 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:30,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:30,067 INFO L85 PathProgramCache]: Analyzing trace with hash -156228847, now seen corresponding path program 30 times [2022-01-28 15:41:30,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:30,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804830294] [2022-01-28 15:41:30,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:30,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:30,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:30,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:30,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804830294] [2022-01-28 15:41:30,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804830294] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:30,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270084816] [2022-01-28 15:41:30,234 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:41:30,234 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:30,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:30,235 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) [2022-01-28 15:41:30,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-28 15:41:30,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-01-28 15:41:30,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:30,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:41:30,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:30,783 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-28 15:41:30,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 35 [2022-01-28 15:41:30,817 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:30,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-01-28 15:41:30,850 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:30,850 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:30,999 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:30,999 INFO L388 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 50 treesize of output 68 [2022-01-28 15:41:31,187 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:31,187 INFO L388 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 47 treesize of output 61 [2022-01-28 15:41:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:31,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270084816] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:31,258 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:31,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-28 15:41:31,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004553494] [2022-01-28 15:41:31,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:31,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:41:31,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:31,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:41:31,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:41:31,259 INFO L87 Difference]: Start difference. First operand 39284 states and 162206 transitions. Second operand has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:32,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:32,231 INFO L93 Difference]: Finished difference Result 67397 states and 278775 transitions. [2022-01-28 15:41:32,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-28 15:41:32,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:32,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:32,513 INFO L225 Difference]: With dead ends: 67397 [2022-01-28 15:41:32,513 INFO L226 Difference]: Without dead ends: 67237 [2022-01-28 15:41:32,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:41:32,514 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 221 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 672 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:32,514 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 672 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:41:32,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67237 states. [2022-01-28 15:41:33,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67237 to 39564. [2022-01-28 15:41:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39564 states, 39563 states have (on average 4.127846725475823) internal successors, (163310), 39563 states have internal predecessors, (163310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:33,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39564 states to 39564 states and 163310 transitions. [2022-01-28 15:41:33,854 INFO L78 Accepts]: Start accepts. Automaton has 39564 states and 163310 transitions. Word has length 39 [2022-01-28 15:41:33,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:33,854 INFO L470 AbstractCegarLoop]: Abstraction has 39564 states and 163310 transitions. [2022-01-28 15:41:33,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.619047619047619) internal successors, (76), 20 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:33,854 INFO L276 IsEmpty]: Start isEmpty. Operand 39564 states and 163310 transitions. [2022-01-28 15:41:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:33,945 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:33,945 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:33,960 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-28 15:41:34,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-28 15:41:34,146 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1634145011, now seen corresponding path program 31 times [2022-01-28 15:41:34,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:34,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907674627] [2022-01-28 15:41:34,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:34,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:34,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:34,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:34,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907674627] [2022-01-28 15:41:34,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907674627] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:34,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058753345] [2022-01-28 15:41:34,290 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:41:34,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:34,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:34,291 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) [2022-01-28 15:41:34,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-28 15:41:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:34,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:41:34,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:34,633 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:34,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 35 [2022-01-28 15:41:34,829 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:34,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-01-28 15:41:34,869 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:34,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:35,017 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:35,017 INFO L388 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 50 treesize of output 68 [2022-01-28 15:41:35,207 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:35,207 INFO L388 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 47 treesize of output 61 [2022-01-28 15:41:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:35,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058753345] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:35,288 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:35,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-28 15:41:35,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086627307] [2022-01-28 15:41:35,288 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:35,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:41:35,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:35,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:41:35,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=355, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:41:35,289 INFO L87 Difference]: Start difference. First operand 39564 states and 163310 transitions. Second operand has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:36,331 INFO L93 Difference]: Finished difference Result 67175 states and 277414 transitions. [2022-01-28 15:41:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:41:36,331 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:36,612 INFO L225 Difference]: With dead ends: 67175 [2022-01-28 15:41:36,612 INFO L226 Difference]: Without dead ends: 67085 [2022-01-28 15:41:36,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 6 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:41:36,612 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 249 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:36,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 763 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:41:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67085 states. [2022-01-28 15:41:37,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67085 to 39570. [2022-01-28 15:41:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39570 states, 39569 states have (on average 4.1304051151153685) internal successors, (163436), 39569 states have internal predecessors, (163436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:37,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39570 states to 39570 states and 163436 transitions. [2022-01-28 15:41:37,973 INFO L78 Accepts]: Start accepts. Automaton has 39570 states and 163436 transitions. Word has length 39 [2022-01-28 15:41:37,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:37,973 INFO L470 AbstractCegarLoop]: Abstraction has 39570 states and 163436 transitions. [2022-01-28 15:41:37,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5238095238095237) internal successors, (74), 20 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:37,973 INFO L276 IsEmpty]: Start isEmpty. Operand 39570 states and 163436 transitions. [2022-01-28 15:41:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:38,072 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:38,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:38,090 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-28 15:41:38,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-01-28 15:41:38,273 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:38,273 INFO L85 PathProgramCache]: Analyzing trace with hash -249818799, now seen corresponding path program 32 times [2022-01-28 15:41:38,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:38,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011765872] [2022-01-28 15:41:38,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:38,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:38,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:38,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:38,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011765872] [2022-01-28 15:41:38,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011765872] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:38,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395531434] [2022-01-28 15:41:38,415 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:41:38,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:38,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:38,416 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) [2022-01-28 15:41:38,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-28 15:41:38,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:41:38,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:38,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:41:38,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:38,732 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:38,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 25 [2022-01-28 15:41:38,783 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:38,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-01-28 15:41:38,816 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:38,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:38,951 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:38,951 INFO L388 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 50 treesize of output 68 [2022-01-28 15:41:39,313 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:39,313 INFO L388 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 47 treesize of output 61 [2022-01-28 15:41:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:39,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395531434] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:39,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:39,401 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-28 15:41:39,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192902145] [2022-01-28 15:41:39,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:39,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:41:39,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:39,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:41:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:41:39,402 INFO L87 Difference]: Start difference. First operand 39570 states and 163436 transitions. Second operand has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:40,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:40,127 INFO L93 Difference]: Finished difference Result 55429 states and 230154 transitions. [2022-01-28 15:41:40,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-28 15:41:40,128 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:40,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:40,558 INFO L225 Difference]: With dead ends: 55429 [2022-01-28 15:41:40,558 INFO L226 Difference]: Without dead ends: 55374 [2022-01-28 15:41:40,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:41:40,559 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 162 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 873 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 882 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 873 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:40,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 658 Invalid, 882 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 873 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-28 15:41:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55374 states. [2022-01-28 15:41:41,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55374 to 39590. [2022-01-28 15:41:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39590 states, 39589 states have (on average 4.127106014296901) internal successors, (163388), 39589 states have internal predecessors, (163388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39590 states to 39590 states and 163388 transitions. [2022-01-28 15:41:41,948 INFO L78 Accepts]: Start accepts. Automaton has 39590 states and 163388 transitions. Word has length 39 [2022-01-28 15:41:41,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:41,948 INFO L470 AbstractCegarLoop]: Abstraction has 39590 states and 163388 transitions. [2022-01-28 15:41:41,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.7) internal successors, (74), 19 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 39590 states and 163388 transitions. [2022-01-28 15:41:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:42,042 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:42,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:42,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-01-28 15:41:42,243 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,SelfDestructingSolverStorable40 [2022-01-28 15:41:42,243 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:42,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:42,244 INFO L85 PathProgramCache]: Analyzing trace with hash 1106922573, now seen corresponding path program 33 times [2022-01-28 15:41:42,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:42,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959412930] [2022-01-28 15:41:42,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:42,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:42,377 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:42,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:42,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959412930] [2022-01-28 15:41:42,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959412930] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:42,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197149793] [2022-01-28 15:41:42,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:41:42,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:42,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:42,378 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) [2022-01-28 15:41:42,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-28 15:41:42,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:41:42,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:42,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-28 15:41:42,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:42,687 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-28 15:41:42,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 31 [2022-01-28 15:41:42,737 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:41:42,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2022-01-28 15:41:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:42,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:43,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:43,504 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:41:43,505 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 49 [2022-01-28 15:41:43,677 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:43,677 INFO L388 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 48 treesize of output 62 [2022-01-28 15:41:43,734 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:43,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197149793] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:43,734 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:43,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-28 15:41:43,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478244449] [2022-01-28 15:41:43,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:43,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:41:43,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:43,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:41:43,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:41:43,736 INFO L87 Difference]: Start difference. First operand 39590 states and 163388 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:44,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:44,787 INFO L93 Difference]: Finished difference Result 68005 states and 281081 transitions. [2022-01-28 15:41:44,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-28 15:41:44,788 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:44,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:45,248 INFO L225 Difference]: With dead ends: 68005 [2022-01-28 15:41:45,248 INFO L226 Difference]: Without dead ends: 67950 [2022-01-28 15:41:45,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 60 SyntacticMatches, 8 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2022-01-28 15:41:45,248 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 338 mSDsluCounter, 1152 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 433 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:45,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 903 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 549 Invalid, 0 Unknown, 433 Unchecked, 0.4s Time] [2022-01-28 15:41:45,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67950 states. [2022-01-28 15:41:46,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67950 to 40559. [2022-01-28 15:41:46,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40559 states, 40558 states have (on average 4.133315252231372) internal successors, (167639), 40558 states have internal predecessors, (167639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:46,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40559 states to 40559 states and 167639 transitions. [2022-01-28 15:41:46,799 INFO L78 Accepts]: Start accepts. Automaton has 40559 states and 167639 transitions. Word has length 39 [2022-01-28 15:41:46,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:46,799 INFO L470 AbstractCegarLoop]: Abstraction has 40559 states and 167639 transitions. [2022-01-28 15:41:46,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:46,799 INFO L276 IsEmpty]: Start isEmpty. Operand 40559 states and 167639 transitions. [2022-01-28 15:41:46,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:46,923 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:46,923 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:46,939 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2022-01-28 15:41:47,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:47,139 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:47,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:47,139 INFO L85 PathProgramCache]: Analyzing trace with hash -326398011, now seen corresponding path program 34 times [2022-01-28 15:41:47,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:47,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651388671] [2022-01-28 15:41:47,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:47,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:47,275 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:47,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:47,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651388671] [2022-01-28 15:41:47,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651388671] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:47,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969864124] [2022-01-28 15:41:47,275 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:41:47,275 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:47,275 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:47,276 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) [2022-01-28 15:41:47,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-28 15:41:47,302 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:41:47,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:47,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:41:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:47,604 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:47,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-01-28 15:41:47,664 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:47,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-01-28 15:41:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:47,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:47,825 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:47,825 INFO L388 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 50 treesize of output 68 [2022-01-28 15:41:48,018 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:48,019 INFO L388 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 47 treesize of output 61 [2022-01-28 15:41:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:48,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969864124] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:48,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:48,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-28 15:41:48,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72516125] [2022-01-28 15:41:48,111 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:48,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:41:48,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:48,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:41:48,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:41:48,112 INFO L87 Difference]: Start difference. First operand 40559 states and 167639 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:49,097 INFO L93 Difference]: Finished difference Result 68421 states and 284264 transitions. [2022-01-28 15:41:49,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:41:49,098 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:49,571 INFO L225 Difference]: With dead ends: 68421 [2022-01-28 15:41:49,572 INFO L226 Difference]: Without dead ends: 68366 [2022-01-28 15:41:49,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:41:49,573 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 191 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:49,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 698 Invalid, 932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 922 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:41:49,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68366 states. [2022-01-28 15:41:50,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68366 to 39838. [2022-01-28 15:41:50,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39838 states, 39837 states have (on average 4.128724552551648) internal successors, (164476), 39837 states have internal predecessors, (164476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:51,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39838 states to 39838 states and 164476 transitions. [2022-01-28 15:41:51,022 INFO L78 Accepts]: Start accepts. Automaton has 39838 states and 164476 transitions. Word has length 39 [2022-01-28 15:41:51,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:51,022 INFO L470 AbstractCegarLoop]: Abstraction has 39838 states and 164476 transitions. [2022-01-28 15:41:51,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:51,022 INFO L276 IsEmpty]: Start isEmpty. Operand 39838 states and 164476 transitions. [2022-01-28 15:41:51,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:51,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:51,146 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:51,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-28 15:41:51,346 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,SelfDestructingSolverStorable42 [2022-01-28 15:41:51,347 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:51,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:51,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1698692599, now seen corresponding path program 35 times [2022-01-28 15:41:51,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:51,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128069954] [2022-01-28 15:41:51,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:51,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:51,482 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:51,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:51,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128069954] [2022-01-28 15:41:51,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128069954] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:51,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514572955] [2022-01-28 15:41:51,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:41:51,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:51,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:51,488 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) [2022-01-28 15:41:51,489 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-28 15:41:51,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:41:51,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:51,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-28 15:41:51,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:51,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:51,903 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:51,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:51,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:51,904 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2022-01-28 15:41:51,945 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:41:51,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 31 [2022-01-28 15:41:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:52,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:52,409 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:52,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:52,410 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:52,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:52,419 INFO L388 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 51 treesize of output 63 [2022-01-28 15:41:53,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:53,193 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:41:53,193 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 15:41:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:53,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514572955] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:53,270 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:53,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-01-28 15:41:53,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004439290] [2022-01-28 15:41:53,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:53,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:41:53,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:53,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:41:53,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:41:53,271 INFO L87 Difference]: Start difference. First operand 39838 states and 164476 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 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) [2022-01-28 15:41:54,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:54,253 INFO L93 Difference]: Finished difference Result 54806 states and 225522 transitions. [2022-01-28 15:41:54,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-28 15:41:54,254 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 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) Word has length 39 [2022-01-28 15:41:54,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:54,618 INFO L225 Difference]: With dead ends: 54806 [2022-01-28 15:41:54,618 INFO L226 Difference]: Without dead ends: 54751 [2022-01-28 15:41:54,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=1631, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 15:41:54,619 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 367 mSDsluCounter, 1934 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 1092 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:54,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 1661 Invalid, 1092 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 386 Invalid, 0 Unknown, 683 Unchecked, 0.1s Time] [2022-01-28 15:41:54,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54751 states. [2022-01-28 15:41:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54751 to 40590. [2022-01-28 15:41:55,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40590 states, 40589 states have (on average 4.13156273867304) internal successors, (167696), 40589 states have internal predecessors, (167696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:55,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40590 states to 40590 states and 167696 transitions. [2022-01-28 15:41:55,938 INFO L78 Accepts]: Start accepts. Automaton has 40590 states and 167696 transitions. Word has length 39 [2022-01-28 15:41:55,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:41:55,939 INFO L470 AbstractCegarLoop]: Abstraction has 40590 states and 167696 transitions. [2022-01-28 15:41:55,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 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) [2022-01-28 15:41:55,943 INFO L276 IsEmpty]: Start isEmpty. Operand 40590 states and 167696 transitions. [2022-01-28 15:41:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:41:56,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:41:56,062 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:41:56,077 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-28 15:41:56,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:56,263 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:41:56,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:41:56,263 INFO L85 PathProgramCache]: Analyzing trace with hash 421713277, now seen corresponding path program 36 times [2022-01-28 15:41:56,263 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:41:56,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137298628] [2022-01-28 15:41:56,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:41:56,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:41:56,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:41:56,408 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:56,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:41:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137298628] [2022-01-28 15:41:56,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137298628] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:41:56,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269631890] [2022-01-28 15:41:56,409 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:41:56,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:41:56,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:41:56,410 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) [2022-01-28 15:41:56,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-28 15:41:56,439 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 15:41:56,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:41:56,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-28 15:41:56,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:41:56,930 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:41:56,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 36 [2022-01-28 15:41:56,994 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:56,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:41:56,995 INFO L388 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 28 treesize of output 14 [2022-01-28 15:41:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:57,029 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:41:57,255 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:41:57,256 INFO L388 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 51 treesize of output 69 [2022-01-28 15:41:57,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:57,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:57,672 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:41:57,683 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:41:57,683 INFO L388 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 44 treesize of output 52 [2022-01-28 15:41:57,780 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:41:57,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269631890] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:41:57,780 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:41:57,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-28 15:41:57,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984789087] [2022-01-28 15:41:57,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:41:57,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:41:57,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:41:57,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:41:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:41:57,782 INFO L87 Difference]: Start difference. First operand 40590 states and 167696 transitions. Second operand has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:41:59,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:41:59,546 INFO L93 Difference]: Finished difference Result 90589 states and 373253 transitions. [2022-01-28 15:41:59,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-28 15:41:59,546 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:41:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:41:59,946 INFO L225 Difference]: With dead ends: 90589 [2022-01-28 15:41:59,946 INFO L226 Difference]: Without dead ends: 90499 [2022-01-28 15:41:59,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=239, Invalid=1741, Unknown=0, NotChecked=0, Total=1980 [2022-01-28 15:41:59,947 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 581 mSDsluCounter, 1791 mSDsCounter, 0 mSdLazyCounter, 699 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 581 SdHoareTripleChecker+Valid, 1362 SdHoareTripleChecker+Invalid, 1687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 699 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 954 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:41:59,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [581 Valid, 1362 Invalid, 1687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 699 Invalid, 0 Unknown, 954 Unchecked, 0.3s Time] [2022-01-28 15:42:00,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90499 states. [2022-01-28 15:42:01,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90499 to 47460. [2022-01-28 15:42:01,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47460 states, 47459 states have (on average 4.189742725299732) internal successors, (198841), 47459 states have internal predecessors, (198841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:02,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47460 states to 47460 states and 198841 transitions. [2022-01-28 15:42:02,032 INFO L78 Accepts]: Start accepts. Automaton has 47460 states and 198841 transitions. Word has length 39 [2022-01-28 15:42:02,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:02,032 INFO L470 AbstractCegarLoop]: Abstraction has 47460 states and 198841 transitions. [2022-01-28 15:42:02,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.64) internal successors, (91), 24 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:02,032 INFO L276 IsEmpty]: Start isEmpty. Operand 47460 states and 198841 transitions. [2022-01-28 15:42:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:02,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:02,152 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:02,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-01-28 15:42:02,352 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,SelfDestructingSolverStorable44 [2022-01-28 15:42:02,353 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1555025865, now seen corresponding path program 37 times [2022-01-28 15:42:02,353 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:02,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148023213] [2022-01-28 15:42:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:02,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:02,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:02,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148023213] [2022-01-28 15:42:02,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148023213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:02,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261173063] [2022-01-28 15:42:02,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:42:02,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:02,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:02,492 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) [2022-01-28 15:42:02,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-28 15:42:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:02,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:42:02,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:02,869 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:42:02,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 40 [2022-01-28 15:42:02,891 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:42:02,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-01-28 15:42:02,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:02,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:03,057 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:03,057 INFO L388 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 50 treesize of output 68 [2022-01-28 15:42:03,243 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:03,243 INFO L388 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 47 treesize of output 61 [2022-01-28 15:42:03,313 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:03,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261173063] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:03,313 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:03,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-28 15:42:03,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166137563] [2022-01-28 15:42:03,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:03,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:42:03,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:03,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:42:03,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:42:03,314 INFO L87 Difference]: Start difference. First operand 47460 states and 198841 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:04,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:04,544 INFO L93 Difference]: Finished difference Result 73297 states and 306987 transitions. [2022-01-28 15:42:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:42:04,544 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:42:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:05,056 INFO L225 Difference]: With dead ends: 73297 [2022-01-28 15:42:05,056 INFO L226 Difference]: Without dead ends: 73242 [2022-01-28 15:42:05,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:42:05,056 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 154 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 1172 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 897 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:05,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 897 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1172 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-28 15:42:05,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73242 states. [2022-01-28 15:42:06,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73242 to 45713. [2022-01-28 15:42:06,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45713 states, 45712 states have (on average 4.192312740637032) internal successors, (191639), 45712 states have internal predecessors, (191639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45713 states to 45713 states and 191639 transitions. [2022-01-28 15:42:06,640 INFO L78 Accepts]: Start accepts. Automaton has 45713 states and 191639 transitions. Word has length 39 [2022-01-28 15:42:06,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:06,640 INFO L470 AbstractCegarLoop]: Abstraction has 45713 states and 191639 transitions. [2022-01-28 15:42:06,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:06,641 INFO L276 IsEmpty]: Start isEmpty. Operand 45713 states and 191639 transitions. [2022-01-28 15:42:06,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:06,748 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:06,748 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:06,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-01-28 15:42:06,948 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,SelfDestructingSolverStorable45 [2022-01-28 15:42:06,948 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:06,949 INFO L85 PathProgramCache]: Analyzing trace with hash -150753277, now seen corresponding path program 38 times [2022-01-28 15:42:06,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:06,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489123579] [2022-01-28 15:42:06,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:06,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:06,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:07,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:07,123 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:07,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489123579] [2022-01-28 15:42:07,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489123579] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:07,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339622038] [2022-01-28 15:42:07,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:42:07,123 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:07,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:07,124 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) [2022-01-28 15:42:07,125 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-28 15:42:07,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:42:07,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:07,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:42:07,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:07,432 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:42:07,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-01-28 15:42:07,510 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:42:07,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-01-28 15:42:07,544 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:07,544 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:07,695 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:07,696 INFO L388 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 50 treesize of output 68 [2022-01-28 15:42:08,141 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:08,141 INFO L388 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 47 treesize of output 61 [2022-01-28 15:42:08,197 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:08,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339622038] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:08,198 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:08,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 21 [2022-01-28 15:42:08,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714197455] [2022-01-28 15:42:08,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:08,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-28 15:42:08,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:08,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-28 15:42:08,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:42:08,199 INFO L87 Difference]: Start difference. First operand 45713 states and 191639 transitions. Second operand has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:09,346 INFO L93 Difference]: Finished difference Result 79892 states and 333759 transitions. [2022-01-28 15:42:09,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:42:09,346 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:42:09,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:09,705 INFO L225 Difference]: With dead ends: 79892 [2022-01-28 15:42:09,705 INFO L226 Difference]: Without dead ends: 79676 [2022-01-28 15:42:09,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 6 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:42:09,706 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 243 mSDsluCounter, 1138 mSDsCounter, 0 mSdLazyCounter, 1097 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:09,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 878 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1097 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-28 15:42:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79676 states. [2022-01-28 15:42:11,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79676 to 45387. [2022-01-28 15:42:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45387 states, 45386 states have (on average 4.196514343630194) internal successors, (190463), 45386 states have internal predecessors, (190463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:11,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45387 states to 45387 states and 190463 transitions. [2022-01-28 15:42:11,357 INFO L78 Accepts]: Start accepts. Automaton has 45387 states and 190463 transitions. Word has length 39 [2022-01-28 15:42:11,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:11,357 INFO L470 AbstractCegarLoop]: Abstraction has 45387 states and 190463 transitions. [2022-01-28 15:42:11,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.590909090909091) internal successors, (79), 21 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:11,357 INFO L276 IsEmpty]: Start isEmpty. Operand 45387 states and 190463 transitions. [2022-01-28 15:42:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:11,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:11,695 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:11,711 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-01-28 15:42:11,910 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,SelfDestructingSolverStorable46 [2022-01-28 15:42:11,911 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:11,911 INFO L85 PathProgramCache]: Analyzing trace with hash -320883415, now seen corresponding path program 39 times [2022-01-28 15:42:11,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:11,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977282626] [2022-01-28 15:42:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:11,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:12,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:12,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977282626] [2022-01-28 15:42:12,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977282626] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:12,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537044687] [2022-01-28 15:42:12,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:42:12,043 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:12,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:12,044 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) [2022-01-28 15:42:12,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-28 15:42:12,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:42:12,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:12,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:42:12,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:12,275 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-28 15:42:12,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 17 [2022-01-28 15:42:12,440 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:12,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:12,441 INFO L388 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 32 treesize of output 14 [2022-01-28 15:42:12,463 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:12,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:12,573 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:12,573 INFO L388 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 44 treesize of output 62 [2022-01-28 15:42:12,777 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:12,777 INFO L388 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 47 treesize of output 61 [2022-01-28 15:42:12,841 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:12,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537044687] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:12,841 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:12,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-28 15:42:12,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084087652] [2022-01-28 15:42:12,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:12,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:42:12,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:12,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:42:12,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:42:12,842 INFO L87 Difference]: Start difference. First operand 45387 states and 190463 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) [2022-01-28 15:42:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:13,681 INFO L93 Difference]: Finished difference Result 61206 states and 257284 transitions. [2022-01-28 15:42:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:42:13,682 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) Word has length 39 [2022-01-28 15:42:13,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:13,942 INFO L225 Difference]: With dead ends: 61206 [2022-01-28 15:42:13,942 INFO L226 Difference]: Without dead ends: 61203 [2022-01-28 15:42:13,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:42:13,942 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 160 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 611 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 252 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:13,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 729 Invalid, 871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 611 Invalid, 0 Unknown, 252 Unchecked, 0.2s Time] [2022-01-28 15:42:14,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61203 states. [2022-01-28 15:42:15,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61203 to 44173. [2022-01-28 15:42:15,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44173 states, 44172 states have (on average 4.202707597573124) internal successors, (185642), 44172 states have internal predecessors, (185642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:15,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44173 states to 44173 states and 185642 transitions. [2022-01-28 15:42:15,366 INFO L78 Accepts]: Start accepts. Automaton has 44173 states and 185642 transitions. Word has length 39 [2022-01-28 15:42:15,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:15,366 INFO L470 AbstractCegarLoop]: Abstraction has 44173 states and 185642 transitions. [2022-01-28 15:42:15,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 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) [2022-01-28 15:42:15,367 INFO L276 IsEmpty]: Start isEmpty. Operand 44173 states and 185642 transitions. [2022-01-28 15:42:15,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:15,474 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:15,474 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:15,489 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-28 15:42:15,674 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,SelfDestructingSolverStorable47 [2022-01-28 15:42:15,675 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:15,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:15,675 INFO L85 PathProgramCache]: Analyzing trace with hash 2139636749, now seen corresponding path program 40 times [2022-01-28 15:42:15,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:15,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680898788] [2022-01-28 15:42:15,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:15,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:15,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:15,833 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:15,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680898788] [2022-01-28 15:42:15,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680898788] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:15,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327127034] [2022-01-28 15:42:15,833 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:42:15,834 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:15,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:15,835 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) [2022-01-28 15:42:15,835 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-28 15:42:15,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:42:15,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:15,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:42:15,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:16,271 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:42:16,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 17 [2022-01-28 15:42:16,397 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:16,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:16,398 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:16,399 INFO L388 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 34 treesize of output 14 [2022-01-28 15:42:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:16,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:16,628 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:16,628 INFO L388 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 60 treesize of output 78 [2022-01-28 15:42:16,802 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:16,802 INFO L388 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 47 treesize of output 61 [2022-01-28 15:42:16,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:16,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327127034] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:16,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:16,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-28 15:42:16,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452025225] [2022-01-28 15:42:16,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:16,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:42:16,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:42:16,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:42:16,886 INFO L87 Difference]: Start difference. First operand 44173 states and 185642 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:18,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:18,012 INFO L93 Difference]: Finished difference Result 75439 states and 315232 transitions. [2022-01-28 15:42:18,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:42:18,013 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:42:18,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:18,329 INFO L225 Difference]: With dead ends: 75439 [2022-01-28 15:42:18,329 INFO L226 Difference]: Without dead ends: 75247 [2022-01-28 15:42:18,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:42:18,330 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 259 mSDsluCounter, 1121 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:18,330 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 865 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 908 Invalid, 0 Unknown, 132 Unchecked, 0.4s Time] [2022-01-28 15:42:18,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75247 states. [2022-01-28 15:42:19,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75247 to 44722. [2022-01-28 15:42:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44722 states, 44721 states have (on average 4.199458867198855) internal successors, (187804), 44721 states have internal predecessors, (187804), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:20,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44722 states to 44722 states and 187804 transitions. [2022-01-28 15:42:20,164 INFO L78 Accepts]: Start accepts. Automaton has 44722 states and 187804 transitions. Word has length 39 [2022-01-28 15:42:20,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:20,164 INFO L470 AbstractCegarLoop]: Abstraction has 44722 states and 187804 transitions. [2022-01-28 15:42:20,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:20,164 INFO L276 IsEmpty]: Start isEmpty. Operand 44722 states and 187804 transitions. [2022-01-28 15:42:20,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:20,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:20,282 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:20,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-01-28 15:42:20,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-01-28 15:42:20,483 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:20,483 INFO L85 PathProgramCache]: Analyzing trace with hash -577392495, now seen corresponding path program 41 times [2022-01-28 15:42:20,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:20,483 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845164640] [2022-01-28 15:42:20,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:20,483 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:20,638 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:20,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:20,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845164640] [2022-01-28 15:42:20,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845164640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:20,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711584769] [2022-01-28 15:42:20,639 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:42:20,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:20,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:20,640 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) [2022-01-28 15:42:20,641 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-28 15:42:20,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:42:20,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:20,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-28 15:42:20,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:20,893 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:42:20,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-01-28 15:42:21,108 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:21,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:21,114 INFO L388 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 38 treesize of output 14 [2022-01-28 15:42:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:21,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:21,782 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:21,784 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:21,801 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-01-28 15:42:21,801 INFO L388 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 51 treesize of output 63 [2022-01-28 15:42:22,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:22,538 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:42:22,539 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 15:42:22,597 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:22,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711584769] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:22,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:22,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-28 15:42:22,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278976681] [2022-01-28 15:42:22,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:22,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:42:22,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:22,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:42:22,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:42:22,598 INFO L87 Difference]: Start difference. First operand 44722 states and 187804 transitions. Second operand has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:23,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:23,303 INFO L93 Difference]: Finished difference Result 52477 states and 217721 transitions. [2022-01-28 15:42:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 15:42:23,304 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:42:23,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:23,664 INFO L225 Difference]: With dead ends: 52477 [2022-01-28 15:42:23,664 INFO L226 Difference]: Without dead ends: 52458 [2022-01-28 15:42:23,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=1109, Unknown=0, NotChecked=0, Total=1332 [2022-01-28 15:42:23,664 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 404 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:23,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 930 Invalid, 844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 318 Invalid, 0 Unknown, 524 Unchecked, 0.1s Time] [2022-01-28 15:42:23,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52458 states. [2022-01-28 15:42:24,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52458 to 46590. [2022-01-28 15:42:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46590 states, 46589 states have (on average 4.183197750541973) internal successors, (194891), 46589 states have internal predecessors, (194891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46590 states to 46590 states and 194891 transitions. [2022-01-28 15:42:25,125 INFO L78 Accepts]: Start accepts. Automaton has 46590 states and 194891 transitions. Word has length 39 [2022-01-28 15:42:25,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:25,125 INFO L470 AbstractCegarLoop]: Abstraction has 46590 states and 194891 transitions. [2022-01-28 15:42:25,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.357142857142857) internal successors, (94), 27 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:25,125 INFO L276 IsEmpty]: Start isEmpty. Operand 46590 states and 194891 transitions. [2022-01-28 15:42:25,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:25,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:25,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:25,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2022-01-28 15:42:25,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-28 15:42:25,437 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:25,438 INFO L85 PathProgramCache]: Analyzing trace with hash -2010713079, now seen corresponding path program 42 times [2022-01-28 15:42:25,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:25,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349860024] [2022-01-28 15:42:25,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:25,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:25,581 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:25,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349860024] [2022-01-28 15:42:25,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349860024] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:25,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805154153] [2022-01-28 15:42:25,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:42:25,582 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:25,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:25,583 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) [2022-01-28 15:42:25,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-28 15:42:25,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:42:25,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:25,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:42:25,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:25,813 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:42:25,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 31 treesize of output 35 [2022-01-28 15:42:25,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:25,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:25,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:25,983 INFO L388 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 34 treesize of output 24 [2022-01-28 15:42:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:26,050 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:26,454 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:26,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:26,461 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-01-28 15:42:26,461 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 47 [2022-01-28 15:42:27,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:27,133 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:42:27,133 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 42 [2022-01-28 15:42:27,175 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:27,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805154153] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:27,176 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:27,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-28 15:42:27,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505187287] [2022-01-28 15:42:27,176 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:27,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:42:27,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:27,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:42:27,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:42:27,177 INFO L87 Difference]: Start difference. First operand 46590 states and 194891 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:29,025 INFO L93 Difference]: Finished difference Result 98333 states and 409591 transitions. [2022-01-28 15:42:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-28 15:42:29,025 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:42:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:29,648 INFO L225 Difference]: With dead ends: 98333 [2022-01-28 15:42:29,648 INFO L226 Difference]: Without dead ends: 98278 [2022-01-28 15:42:29,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 56 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=379, Invalid=2071, Unknown=0, NotChecked=0, Total=2450 [2022-01-28 15:42:29,649 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 736 mSDsluCounter, 1824 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 736 SdHoareTripleChecker+Valid, 1298 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 806 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:29,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [736 Valid, 1298 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 912 Invalid, 0 Unknown, 806 Unchecked, 0.4s Time] [2022-01-28 15:42:29,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98278 states. [2022-01-28 15:42:31,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98278 to 50645. [2022-01-28 15:42:31,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50645 states, 50644 states have (on average 4.195877102914462) internal successors, (212496), 50644 states have internal predecessors, (212496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:31,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50645 states to 50645 states and 212496 transitions. [2022-01-28 15:42:31,601 INFO L78 Accepts]: Start accepts. Automaton has 50645 states and 212496 transitions. Word has length 39 [2022-01-28 15:42:31,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:31,602 INFO L470 AbstractCegarLoop]: Abstraction has 50645 states and 212496 transitions. [2022-01-28 15:42:31,602 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:31,602 INFO L276 IsEmpty]: Start isEmpty. Operand 50645 states and 212496 transitions. [2022-01-28 15:42:32,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:32,014 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:32,014 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:32,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-01-28 15:42:32,214 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,SelfDestructingSolverStorable50 [2022-01-28 15:42:32,215 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:32,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:32,215 INFO L85 PathProgramCache]: Analyzing trace with hash 1732244979, now seen corresponding path program 43 times [2022-01-28 15:42:32,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:32,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986339375] [2022-01-28 15:42:32,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:32,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:32,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:32,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:32,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:32,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986339375] [2022-01-28 15:42:32,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986339375] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:32,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541135664] [2022-01-28 15:42:32,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:42:32,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:32,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:32,384 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) [2022-01-28 15:42:32,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-28 15:42:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:42:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:32,714 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:42:32,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-01-28 15:42:32,809 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:32,810 INFO L388 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 34 treesize of output 14 [2022-01-28 15:42:32,844 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:32,844 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:33,045 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:33,045 INFO L388 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 60 treesize of output 78 [2022-01-28 15:42:33,219 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:33,219 INFO L388 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 47 treesize of output 61 [2022-01-28 15:42:33,279 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:33,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541135664] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:33,280 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:33,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-28 15:42:33,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952858742] [2022-01-28 15:42:33,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:33,280 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:42:33,280 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:33,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:42:33,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:42:33,281 INFO L87 Difference]: Start difference. First operand 50645 states and 212496 transitions. Second operand has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:34,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:34,436 INFO L93 Difference]: Finished difference Result 91285 states and 381549 transitions. [2022-01-28 15:42:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:42:34,436 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:42:34,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:35,062 INFO L225 Difference]: With dead ends: 91285 [2022-01-28 15:42:35,062 INFO L226 Difference]: Without dead ends: 91195 [2022-01-28 15:42:35,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:42:35,063 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 281 mSDsluCounter, 1009 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 995 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 129 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:35,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [281 Valid, 800 Invalid, 995 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 844 Invalid, 0 Unknown, 129 Unchecked, 0.4s Time] [2022-01-28 15:42:35,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91195 states. [2022-01-28 15:42:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91195 to 51093. [2022-01-28 15:42:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51093 states, 51092 states have (on average 4.191301965082596) internal successors, (214142), 51092 states have internal predecessors, (214142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:36,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51093 states to 51093 states and 214142 transitions. [2022-01-28 15:42:36,967 INFO L78 Accepts]: Start accepts. Automaton has 51093 states and 214142 transitions. Word has length 39 [2022-01-28 15:42:36,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:36,967 INFO L470 AbstractCegarLoop]: Abstraction has 51093 states and 214142 transitions. [2022-01-28 15:42:36,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.7142857142857144) internal successors, (78), 20 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 51093 states and 214142 transitions. [2022-01-28 15:42:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:37,374 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:37,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:37,391 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-01-28 15:42:37,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:37,576 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:37,576 INFO L85 PathProgramCache]: Analyzing trace with hash 298924395, now seen corresponding path program 44 times [2022-01-28 15:42:37,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:37,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138202799] [2022-01-28 15:42:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:37,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:37,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:37,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:37,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138202799] [2022-01-28 15:42:37,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138202799] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:37,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880220164] [2022-01-28 15:42:37,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:42:37,739 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:37,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:37,740 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) [2022-01-28 15:42:37,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-28 15:42:37,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:42:37,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:37,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-28 15:42:37,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:38,036 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:42:38,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-01-28 15:42:38,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:38,196 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:38,196 INFO L388 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 44 treesize of output 14 [2022-01-28 15:42:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:38,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:38,449 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:38,449 INFO L388 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 60 treesize of output 78 [2022-01-28 15:42:38,624 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:38,625 INFO L388 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 47 treesize of output 61 [2022-01-28 15:42:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:38,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880220164] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:38,703 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:38,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-28 15:42:38,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515065353] [2022-01-28 15:42:38,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:38,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:42:38,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:38,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:42:38,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:42:38,704 INFO L87 Difference]: Start difference. First operand 51093 states and 214142 transitions. Second operand has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:39,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:39,960 INFO L93 Difference]: Finished difference Result 91146 states and 381032 transitions. [2022-01-28 15:42:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:42:39,960 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:42:39,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:40,601 INFO L225 Difference]: With dead ends: 91146 [2022-01-28 15:42:40,602 INFO L226 Difference]: Without dead ends: 91040 [2022-01-28 15:42:40,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:42:40,602 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 246 mSDsluCounter, 1288 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 997 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:40,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 997 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1083 Invalid, 0 Unknown, 128 Unchecked, 0.4s Time] [2022-01-28 15:42:40,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91040 states. [2022-01-28 15:42:42,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91040 to 50757. [2022-01-28 15:42:42,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50757 states, 50756 states have (on average 4.194499172511624) internal successors, (212896), 50756 states have internal predecessors, (212896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:42,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50757 states to 50757 states and 212896 transitions. [2022-01-28 15:42:42,462 INFO L78 Accepts]: Start accepts. Automaton has 50757 states and 212896 transitions. Word has length 39 [2022-01-28 15:42:42,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:42,462 INFO L470 AbstractCegarLoop]: Abstraction has 50757 states and 212896 transitions. [2022-01-28 15:42:42,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.9523809523809526) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:42,462 INFO L276 IsEmpty]: Start isEmpty. Operand 50757 states and 212896 transitions. [2022-01-28 15:42:42,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:42,862 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:42,862 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:42,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-28 15:42:43,075 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,SelfDestructingSolverStorable52 [2022-01-28 15:42:43,075 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:43,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:43,076 INFO L85 PathProgramCache]: Analyzing trace with hash 945195917, now seen corresponding path program 45 times [2022-01-28 15:42:43,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:43,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158419577] [2022-01-28 15:42:43,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:43,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:43,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:43,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158419577] [2022-01-28 15:42:43,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158419577] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:43,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514403579] [2022-01-28 15:42:43,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:42:43,229 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:43,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:43,233 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) [2022-01-28 15:42:43,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-28 15:42:43,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:42:43,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:43,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-28 15:42:43,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:43,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:43,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:43,689 INFO L388 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 64 treesize of output 60 [2022-01-28 15:42:43,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:43,802 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:43,802 INFO L388 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2022-01-28 15:42:43,883 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:43,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:45,332 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:45,333 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:45,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:45,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:45,340 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2022-01-28 15:42:45,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:45,798 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:45,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:45,805 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:45,806 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2022-01-28 15:42:45,887 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:45,887 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514403579] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:45,887 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:45,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-28 15:42:45,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997032863] [2022-01-28 15:42:45,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:45,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:42:45,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:45,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:42:45,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:42:45,888 INFO L87 Difference]: Start difference. First operand 50757 states and 212896 transitions. Second operand has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 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) [2022-01-28 15:42:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:48,474 INFO L93 Difference]: Finished difference Result 79844 states and 330082 transitions. [2022-01-28 15:42:48,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-28 15:42:48,474 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 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) Word has length 39 [2022-01-28 15:42:48,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:48,987 INFO L225 Difference]: With dead ends: 79844 [2022-01-28 15:42:48,987 INFO L226 Difference]: Without dead ends: 79648 [2022-01-28 15:42:48,988 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 11 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 872 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=471, Invalid=3069, Unknown=0, NotChecked=0, Total=3540 [2022-01-28 15:42:48,988 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 509 mSDsluCounter, 1686 mSDsCounter, 0 mSdLazyCounter, 344 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 509 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 344 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 827 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:48,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [509 Valid, 1421 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 344 Invalid, 0 Unknown, 827 Unchecked, 0.2s Time] [2022-01-28 15:42:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79648 states. [2022-01-28 15:42:50,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79648 to 52968. [2022-01-28 15:42:50,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52968 states, 52967 states have (on average 4.186625634829233) internal successors, (221753), 52967 states have internal predecessors, (221753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:50,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52968 states to 52968 states and 221753 transitions. [2022-01-28 15:42:50,877 INFO L78 Accepts]: Start accepts. Automaton has 52968 states and 221753 transitions. Word has length 39 [2022-01-28 15:42:50,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:50,877 INFO L470 AbstractCegarLoop]: Abstraction has 52968 states and 221753 transitions. [2022-01-28 15:42:50,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2758620689655173) internal successors, (95), 28 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) [2022-01-28 15:42:50,877 INFO L276 IsEmpty]: Start isEmpty. Operand 52968 states and 221753 transitions. [2022-01-28 15:42:51,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:51,428 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:51,428 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:51,446 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-01-28 15:42:51,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:51,643 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:51,644 INFO L85 PathProgramCache]: Analyzing trace with hash -314284015, now seen corresponding path program 46 times [2022-01-28 15:42:51,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:51,644 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863677849] [2022-01-28 15:42:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:51,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:51,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:51,875 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:51,875 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:51,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863677849] [2022-01-28 15:42:51,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863677849] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:51,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808154563] [2022-01-28 15:42:51,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:42:51,876 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:51,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:51,888 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) [2022-01-28 15:42:51,951 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-28 15:42:51,955 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:42:51,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:51,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:42:51,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:52,333 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:42:52,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 42 [2022-01-28 15:42:52,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:52,361 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:52,362 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:52,362 INFO L388 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 34 treesize of output 14 [2022-01-28 15:42:52,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:52,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:52,591 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:52,592 INFO L388 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 60 treesize of output 78 [2022-01-28 15:42:52,763 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:42:52,763 INFO L388 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 47 treesize of output 61 [2022-01-28 15:42:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:52,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808154563] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:52,835 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:52,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-28 15:42:52,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577518951] [2022-01-28 15:42:52,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:52,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:42:52,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:52,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:42:52,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:42:52,836 INFO L87 Difference]: Start difference. First operand 52968 states and 221753 transitions. Second operand has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:53,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:42:53,870 INFO L93 Difference]: Finished difference Result 81479 states and 340227 transitions. [2022-01-28 15:42:53,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:42:53,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:42:53,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:42:54,218 INFO L225 Difference]: With dead ends: 81479 [2022-01-28 15:42:54,218 INFO L226 Difference]: Without dead ends: 81237 [2022-01-28 15:42:54,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2022-01-28 15:42:54,219 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 234 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 1171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 330 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:42:54,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 868 Invalid, 1171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 825 Invalid, 0 Unknown, 330 Unchecked, 0.3s Time] [2022-01-28 15:42:54,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81237 states. [2022-01-28 15:42:55,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81237 to 50925. [2022-01-28 15:42:55,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50925 states, 50924 states have (on average 4.1944859005576935) internal successors, (213600), 50924 states have internal predecessors, (213600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50925 states to 50925 states and 213600 transitions. [2022-01-28 15:42:56,240 INFO L78 Accepts]: Start accepts. Automaton has 50925 states and 213600 transitions. Word has length 39 [2022-01-28 15:42:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:42:56,240 INFO L470 AbstractCegarLoop]: Abstraction has 50925 states and 213600 transitions. [2022-01-28 15:42:56,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.65) internal successors, (73), 19 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:42:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 50925 states and 213600 transitions. [2022-01-28 15:42:56,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:42:56,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:42:56,374 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:42:56,389 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-28 15:42:56,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:56,575 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:42:56,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:42:56,576 INFO L85 PathProgramCache]: Analyzing trace with hash -532720247, now seen corresponding path program 47 times [2022-01-28 15:42:56,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:42:56,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942975453] [2022-01-28 15:42:56,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:42:56,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:42:56,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:42:56,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:56,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:42:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942975453] [2022-01-28 15:42:56,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942975453] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:42:56,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327416016] [2022-01-28 15:42:56,731 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:42:56,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:42:56,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:42:56,733 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) [2022-01-28 15:42:56,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-28 15:42:56,760 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:42:56,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:42:56,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:42:56,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:42:57,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:57,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:57,068 INFO L388 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 44 treesize of output 48 [2022-01-28 15:42:57,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:57,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:57,135 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:42:57,136 INFO L388 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 41 treesize of output 55 [2022-01-28 15:42:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:57,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:42:58,470 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:58,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:58,477 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2022-01-28 15:42:58,478 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 51 [2022-01-28 15:42:58,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:58,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:58,856 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:42:58,857 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:42:58,857 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 20 [2022-01-28 15:42:58,874 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:42:58,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327416016] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:42:58,874 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:42:58,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-01-28 15:42:58,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201740712] [2022-01-28 15:42:58,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:42:58,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:42:58,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:42:58,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:42:58,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=724, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:42:58,875 INFO L87 Difference]: Start difference. First operand 50925 states and 213600 transitions. Second operand has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:03,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:03,650 INFO L93 Difference]: Finished difference Result 161143 states and 671911 transitions. [2022-01-28 15:43:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-28 15:43:03,650 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:43:03,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:04,448 INFO L225 Difference]: With dead ends: 161143 [2022-01-28 15:43:04,448 INFO L226 Difference]: Without dead ends: 160783 [2022-01-28 15:43:04,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1958 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1233, Invalid=5739, Unknown=0, NotChecked=0, Total=6972 [2022-01-28 15:43:04,449 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 1191 mSDsluCounter, 2722 mSDsCounter, 0 mSdLazyCounter, 1381 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1191 SdHoareTripleChecker+Valid, 1880 SdHoareTripleChecker+Invalid, 2923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 1381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1369 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:04,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1191 Valid, 1880 Invalid, 2923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 1381 Invalid, 0 Unknown, 1369 Unchecked, 0.7s Time] [2022-01-28 15:43:04,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160783 states. [2022-01-28 15:43:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160783 to 54115. [2022-01-28 15:43:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54115 states, 54114 states have (on average 4.201001589237536) internal successors, (227333), 54114 states have internal predecessors, (227333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:07,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54115 states to 54115 states and 227333 transitions. [2022-01-28 15:43:07,629 INFO L78 Accepts]: Start accepts. Automaton has 54115 states and 227333 transitions. Word has length 39 [2022-01-28 15:43:07,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:07,629 INFO L470 AbstractCegarLoop]: Abstraction has 54115 states and 227333 transitions. [2022-01-28 15:43:07,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:07,629 INFO L276 IsEmpty]: Start isEmpty. Operand 54115 states and 227333 transitions. [2022-01-28 15:43:08,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:43:08,029 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:08,030 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:08,045 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-01-28 15:43:08,230 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,SelfDestructingSolverStorable55 [2022-01-28 15:43:08,230 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:43:08,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:08,230 INFO L85 PathProgramCache]: Analyzing trace with hash 851605965, now seen corresponding path program 48 times [2022-01-28 15:43:08,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:08,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992083681] [2022-01-28 15:43:08,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:08,231 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:08,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:08,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:08,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992083681] [2022-01-28 15:43:08,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992083681] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:08,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476948428] [2022-01-28 15:43:08,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:43:08,375 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:08,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:08,376 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) [2022-01-28 15:43:08,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-28 15:43:08,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:43:08,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:08,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:43:08,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:08,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:08,957 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:08,957 INFO L388 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 37 treesize of output 25 [2022-01-28 15:43:09,021 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:09,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:43:09,027 INFO L388 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 34 [2022-01-28 15:43:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:09,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:09,635 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:09,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:09,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:43:09,648 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 57 [2022-01-28 15:43:10,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:10,179 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:10,197 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-01-28 15:43:10,197 INFO L388 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 48 treesize of output 56 [2022-01-28 15:43:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:10,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476948428] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:10,326 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:10,326 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-28 15:43:10,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020873854] [2022-01-28 15:43:10,327 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:10,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:43:10,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:10,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:43:10,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:43:10,327 INFO L87 Difference]: Start difference. First operand 54115 states and 227333 transitions. Second operand has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:11,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:11,588 INFO L93 Difference]: Finished difference Result 65039 states and 271373 transitions. [2022-01-28 15:43:11,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-28 15:43:11,591 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:43:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:11,847 INFO L225 Difference]: With dead ends: 65039 [2022-01-28 15:43:11,847 INFO L226 Difference]: Without dead ends: 65001 [2022-01-28 15:43:11,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 65 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=1610, Unknown=0, NotChecked=0, Total=1892 [2022-01-28 15:43:11,847 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 527 mSDsluCounter, 1320 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 724 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 526 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:11,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 1187 Invalid, 724 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 185 Invalid, 0 Unknown, 526 Unchecked, 0.1s Time] [2022-01-28 15:43:11,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65001 states. [2022-01-28 15:43:13,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65001 to 55408. [2022-01-28 15:43:13,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55408 states, 55407 states have (on average 4.202880502463588) internal successors, (232869), 55407 states have internal predecessors, (232869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:13,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55408 states to 55408 states and 232869 transitions. [2022-01-28 15:43:13,494 INFO L78 Accepts]: Start accepts. Automaton has 55408 states and 232869 transitions. Word has length 39 [2022-01-28 15:43:13,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:13,494 INFO L470 AbstractCegarLoop]: Abstraction has 55408 states and 232869 transitions. [2022-01-28 15:43:13,494 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.5) internal successors, (98), 27 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 55408 states and 232869 transitions. [2022-01-28 15:43:13,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:43:13,875 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:13,875 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:13,890 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:14,075 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,SelfDestructingSolverStorable56 [2022-01-28 15:43:14,076 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:43:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:14,076 INFO L85 PathProgramCache]: Analyzing trace with hash -581714619, now seen corresponding path program 49 times [2022-01-28 15:43:14,076 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:14,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135645793] [2022-01-28 15:43:14,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:14,076 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:14,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:14,225 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:14,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135645793] [2022-01-28 15:43:14,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135645793] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:14,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906266626] [2022-01-28 15:43:14,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:43:14,225 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:14,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:14,226 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) [2022-01-28 15:43:14,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-28 15:43:14,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:14,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:43:14,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:14,548 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:43:14,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 25 [2022-01-28 15:43:14,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:14,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:14,676 INFO L388 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 34 treesize of output 14 [2022-01-28 15:43:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:14,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:14,866 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:14,866 INFO L388 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 60 treesize of output 78 [2022-01-28 15:43:15,044 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:15,044 INFO L388 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 47 treesize of output 61 [2022-01-28 15:43:15,122 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:15,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906266626] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:15,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:15,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-28 15:43:15,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563978763] [2022-01-28 15:43:15,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:15,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:43:15,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:15,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:43:15,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:43:15,123 INFO L87 Difference]: Start difference. First operand 55408 states and 232869 transitions. Second operand has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:16,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:16,043 INFO L93 Difference]: Finished difference Result 82977 states and 348769 transitions. [2022-01-28 15:43:16,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:43:16,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:43:16,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:16,408 INFO L225 Difference]: With dead ends: 82977 [2022-01-28 15:43:16,408 INFO L226 Difference]: Without dead ends: 82922 [2022-01-28 15:43:16,409 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:43:16,409 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 241 mSDsluCounter, 925 mSDsCounter, 0 mSdLazyCounter, 533 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 533 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 370 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:16,409 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 684 Invalid, 915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 533 Invalid, 0 Unknown, 370 Unchecked, 0.2s Time] [2022-01-28 15:43:16,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82922 states. [2022-01-28 15:43:18,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82922 to 57629. [2022-01-28 15:43:18,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57629 states, 57628 states have (on average 4.20850975220379) internal successors, (242528), 57628 states have internal predecessors, (242528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:18,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57629 states to 57629 states and 242528 transitions. [2022-01-28 15:43:18,470 INFO L78 Accepts]: Start accepts. Automaton has 57629 states and 242528 transitions. Word has length 39 [2022-01-28 15:43:18,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:18,470 INFO L470 AbstractCegarLoop]: Abstraction has 57629 states and 242528 transitions. [2022-01-28 15:43:18,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.105263157894737) internal successors, (78), 18 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:18,470 INFO L276 IsEmpty]: Start isEmpty. Operand 57629 states and 242528 transitions. [2022-01-28 15:43:18,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:43:18,887 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:18,887 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:18,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:19,088 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,SelfDestructingSolverStorable57 [2022-01-28 15:43:19,088 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:43:19,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:19,088 INFO L85 PathProgramCache]: Analyzing trace with hash -2086619959, now seen corresponding path program 50 times [2022-01-28 15:43:19,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:19,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514950625] [2022-01-28 15:43:19,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:19,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:19,226 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:19,226 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514950625] [2022-01-28 15:43:19,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514950625] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:19,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027521610] [2022-01-28 15:43:19,227 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:43:19,227 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:19,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:19,228 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) [2022-01-28 15:43:19,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-28 15:43:19,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:43:19,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:19,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:43:19,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:19,577 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:43:19,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-01-28 15:43:19,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:19,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:19,632 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:19,632 INFO L388 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 34 treesize of output 14 [2022-01-28 15:43:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:19,666 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:19,840 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:19,841 INFO L388 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 60 treesize of output 78 [2022-01-28 15:43:20,032 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:20,032 INFO L388 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 47 treesize of output 61 [2022-01-28 15:43:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:20,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027521610] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:20,108 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:20,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-28 15:43:20,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290455447] [2022-01-28 15:43:20,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:20,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:43:20,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:20,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:43:20,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:43:20,109 INFO L87 Difference]: Start difference. First operand 57629 states and 242528 transitions. Second operand has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:21,157 INFO L93 Difference]: Finished difference Result 88877 states and 373417 transitions. [2022-01-28 15:43:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:43:21,157 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:43:21,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:21,754 INFO L225 Difference]: With dead ends: 88877 [2022-01-28 15:43:21,754 INFO L226 Difference]: Without dead ends: 88822 [2022-01-28 15:43:21,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:43:21,755 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 193 mSDsluCounter, 1005 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 759 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 343 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:21,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 759 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 641 Invalid, 0 Unknown, 343 Unchecked, 0.3s Time] [2022-01-28 15:43:21,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88822 states. [2022-01-28 15:43:23,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88822 to 58021. [2022-01-28 15:43:23,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58021 states, 58020 states have (on average 4.209617373319545) internal successors, (244242), 58020 states have internal predecessors, (244242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58021 states to 58021 states and 244242 transitions. [2022-01-28 15:43:23,914 INFO L78 Accepts]: Start accepts. Automaton has 58021 states and 244242 transitions. Word has length 39 [2022-01-28 15:43:23,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:23,915 INFO L470 AbstractCegarLoop]: Abstraction has 58021 states and 244242 transitions. [2022-01-28 15:43:23,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8421052631578947) internal successors, (73), 18 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 58021 states and 244242 transitions. [2022-01-28 15:43:24,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:43:24,085 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:24,085 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:24,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:24,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-01-28 15:43:24,287 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:43:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash -597267835, now seen corresponding path program 51 times [2022-01-28 15:43:24,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:24,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802684658] [2022-01-28 15:43:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:24,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:24,424 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:24,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:24,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802684658] [2022-01-28 15:43:24,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802684658] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:24,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746371561] [2022-01-28 15:43:24,425 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:43:24,425 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:24,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:24,426 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) [2022-01-28 15:43:24,426 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-28 15:43:24,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:43:24,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:24,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-28 15:43:24,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:24,759 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:43:24,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 58 [2022-01-28 15:43:24,815 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-28 15:43:24,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-01-28 15:43:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:24,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:25,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:25,756 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:43:25,757 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 59 [2022-01-28 15:43:25,909 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:25,910 INFO L388 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 48 treesize of output 62 [2022-01-28 15:43:26,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:26,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746371561] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:26,177 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:26,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-28 15:43:26,177 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348444411] [2022-01-28 15:43:26,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:26,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:43:26,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:26,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:43:26,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:43:26,178 INFO L87 Difference]: Start difference. First operand 58021 states and 244242 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:28,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:28,136 INFO L93 Difference]: Finished difference Result 114414 states and 480804 transitions. [2022-01-28 15:43:28,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 15:43:28,136 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:43:28,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:28,920 INFO L225 Difference]: With dead ends: 114414 [2022-01-28 15:43:28,920 INFO L226 Difference]: Without dead ends: 114304 [2022-01-28 15:43:28,921 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2022-01-28 15:43:28,921 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 538 mSDsluCounter, 2268 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 1701 SdHoareTripleChecker+Invalid, 2284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 973 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:28,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 1701 Invalid, 2284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1250 Invalid, 0 Unknown, 973 Unchecked, 0.5s Time] [2022-01-28 15:43:29,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114304 states. [2022-01-28 15:43:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114304 to 58390. [2022-01-28 15:43:30,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58390 states, 58389 states have (on average 4.210108068300536) internal successors, (245824), 58389 states have internal predecessors, (245824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:31,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58390 states to 58390 states and 245824 transitions. [2022-01-28 15:43:31,414 INFO L78 Accepts]: Start accepts. Automaton has 58390 states and 245824 transitions. Word has length 39 [2022-01-28 15:43:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:31,414 INFO L470 AbstractCegarLoop]: Abstraction has 58390 states and 245824 transitions. [2022-01-28 15:43:31,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 58390 states and 245824 transitions. [2022-01-28 15:43:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:43:31,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:31,568 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:31,585 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:31,768 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,SelfDestructingSolverStorable59 [2022-01-28 15:43:31,768 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:43:31,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:31,769 INFO L85 PathProgramCache]: Analyzing trace with hash -277661645, now seen corresponding path program 52 times [2022-01-28 15:43:31,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:31,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821632803] [2022-01-28 15:43:31,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:31,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:31,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:31,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:31,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821632803] [2022-01-28 15:43:31,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821632803] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:31,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69078017] [2022-01-28 15:43:31,936 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:43:31,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:31,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:31,937 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) [2022-01-28 15:43:31,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-28 15:43:31,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:43:31,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:31,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:43:31,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:32,229 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:43:32,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 27 [2022-01-28 15:43:32,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:32,328 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:32,328 INFO L388 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 34 treesize of output 14 [2022-01-28 15:43:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:32,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:32,792 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:32,793 INFO L388 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 60 treesize of output 78 [2022-01-28 15:43:32,962 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:32,963 INFO L388 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 47 treesize of output 61 [2022-01-28 15:43:33,030 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:33,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69078017] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:33,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:33,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2022-01-28 15:43:33,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144360923] [2022-01-28 15:43:33,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:33,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-28 15:43:33,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:33,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-28 15:43:33,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:43:33,031 INFO L87 Difference]: Start difference. First operand 58390 states and 245824 transitions. Second operand has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:34,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:34,143 INFO L93 Difference]: Finished difference Result 95743 states and 400649 transitions. [2022-01-28 15:43:34,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-28 15:43:34,143 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:43:34,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:34,564 INFO L225 Difference]: With dead ends: 95743 [2022-01-28 15:43:34,564 INFO L226 Difference]: Without dead ends: 95551 [2022-01-28 15:43:34,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2022-01-28 15:43:34,564 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 277 mSDsluCounter, 928 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 740 SdHoareTripleChecker+Invalid, 913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:34,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 740 Invalid, 913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 791 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2022-01-28 15:43:34,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95551 states. [2022-01-28 15:43:36,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95551 to 58626. [2022-01-28 15:43:36,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58626 states, 58625 states have (on average 4.207522388059702) internal successors, (246666), 58625 states have internal predecessors, (246666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:36,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58626 states to 58626 states and 246666 transitions. [2022-01-28 15:43:36,868 INFO L78 Accepts]: Start accepts. Automaton has 58626 states and 246666 transitions. Word has length 39 [2022-01-28 15:43:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:36,869 INFO L470 AbstractCegarLoop]: Abstraction has 58626 states and 246666 transitions. [2022-01-28 15:43:36,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.5714285714285716) internal successors, (75), 20 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 58626 states and 246666 transitions. [2022-01-28 15:43:37,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:43:37,373 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:37,373 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:37,389 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:37,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:37,574 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:43:37,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1064710707, now seen corresponding path program 53 times [2022-01-28 15:43:37,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:37,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651659620] [2022-01-28 15:43:37,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:37,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:37,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651659620] [2022-01-28 15:43:37,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651659620] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:37,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721891893] [2022-01-28 15:43:37,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:43:37,771 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:37,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:37,772 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) [2022-01-28 15:43:37,773 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-28 15:43:37,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:43:37,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:37,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 34 conjunts are in the unsatisfiable core [2022-01-28 15:43:37,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:38,080 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:43:38,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 48 [2022-01-28 15:43:38,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:38,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:38,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:38,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:43:38,216 INFO L388 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 27 treesize of output 43 [2022-01-28 15:43:38,296 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:38,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:39,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:39,028 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:39,029 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:39,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:39,030 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 39 [2022-01-28 15:43:39,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:39,447 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:43:39,447 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 39 [2022-01-28 15:43:39,486 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:39,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721891893] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:39,486 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:39,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 29 [2022-01-28 15:43:39,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675169531] [2022-01-28 15:43:39,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:39,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-28 15:43:39,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:39,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-28 15:43:39,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=742, Unknown=0, NotChecked=0, Total=870 [2022-01-28 15:43:39,487 INFO L87 Difference]: Start difference. First operand 58626 states and 246666 transitions. Second operand has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:42,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:42,386 INFO L93 Difference]: Finished difference Result 118301 states and 496618 transitions. [2022-01-28 15:43:42,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-28 15:43:42,386 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:43:42,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:43,194 INFO L225 Difference]: With dead ends: 118301 [2022-01-28 15:43:43,194 INFO L226 Difference]: Without dead ends: 118271 [2022-01-28 15:43:43,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=624, Invalid=3798, Unknown=0, NotChecked=0, Total=4422 [2022-01-28 15:43:43,195 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 801 mSDsluCounter, 2678 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 801 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 2270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1544 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:43,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [801 Valid, 2349 Invalid, 2270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 636 Invalid, 0 Unknown, 1544 Unchecked, 0.3s Time] [2022-01-28 15:43:43,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118271 states. [2022-01-28 15:43:45,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118271 to 60182. [2022-01-28 15:43:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60182 states, 60181 states have (on average 4.198866751964906) internal successors, (252692), 60181 states have internal predecessors, (252692), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:45,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60182 states to 60182 states and 252692 transitions. [2022-01-28 15:43:45,712 INFO L78 Accepts]: Start accepts. Automaton has 60182 states and 252692 transitions. Word has length 39 [2022-01-28 15:43:45,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:45,712 INFO L470 AbstractCegarLoop]: Abstraction has 60182 states and 252692 transitions. [2022-01-28 15:43:45,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.2666666666666666) internal successors, (98), 29 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:45,712 INFO L276 IsEmpty]: Start isEmpty. Operand 60182 states and 252692 transitions. [2022-01-28 15:43:45,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:43:45,855 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:45,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:45,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:46,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:46,058 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:43:46,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:46,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1796936005, now seen corresponding path program 54 times [2022-01-28 15:43:46,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:46,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737836614] [2022-01-28 15:43:46,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:46,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:46,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:46,207 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:46,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:46,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737836614] [2022-01-28 15:43:46,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737836614] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:46,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832980815] [2022-01-28 15:43:46,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:43:46,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:46,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:46,209 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) [2022-01-28 15:43:46,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-28 15:43:46,237 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 15:43:46,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:46,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-28 15:43:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:46,824 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:43:46,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 35 [2022-01-28 15:43:46,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:46,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:46,923 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:46,923 INFO L388 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 44 treesize of output 14 [2022-01-28 15:43:46,944 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:46,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:47,127 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:47,127 INFO L388 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 60 treesize of output 78 [2022-01-28 15:43:47,294 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:47,294 INFO L388 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 47 treesize of output 61 [2022-01-28 15:43:47,363 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:47,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832980815] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:47,363 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:47,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-28 15:43:47,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203082052] [2022-01-28 15:43:47,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:47,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:43:47,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:47,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:43:47,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:43:47,364 INFO L87 Difference]: Start difference. First operand 60182 states and 252692 transitions. Second operand has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:48,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:48,403 INFO L93 Difference]: Finished difference Result 90771 states and 379629 transitions. [2022-01-28 15:43:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:43:48,403 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:43:48,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:48,793 INFO L225 Difference]: With dead ends: 90771 [2022-01-28 15:43:48,793 INFO L226 Difference]: Without dead ends: 90475 [2022-01-28 15:43:48,793 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:43:48,793 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 233 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 815 SdHoareTripleChecker+Invalid, 1093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:48,793 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 815 Invalid, 1093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 771 Invalid, 0 Unknown, 305 Unchecked, 0.3s Time] [2022-01-28 15:43:49,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90475 states. [2022-01-28 15:43:50,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90475 to 59642. [2022-01-28 15:43:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59642 states, 59641 states have (on average 4.203132073573548) internal successors, (250679), 59641 states have internal predecessors, (250679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:50,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59642 states to 59642 states and 250679 transitions. [2022-01-28 15:43:50,885 INFO L78 Accepts]: Start accepts. Automaton has 59642 states and 250679 transitions. Word has length 39 [2022-01-28 15:43:50,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:50,885 INFO L470 AbstractCegarLoop]: Abstraction has 59642 states and 250679 transitions. [2022-01-28 15:43:50,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.85) internal successors, (77), 19 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:50,885 INFO L276 IsEmpty]: Start isEmpty. Operand 59642 states and 250679 transitions. [2022-01-28 15:43:51,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:43:51,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:51,340 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:51,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:51,547 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:51,547 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:43:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:51,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1752340425, now seen corresponding path program 55 times [2022-01-28 15:43:51,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:51,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534190702] [2022-01-28 15:43:51,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:51,548 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:51,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:51,708 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:51,708 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:51,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534190702] [2022-01-28 15:43:51,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534190702] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:51,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806165949] [2022-01-28 15:43:51,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:43:51,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:51,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:51,709 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) [2022-01-28 15:43:51,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-28 15:43:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:51,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:43:51,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:52,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:52,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:52,080 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:52,081 INFO L388 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 55 treesize of output 35 [2022-01-28 15:43:52,102 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:43:52,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-01-28 15:43:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:52,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:52,323 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:52,323 INFO L388 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 60 treesize of output 78 [2022-01-28 15:43:52,508 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:52,509 INFO L388 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 47 treesize of output 61 [2022-01-28 15:43:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:52,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806165949] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:52,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:52,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2022-01-28 15:43:52,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181206742] [2022-01-28 15:43:52,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:52,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-28 15:43:52,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:52,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-28 15:43:52,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:43:52,574 INFO L87 Difference]: Start difference. First operand 59642 states and 250679 transitions. Second operand has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:53,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:53,904 INFO L93 Difference]: Finished difference Result 91685 states and 383182 transitions. [2022-01-28 15:43:53,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-28 15:43:53,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:43:53,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:54,502 INFO L225 Difference]: With dead ends: 91685 [2022-01-28 15:43:54,503 INFO L226 Difference]: Without dead ends: 91595 [2022-01-28 15:43:54,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 61 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:43:54,503 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 276 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 131 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:54,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 802 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 910 Invalid, 0 Unknown, 131 Unchecked, 0.4s Time] [2022-01-28 15:43:54,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91595 states. [2022-01-28 15:43:56,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91595 to 59636. [2022-01-28 15:43:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59636 states, 59635 states have (on average 4.20499706548168) internal successors, (250765), 59635 states have internal predecessors, (250765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59636 states to 59636 states and 250765 transitions. [2022-01-28 15:43:56,691 INFO L78 Accepts]: Start accepts. Automaton has 59636 states and 250765 transitions. Word has length 39 [2022-01-28 15:43:56,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:43:56,692 INFO L470 AbstractCegarLoop]: Abstraction has 59636 states and 250765 transitions. [2022-01-28 15:43:56,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.5) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:56,692 INFO L276 IsEmpty]: Start isEmpty. Operand 59636 states and 250765 transitions. [2022-01-28 15:43:56,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:43:56,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:43:56,848 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:43:56,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-01-28 15:43:57,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:57,048 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:43:57,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:43:57,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1883093389, now seen corresponding path program 56 times [2022-01-28 15:43:57,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:43:57,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798302794] [2022-01-28 15:43:57,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:43:57,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:43:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:43:57,198 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:57,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:43:57,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798302794] [2022-01-28 15:43:57,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798302794] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:43:57,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508932352] [2022-01-28 15:43:57,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:43:57,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:43:57,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:43:57,200 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) [2022-01-28 15:43:57,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-28 15:43:57,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:43:57,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:43:57,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:43:57,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:43:57,640 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:43:57,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 42 [2022-01-28 15:43:57,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:57,689 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:43:57,690 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:43:57,690 INFO L388 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 34 treesize of output 14 [2022-01-28 15:43:57,724 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:57,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:43:57,892 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:57,892 INFO L388 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 60 treesize of output 78 [2022-01-28 15:43:58,062 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:43:58,062 INFO L388 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 47 treesize of output 61 [2022-01-28 15:43:58,115 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:43:58,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508932352] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:43:58,115 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:43:58,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-28 15:43:58,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474547658] [2022-01-28 15:43:58,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:43:58,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:43:58,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:43:58,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:43:58,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:43:58,116 INFO L87 Difference]: Start difference. First operand 59636 states and 250765 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:43:59,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:43:59,147 INFO L93 Difference]: Finished difference Result 86360 states and 361808 transitions. [2022-01-28 15:43:59,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:43:59,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:43:59,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:43:59,723 INFO L225 Difference]: With dead ends: 86360 [2022-01-28 15:43:59,723 INFO L226 Difference]: Without dead ends: 86270 [2022-01-28 15:43:59,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:43:59,723 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 198 mSDsluCounter, 1162 mSDsCounter, 0 mSdLazyCounter, 716 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 1091 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 363 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:43:59,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 909 Invalid, 1091 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 716 Invalid, 0 Unknown, 363 Unchecked, 0.3s Time] [2022-01-28 15:43:59,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86270 states. [2022-01-28 15:44:01,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86270 to 60084. [2022-01-28 15:44:01,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60084 states, 60083 states have (on average 4.2040344190536425) internal successors, (252591), 60083 states have internal predecessors, (252591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:01,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60084 states to 60084 states and 252591 transitions. [2022-01-28 15:44:01,929 INFO L78 Accepts]: Start accepts. Automaton has 60084 states and 252591 transitions. Word has length 39 [2022-01-28 15:44:01,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:01,929 INFO L470 AbstractCegarLoop]: Abstraction has 60084 states and 252591 transitions. [2022-01-28 15:44:01,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 18 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:01,929 INFO L276 IsEmpty]: Start isEmpty. Operand 60084 states and 252591 transitions. [2022-01-28 15:44:02,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:44:02,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:02,083 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:02,099 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-28 15:44:02,283 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,SelfDestructingSolverStorable64 [2022-01-28 15:44:02,284 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:44:02,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:02,284 INFO L85 PathProgramCache]: Analyzing trace with hash 449772805, now seen corresponding path program 57 times [2022-01-28 15:44:02,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:02,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862884735] [2022-01-28 15:44:02,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:02,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:02,425 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:02,425 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:02,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862884735] [2022-01-28 15:44:02,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862884735] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:02,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870602733] [2022-01-28 15:44:02,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:44:02,426 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:02,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:02,427 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) [2022-01-28 15:44:02,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-28 15:44:02,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:44:02,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:02,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 37 conjunts are in the unsatisfiable core [2022-01-28 15:44:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:02,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:02,872 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:02,872 INFO L388 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 60 treesize of output 60 [2022-01-28 15:44:03,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:03,006 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:03,006 INFO L388 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 42 [2022-01-28 15:44:03,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:03,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:04,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:04,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:04,562 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:04,562 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2022-01-28 15:44:05,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:05,055 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:05,056 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:05,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:05,063 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 56 [2022-01-28 15:44:05,168 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:05,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870602733] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:05,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:05,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-28 15:44:05,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929369008] [2022-01-28 15:44:05,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:05,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:44:05,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:05,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:44:05,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:44:05,169 INFO L87 Difference]: Start difference. First operand 60084 states and 252591 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:06,274 INFO L93 Difference]: Finished difference Result 75629 states and 314428 transitions. [2022-01-28 15:44:06,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-28 15:44:06,274 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:44:06,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:06,745 INFO L225 Difference]: With dead ends: 75629 [2022-01-28 15:44:06,746 INFO L226 Difference]: Without dead ends: 75500 [2022-01-28 15:44:06,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=177, Invalid=1305, Unknown=0, NotChecked=0, Total=1482 [2022-01-28 15:44:06,746 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 386 mSDsluCounter, 2154 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 1269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 660 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:06,746 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 1743 Invalid, 1269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 597 Invalid, 0 Unknown, 660 Unchecked, 0.3s Time] [2022-01-28 15:44:06,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75500 states. [2022-01-28 15:44:08,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75500 to 61933. [2022-01-28 15:44:08,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61933 states, 61932 states have (on average 4.197846024672221) internal successors, (259981), 61932 states have internal predecessors, (259981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:08,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61933 states to 61933 states and 259981 transitions. [2022-01-28 15:44:08,550 INFO L78 Accepts]: Start accepts. Automaton has 61933 states and 259981 transitions. Word has length 39 [2022-01-28 15:44:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:08,550 INFO L470 AbstractCegarLoop]: Abstraction has 61933 states and 259981 transitions. [2022-01-28 15:44:08,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 61933 states and 259981 transitions. [2022-01-28 15:44:08,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:44:08,985 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:08,985 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:09,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-28 15:44:09,186 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,SelfDestructingSolverStorable65 [2022-01-28 15:44:09,186 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:44:09,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:09,186 INFO L85 PathProgramCache]: Analyzing trace with hash -428321307, now seen corresponding path program 58 times [2022-01-28 15:44:09,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:09,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955504041] [2022-01-28 15:44:09,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:09,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:09,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:09,338 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:09,338 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:09,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955504041] [2022-01-28 15:44:09,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955504041] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:09,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431018168] [2022-01-28 15:44:09,338 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:44:09,338 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:09,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:09,339 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) [2022-01-28 15:44:09,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-28 15:44:09,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:44:09,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:44:09,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:09,779 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:44:09,780 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 42 [2022-01-28 15:44:09,838 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:09,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:09,839 INFO L388 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 50 treesize of output 14 [2022-01-28 15:44:09,860 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:09,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:10,031 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:44:10,032 INFO L388 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 60 treesize of output 78 [2022-01-28 15:44:10,199 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:44:10,200 INFO L388 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 47 treesize of output 61 [2022-01-28 15:44:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:10,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431018168] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:10,273 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:10,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-28 15:44:10,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255284766] [2022-01-28 15:44:10,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:10,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:44:10,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:10,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:44:10,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:44:10,274 INFO L87 Difference]: Start difference. First operand 61933 states and 259981 transitions. Second operand has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:11,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:11,350 INFO L93 Difference]: Finished difference Result 89444 states and 374356 transitions. [2022-01-28 15:44:11,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:44:11,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:44:11,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:12,167 INFO L225 Difference]: With dead ends: 89444 [2022-01-28 15:44:12,167 INFO L226 Difference]: Without dead ends: 89324 [2022-01-28 15:44:12,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:44:12,176 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 191 mSDsluCounter, 1080 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 221 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:12,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 860 Invalid, 962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 728 Invalid, 0 Unknown, 221 Unchecked, 0.3s Time] [2022-01-28 15:44:12,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89324 states. [2022-01-28 15:44:13,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89324 to 61256. [2022-01-28 15:44:14,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61256 states, 61255 states have (on average 4.19838380540364) internal successors, (257172), 61255 states have internal predecessors, (257172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:14,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61256 states to 61256 states and 257172 transitions. [2022-01-28 15:44:14,613 INFO L78 Accepts]: Start accepts. Automaton has 61256 states and 257172 transitions. Word has length 39 [2022-01-28 15:44:14,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:14,613 INFO L470 AbstractCegarLoop]: Abstraction has 61256 states and 257172 transitions. [2022-01-28 15:44:14,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.9473684210526314) internal successors, (75), 18 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:14,613 INFO L276 IsEmpty]: Start isEmpty. Operand 61256 states and 257172 transitions. [2022-01-28 15:44:14,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:44:14,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:14,788 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:14,803 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-01-28 15:44:14,988 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,SelfDestructingSolverStorable66 [2022-01-28 15:44:14,988 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:44:14,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:14,989 INFO L85 PathProgramCache]: Analyzing trace with hash 116528589, now seen corresponding path program 59 times [2022-01-28 15:44:14,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:14,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972651457] [2022-01-28 15:44:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:14,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:15,147 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972651457] [2022-01-28 15:44:15,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972651457] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:15,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286244889] [2022-01-28 15:44:15,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:44:15,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:15,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:15,148 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) [2022-01-28 15:44:15,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-28 15:44:15,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-01-28 15:44:15,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:15,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-28 15:44:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:15,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:15,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:15,461 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:15,461 INFO L388 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 49 treesize of output 61 [2022-01-28 15:44:15,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:15,600 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:15,601 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:15,610 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:15,611 INFO L388 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 61 treesize of output 65 [2022-01-28 15:44:15,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:15,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:16,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:16,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:16,707 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:16,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:16,708 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 43 [2022-01-28 15:44:16,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:16,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:16,966 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:16,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:16,967 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 17 [2022-01-28 15:44:16,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:16,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286244889] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:16,978 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:16,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 28 [2022-01-28 15:44:16,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491772117] [2022-01-28 15:44:16,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:16,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:44:16,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:16,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:44:16,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=694, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:44:16,979 INFO L87 Difference]: Start difference. First operand 61256 states and 257172 transitions. Second operand has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:23,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:23,469 INFO L93 Difference]: Finished difference Result 193045 states and 806252 transitions. [2022-01-28 15:44:23,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-28 15:44:23,469 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:44:23,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:24,737 INFO L225 Difference]: With dead ends: 193045 [2022-01-28 15:44:24,737 INFO L226 Difference]: Without dead ends: 192865 [2022-01-28 15:44:24,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 86 SyntacticMatches, 9 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2998 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1418, Invalid=8884, Unknown=0, NotChecked=0, Total=10302 [2022-01-28 15:44:24,741 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 1278 mSDsluCounter, 3805 mSDsCounter, 0 mSdLazyCounter, 1841 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1278 SdHoareTripleChecker+Valid, 3109 SdHoareTripleChecker+Invalid, 4212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2211 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:24,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1278 Valid, 3109 Invalid, 4212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 1841 Invalid, 0 Unknown, 2211 Unchecked, 1.1s Time] [2022-01-28 15:44:24,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192865 states. [2022-01-28 15:44:28,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192865 to 67078. [2022-01-28 15:44:28,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67078 states, 67077 states have (on average 4.182551396156656) internal successors, (280553), 67077 states have internal predecessors, (280553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67078 states to 67078 states and 280553 transitions. [2022-01-28 15:44:28,761 INFO L78 Accepts]: Start accepts. Automaton has 67078 states and 280553 transitions. Word has length 39 [2022-01-28 15:44:28,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:28,761 INFO L470 AbstractCegarLoop]: Abstraction has 67078 states and 280553 transitions. [2022-01-28 15:44:28,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.3793103448275863) internal successors, (98), 28 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:28,761 INFO L276 IsEmpty]: Start isEmpty. Operand 67078 states and 280553 transitions. [2022-01-28 15:44:28,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:44:28,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:28,941 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:28,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-01-28 15:44:29,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:29,142 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:44:29,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:29,142 INFO L85 PathProgramCache]: Analyzing trace with hash 328297329, now seen corresponding path program 60 times [2022-01-28 15:44:29,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:29,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067764241] [2022-01-28 15:44:29,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:29,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:29,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:29,294 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:29,294 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067764241] [2022-01-28 15:44:29,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067764241] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:29,294 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908663566] [2022-01-28 15:44:29,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:44:29,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:29,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:29,295 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) [2022-01-28 15:44:29,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-28 15:44:29,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-01-28 15:44:29,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:29,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-28 15:44:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:29,648 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:44:29,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 30 [2022-01-28 15:44:29,738 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:44:29,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2022-01-28 15:44:29,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:29,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:30,297 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:44:30,297 INFO L388 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 57 treesize of output 75 [2022-01-28 15:44:31,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:31,052 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:44:31,053 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 36 [2022-01-28 15:44:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:31,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908663566] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:31,085 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:31,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2022-01-28 15:44:31,086 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375735066] [2022-01-28 15:44:31,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:31,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-28 15:44:31,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-28 15:44:31,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2022-01-28 15:44:31,086 INFO L87 Difference]: Start difference. First operand 67078 states and 280553 transitions. Second operand has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:32,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:32,977 INFO L93 Difference]: Finished difference Result 113129 states and 470776 transitions. [2022-01-28 15:44:32,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-28 15:44:32,978 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:44:32,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:33,699 INFO L225 Difference]: With dead ends: 113129 [2022-01-28 15:44:33,699 INFO L226 Difference]: Without dead ends: 113031 [2022-01-28 15:44:33,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=265, Invalid=1805, Unknown=0, NotChecked=0, Total=2070 [2022-01-28 15:44:33,700 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 486 mSDsluCounter, 1681 mSDsCounter, 0 mSdLazyCounter, 913 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 913 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 844 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:33,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 1269 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 913 Invalid, 0 Unknown, 844 Unchecked, 0.4s Time] [2022-01-28 15:44:33,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113031 states. [2022-01-28 15:44:35,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113031 to 66949. [2022-01-28 15:44:35,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66949 states, 66948 states have (on average 4.192388122124634) internal successors, (280672), 66948 states have internal predecessors, (280672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66949 states to 66949 states and 280672 transitions. [2022-01-28 15:44:36,176 INFO L78 Accepts]: Start accepts. Automaton has 66949 states and 280672 transitions. Word has length 39 [2022-01-28 15:44:36,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:36,179 INFO L470 AbstractCegarLoop]: Abstraction has 66949 states and 280672 transitions. [2022-01-28 15:44:36,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.740740740740741) internal successors, (101), 26 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:36,179 INFO L276 IsEmpty]: Start isEmpty. Operand 66949 states and 280672 transitions. [2022-01-28 15:44:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:44:36,353 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:36,353 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:36,368 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2022-01-28 15:44:36,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:36,553 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:44:36,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:36,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1585244493, now seen corresponding path program 61 times [2022-01-28 15:44:36,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:36,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760573750] [2022-01-28 15:44:36,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:36,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:36,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:36,707 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:36,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:36,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760573750] [2022-01-28 15:44:36,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760573750] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:36,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814327980] [2022-01-28 15:44:36,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:44:36,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:36,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:36,709 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) [2022-01-28 15:44:36,710 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-28 15:44:37,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:44:37,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:37,487 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:44:37,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 68 treesize of output 42 [2022-01-28 15:44:37,534 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:37,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:37,535 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:37,535 INFO L388 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 34 treesize of output 14 [2022-01-28 15:44:37,558 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:37,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:37,726 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:44:37,726 INFO L388 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 60 treesize of output 78 [2022-01-28 15:44:37,885 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:44:37,885 INFO L388 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 47 treesize of output 61 [2022-01-28 15:44:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:37,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814327980] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:37,955 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:37,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-01-28 15:44:37,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184684854] [2022-01-28 15:44:37,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:37,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-28 15:44:37,956 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:37,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-28 15:44:37,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:44:37,956 INFO L87 Difference]: Start difference. First operand 66949 states and 280672 transitions. Second operand has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:38,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:38,993 INFO L93 Difference]: Finished difference Result 97929 states and 409176 transitions. [2022-01-28 15:44:38,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:44:38,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:44:38,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:39,613 INFO L225 Difference]: With dead ends: 97929 [2022-01-28 15:44:39,614 INFO L226 Difference]: Without dead ends: 97611 [2022-01-28 15:44:39,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-01-28 15:44:39,614 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 225 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 646 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 855 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 196 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:39,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 651 Invalid, 855 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 646 Invalid, 0 Unknown, 196 Unchecked, 0.3s Time] [2022-01-28 15:44:39,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97611 states. [2022-01-28 15:44:41,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97611 to 65045. [2022-01-28 15:44:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65045 states, 65044 states have (on average 4.196190271201033) internal successors, (272937), 65044 states have internal predecessors, (272937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65045 states to 65045 states and 272937 transitions. [2022-01-28 15:44:41,879 INFO L78 Accepts]: Start accepts. Automaton has 65045 states and 272937 transitions. Word has length 39 [2022-01-28 15:44:41,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:41,879 INFO L470 AbstractCegarLoop]: Abstraction has 65045 states and 272937 transitions. [2022-01-28 15:44:41,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.8947368421052633) internal successors, (74), 18 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:41,879 INFO L276 IsEmpty]: Start isEmpty. Operand 65045 states and 272937 transitions. [2022-01-28 15:44:42,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:44:42,053 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:42,053 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:42,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2022-01-28 15:44:42,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-01-28 15:44:42,254 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:44:42,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:42,254 INFO L85 PathProgramCache]: Analyzing trace with hash -1778485043, now seen corresponding path program 62 times [2022-01-28 15:44:42,254 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:42,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351957325] [2022-01-28 15:44:42,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:42,255 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:42,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:42,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:42,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351957325] [2022-01-28 15:44:42,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351957325] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:42,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72648996] [2022-01-28 15:44:42,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:44:42,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:42,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:42,404 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) [2022-01-28 15:44:42,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-28 15:44:42,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:44:42,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:42,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:44:42,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:42,729 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:44:42,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 25 [2022-01-28 15:44:42,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:42,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:42,813 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:42,813 INFO L388 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 34 treesize of output 14 [2022-01-28 15:44:42,848 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:42,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:42,997 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:44:42,998 INFO L388 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 60 treesize of output 78 [2022-01-28 15:44:43,189 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:44:43,189 INFO L388 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 47 treesize of output 61 [2022-01-28 15:44:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:43,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72648996] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:43,285 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:43,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-28 15:44:43,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894310789] [2022-01-28 15:44:43,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:43,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:44:43,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:43,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:44:43,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:44:43,286 INFO L87 Difference]: Start difference. First operand 65045 states and 272937 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:44,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:44,269 INFO L93 Difference]: Finished difference Result 83851 states and 352121 transitions. [2022-01-28 15:44:44,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-28 15:44:44,270 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:44:44,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:44,817 INFO L225 Difference]: With dead ends: 83851 [2022-01-28 15:44:44,818 INFO L226 Difference]: Without dead ends: 83796 [2022-01-28 15:44:44,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:44:44,818 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 149 mSDsluCounter, 892 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 278 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:44,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 741 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 483 Invalid, 0 Unknown, 278 Unchecked, 0.5s Time] [2022-01-28 15:44:44,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83796 states. [2022-01-28 15:44:46,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83796 to 65729. [2022-01-28 15:44:46,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65729 states, 65728 states have (on average 4.195380963972736) internal successors, (275754), 65728 states have internal predecessors, (275754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:47,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65729 states to 65729 states and 275754 transitions. [2022-01-28 15:44:47,028 INFO L78 Accepts]: Start accepts. Automaton has 65729 states and 275754 transitions. Word has length 39 [2022-01-28 15:44:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:47,028 INFO L470 AbstractCegarLoop]: Abstraction has 65729 states and 275754 transitions. [2022-01-28 15:44:47,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 65729 states and 275754 transitions. [2022-01-28 15:44:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:44:47,213 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:47,213 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:47,231 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2022-01-28 15:44:47,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:47,414 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:44:47,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:47,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1083161669, now seen corresponding path program 63 times [2022-01-28 15:44:47,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:47,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673648875] [2022-01-28 15:44:47,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:47,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:47,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:47,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:47,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673648875] [2022-01-28 15:44:47,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673648875] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:47,556 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442921776] [2022-01-28 15:44:47,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:44:47,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:47,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:47,557 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) [2022-01-28 15:44:47,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-28 15:44:47,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-28 15:44:47,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:47,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:44:47,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:47,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:47,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:47,973 INFO L388 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 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 43 [2022-01-28 15:44:48,139 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:44:48,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 32 [2022-01-28 15:44:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:48,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:50,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:50,500 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:44:50,501 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 55 [2022-01-28 15:44:50,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:50,948 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:50,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:50,955 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-28 15:44:50,955 INFO L388 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 44 [2022-01-28 15:44:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:51,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442921776] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:51,017 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:51,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-28 15:44:51,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499616377] [2022-01-28 15:44:51,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:51,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-28 15:44:51,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-28 15:44:51,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=708, Unknown=0, NotChecked=0, Total=812 [2022-01-28 15:44:51,018 INFO L87 Difference]: Start difference. First operand 65729 states and 275754 transitions. Second operand has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:53,292 INFO L93 Difference]: Finished difference Result 97220 states and 405787 transitions. [2022-01-28 15:44:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-28 15:44:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:44:53,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:53,718 INFO L225 Difference]: With dead ends: 97220 [2022-01-28 15:44:53,718 INFO L226 Difference]: Without dead ends: 97165 [2022-01-28 15:44:53,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 58 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=310, Invalid=2342, Unknown=0, NotChecked=0, Total=2652 [2022-01-28 15:44:53,719 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 619 mSDsluCounter, 2308 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 619 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 2418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1498 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:53,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [619 Valid, 1448 Invalid, 2418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 870 Invalid, 0 Unknown, 1498 Unchecked, 0.4s Time] [2022-01-28 15:44:53,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97165 states. [2022-01-28 15:44:55,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97165 to 71793. [2022-01-28 15:44:55,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71793 states, 71792 states have (on average 4.199270113661689) internal successors, (301474), 71792 states have internal predecessors, (301474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71793 states to 71793 states and 301474 transitions. [2022-01-28 15:44:56,713 INFO L78 Accepts]: Start accepts. Automaton has 71793 states and 301474 transitions. Word has length 39 [2022-01-28 15:44:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:44:56,713 INFO L470 AbstractCegarLoop]: Abstraction has 71793 states and 301474 transitions. [2022-01-28 15:44:56,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.5517241379310347) internal successors, (103), 28 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 71793 states and 301474 transitions. [2022-01-28 15:44:56,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:44:56,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:44:56,965 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:44:56,981 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-01-28 15:44:57,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:57,179 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:44:57,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:44:57,180 INFO L85 PathProgramCache]: Analyzing trace with hash -421743671, now seen corresponding path program 64 times [2022-01-28 15:44:57,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:44:57,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340995817] [2022-01-28 15:44:57,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:44:57,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:44:57,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:44:57,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:57,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:44:57,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340995817] [2022-01-28 15:44:57,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340995817] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:44:57,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941689753] [2022-01-28 15:44:57,349 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:44:57,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:44:57,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:44:57,350 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) [2022-01-28 15:44:57,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-28 15:44:57,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:44:57,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:44:57,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:44:57,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:44:57,813 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:44:57,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-01-28 15:44:57,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:57,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:44:57,874 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:44:57,875 INFO L388 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 34 treesize of output 14 [2022-01-28 15:44:57,925 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:57,925 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:44:58,090 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:44:58,090 INFO L388 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 60 treesize of output 78 [2022-01-28 15:44:58,254 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:44:58,255 INFO L388 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 47 treesize of output 61 [2022-01-28 15:44:58,321 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:44:58,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941689753] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:44:58,321 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:44:58,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-28 15:44:58,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421241813] [2022-01-28 15:44:58,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:44:58,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:44:58,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:44:58,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:44:58,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:44:58,322 INFO L87 Difference]: Start difference. First operand 71793 states and 301474 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:44:59,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:44:59,161 INFO L93 Difference]: Finished difference Result 82980 states and 348586 transitions. [2022-01-28 15:44:59,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:44:59,161 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:44:59,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:44:59,763 INFO L225 Difference]: With dead ends: 82980 [2022-01-28 15:44:59,763 INFO L226 Difference]: Without dead ends: 82961 [2022-01-28 15:44:59,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:44:59,763 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 153 mSDsluCounter, 807 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:44:59,763 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 687 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 347 Invalid, 0 Unknown, 305 Unchecked, 0.1s Time] [2022-01-28 15:44:59,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82961 states. [2022-01-28 15:45:01,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82961 to 72453. [2022-01-28 15:45:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72453 states, 72452 states have (on average 4.2020648153260085) internal successors, (304448), 72452 states have internal predecessors, (304448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:02,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72453 states to 72453 states and 304448 transitions. [2022-01-28 15:45:02,111 INFO L78 Accepts]: Start accepts. Automaton has 72453 states and 304448 transitions. Word has length 39 [2022-01-28 15:45:02,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:02,111 INFO L470 AbstractCegarLoop]: Abstraction has 72453 states and 304448 transitions. [2022-01-28 15:45:02,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:02,111 INFO L276 IsEmpty]: Start isEmpty. Operand 72453 states and 304448 transitions. [2022-01-28 15:45:02,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:45:02,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:02,304 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:02,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-28 15:45:02,511 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,SelfDestructingSolverStorable72 [2022-01-28 15:45:02,511 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:45:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1855064255, now seen corresponding path program 65 times [2022-01-28 15:45:02,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:02,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228949937] [2022-01-28 15:45:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:02,512 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:02,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:02,643 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:02,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:02,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228949937] [2022-01-28 15:45:02,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228949937] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:02,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399929853] [2022-01-28 15:45:02,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:45:02,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:02,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:02,645 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) [2022-01-28 15:45:02,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-28 15:45:02,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:45:02,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:02,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 32 conjunts are in the unsatisfiable core [2022-01-28 15:45:02,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:03,354 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:45:03,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 49 [2022-01-28 15:45:03,709 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:03,709 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:03,710 INFO L388 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 26 treesize of output 14 [2022-01-28 15:45:03,731 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:03,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:04,787 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:04,789 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:04,807 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-01-28 15:45:04,807 INFO L388 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 51 treesize of output 63 [2022-01-28 15:45:05,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:05,508 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:45:05,509 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 42 treesize of output 36 [2022-01-28 15:45:05,568 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:05,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399929853] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:05,568 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:05,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 27 [2022-01-28 15:45:05,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875236361] [2022-01-28 15:45:05,568 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:05,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-28 15:45:05,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:05,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-28 15:45:05,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2022-01-28 15:45:05,569 INFO L87 Difference]: Start difference. First operand 72453 states and 304448 transitions. Second operand has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:07,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:07,260 INFO L93 Difference]: Finished difference Result 93374 states and 389224 transitions. [2022-01-28 15:45:07,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-28 15:45:07,261 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:45:07,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:07,675 INFO L225 Difference]: With dead ends: 93374 [2022-01-28 15:45:07,675 INFO L226 Difference]: Without dead ends: 93371 [2022-01-28 15:45:07,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 68 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=454, Invalid=1996, Unknown=0, NotChecked=0, Total=2450 [2022-01-28 15:45:07,675 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 420 mSDsluCounter, 1372 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 699 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:07,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 1154 Invalid, 985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 275 Invalid, 0 Unknown, 699 Unchecked, 0.1s Time] [2022-01-28 15:45:07,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93371 states. [2022-01-28 15:45:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93371 to 74090. [2022-01-28 15:45:09,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74090 states, 74089 states have (on average 4.19781614004778) internal successors, (311012), 74089 states have internal predecessors, (311012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:10,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74090 states to 74090 states and 311012 transitions. [2022-01-28 15:45:10,426 INFO L78 Accepts]: Start accepts. Automaton has 74090 states and 311012 transitions. Word has length 39 [2022-01-28 15:45:10,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:10,426 INFO L470 AbstractCegarLoop]: Abstraction has 74090 states and 311012 transitions. [2022-01-28 15:45:10,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.7142857142857144) internal successors, (104), 27 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:10,426 INFO L276 IsEmpty]: Start isEmpty. Operand 74090 states and 311012 transitions. [2022-01-28 15:45:10,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:45:10,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:10,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:10,648 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-28 15:45:10,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:10,835 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:45:10,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:10,836 INFO L85 PathProgramCache]: Analyzing trace with hash 723343273, now seen corresponding path program 66 times [2022-01-28 15:45:10,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:10,836 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462232951] [2022-01-28 15:45:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:10,836 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:10,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:10,978 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:10,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462232951] [2022-01-28 15:45:10,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462232951] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:10,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304318189] [2022-01-28 15:45:10,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:45:10,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:10,978 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:10,979 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) [2022-01-28 15:45:10,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-01-28 15:45:11,007 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:45:11,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:11,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 31 conjunts are in the unsatisfiable core [2022-01-28 15:45:11,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:11,373 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:45:11,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-01-28 15:45:11,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:11,461 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:11,462 INFO L388 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 32 treesize of output 14 [2022-01-28 15:45:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:11,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:11,636 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:45:11,636 INFO L388 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 60 treesize of output 78 [2022-01-28 15:45:12,039 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:45:12,039 INFO L388 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 47 treesize of output 61 [2022-01-28 15:45:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:12,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304318189] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:12,101 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:12,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-28 15:45:12,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492236605] [2022-01-28 15:45:12,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:12,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:45:12,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:12,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:45:12,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:45:12,102 INFO L87 Difference]: Start difference. First operand 74090 states and 311012 transitions. Second operand has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:13,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:13,134 INFO L93 Difference]: Finished difference Result 100953 states and 423720 transitions. [2022-01-28 15:45:13,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:45:13,135 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:45:13,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:13,626 INFO L225 Difference]: With dead ends: 100953 [2022-01-28 15:45:13,626 INFO L226 Difference]: Without dead ends: 100946 [2022-01-28 15:45:13,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:45:13,627 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 153 mSDsluCounter, 893 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 722 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 393 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:13,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 722 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 498 Invalid, 0 Unknown, 393 Unchecked, 0.2s Time] [2022-01-28 15:45:13,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100946 states. [2022-01-28 15:45:15,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100946 to 74509. [2022-01-28 15:45:15,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74509 states, 74508 states have (on average 4.19942824931551) internal successors, (312891), 74508 states have internal predecessors, (312891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74509 states to 74509 states and 312891 transitions. [2022-01-28 15:45:16,375 INFO L78 Accepts]: Start accepts. Automaton has 74509 states and 312891 transitions. Word has length 39 [2022-01-28 15:45:16,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:16,375 INFO L470 AbstractCegarLoop]: Abstraction has 74509 states and 312891 transitions. [2022-01-28 15:45:16,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.888888888888889) internal successors, (70), 17 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 74509 states and 312891 transitions. [2022-01-28 15:45:16,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:45:16,584 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:16,584 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:16,600 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-01-28 15:45:16,785 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,SelfDestructingSolverStorable74 [2022-01-28 15:45:16,785 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:45:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:16,786 INFO L85 PathProgramCache]: Analyzing trace with hash -2109989943, now seen corresponding path program 67 times [2022-01-28 15:45:16,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:16,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539798213] [2022-01-28 15:45:16,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:16,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:16,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:16,920 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:16,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539798213] [2022-01-28 15:45:16,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539798213] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:16,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084088233] [2022-01-28 15:45:16,920 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:45:16,920 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:16,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:16,921 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) [2022-01-28 15:45:16,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-01-28 15:45:16,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:16,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:45:16,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:17,348 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:45:17,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-01-28 15:45:17,386 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:17,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:17,388 INFO L388 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 34 treesize of output 14 [2022-01-28 15:45:17,431 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:17,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:17,576 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:45:17,576 INFO L388 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 60 treesize of output 78 [2022-01-28 15:45:17,990 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:45:17,990 INFO L388 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 47 treesize of output 61 [2022-01-28 15:45:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:18,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084088233] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:18,072 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:18,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-28 15:45:18,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616144569] [2022-01-28 15:45:18,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:18,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:45:18,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:18,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:45:18,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:45:18,073 INFO L87 Difference]: Start difference. First operand 74509 states and 312891 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) [2022-01-28 15:45:19,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:19,148 INFO L93 Difference]: Finished difference Result 107351 states and 451990 transitions. [2022-01-28 15:45:19,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-28 15:45:19,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) Word has length 39 [2022-01-28 15:45:19,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:19,667 INFO L225 Difference]: With dead ends: 107351 [2022-01-28 15:45:19,667 INFO L226 Difference]: Without dead ends: 107296 [2022-01-28 15:45:19,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2022-01-28 15:45:19,667 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 194 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 701 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 421 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:19,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 701 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 431 Invalid, 0 Unknown, 421 Unchecked, 0.2s Time] [2022-01-28 15:45:19,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107296 states. [2022-01-28 15:45:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107296 to 74648. [2022-01-28 15:45:21,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74648 states, 74647 states have (on average 4.199874073974842) internal successors, (313508), 74647 states have internal predecessors, (313508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74648 states to 74648 states and 313508 transitions. [2022-01-28 15:45:22,491 INFO L78 Accepts]: Start accepts. Automaton has 74648 states and 313508 transitions. Word has length 39 [2022-01-28 15:45:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:22,491 INFO L470 AbstractCegarLoop]: Abstraction has 74648 states and 313508 transitions. [2022-01-28 15:45:22,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) [2022-01-28 15:45:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74648 states and 313508 transitions. [2022-01-28 15:45:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:45:22,700 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:22,700 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:22,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2022-01-28 15:45:22,900 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,SelfDestructingSolverStorable75 [2022-01-28 15:45:22,900 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:45:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:22,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1916230925, now seen corresponding path program 68 times [2022-01-28 15:45:22,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:22,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322360339] [2022-01-28 15:45:22,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:22,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:23,043 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:23,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322360339] [2022-01-28 15:45:23,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322360339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:23,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262500110] [2022-01-28 15:45:23,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-28 15:45:23,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:23,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:23,045 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) [2022-01-28 15:45:23,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-01-28 15:45:23,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-28 15:45:23,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:23,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:45:23,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:23,458 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:45:23,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-01-28 15:45:23,487 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:23,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:23,488 INFO L388 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 34 treesize of output 14 [2022-01-28 15:45:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:23,530 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:23,927 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:45:23,928 INFO L388 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 60 treesize of output 78 [2022-01-28 15:45:24,099 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:45:24,099 INFO L388 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 47 treesize of output 61 [2022-01-28 15:45:24,180 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:24,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262500110] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:24,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:24,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-28 15:45:24,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038030091] [2022-01-28 15:45:24,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:24,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:45:24,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:24,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:45:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:45:24,181 INFO L87 Difference]: Start difference. First operand 74648 states and 313508 transitions. Second operand has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) [2022-01-28 15:45:25,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:25,198 INFO L93 Difference]: Finished difference Result 100817 states and 423418 transitions. [2022-01-28 15:45:25,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:45:25,198 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) Word has length 39 [2022-01-28 15:45:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:25,674 INFO L225 Difference]: With dead ends: 100817 [2022-01-28 15:45:25,674 INFO L226 Difference]: Without dead ends: 100762 [2022-01-28 15:45:25,674 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:45:25,674 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 170 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 860 SdHoareTripleChecker+Invalid, 1116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 553 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:25,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 860 Invalid, 1116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 554 Invalid, 0 Unknown, 553 Unchecked, 0.2s Time] [2022-01-28 15:45:25,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100762 states. [2022-01-28 15:45:27,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100762 to 73502. [2022-01-28 15:45:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73502 states, 73501 states have (on average 4.197099359192392) internal successors, (308491), 73501 states have internal predecessors, (308491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:28,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73502 states to 73502 states and 308491 transitions. [2022-01-28 15:45:28,690 INFO L78 Accepts]: Start accepts. Automaton has 73502 states and 308491 transitions. Word has length 39 [2022-01-28 15:45:28,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:28,690 INFO L470 AbstractCegarLoop]: Abstraction has 73502 states and 308491 transitions. [2022-01-28 15:45:28,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5555555555555554) internal successors, (64), 17 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) [2022-01-28 15:45:28,690 INFO L276 IsEmpty]: Start isEmpty. Operand 73502 states and 308491 transitions. [2022-01-28 15:45:28,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:45:28,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:28,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:28,918 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2022-01-28 15:45:29,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:29,103 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:45:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:29,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1067608453, now seen corresponding path program 69 times [2022-01-28 15:45:29,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:29,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958386353] [2022-01-28 15:45:29,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:29,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:29,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:29,234 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:29,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:29,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958386353] [2022-01-28 15:45:29,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958386353] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:29,235 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710738554] [2022-01-28 15:45:29,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-28 15:45:29,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:29,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:29,236 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) [2022-01-28 15:45:29,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-01-28 15:45:29,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-01-28 15:45:29,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:29,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-28 15:45:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:29,572 INFO L354 Elim1Store]: treesize reduction 10, result has 65.5 percent of original size [2022-01-28 15:45:29,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 58 [2022-01-28 15:45:29,628 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-01-28 15:45:29,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 24 [2022-01-28 15:45:29,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:29,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:30,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:30,682 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-01-28 15:45:30,683 INFO L388 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 3 new quantified variables, introduced 5 case distinctions, treesize of input 55 treesize of output 59 [2022-01-28 15:45:30,830 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:45:30,830 INFO L388 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 48 treesize of output 62 [2022-01-28 15:45:30,916 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:30,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [710738554] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:30,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:30,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 24 [2022-01-28 15:45:30,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342427731] [2022-01-28 15:45:30,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:30,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:45:30,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:30,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:45:30,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:45:30,917 INFO L87 Difference]: Start difference. First operand 73502 states and 308491 transitions. Second operand has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:33,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:33,170 INFO L93 Difference]: Finished difference Result 141605 states and 594640 transitions. [2022-01-28 15:45:33,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 15:45:33,171 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:45:33,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:33,875 INFO L225 Difference]: With dead ends: 141605 [2022-01-28 15:45:33,875 INFO L226 Difference]: Without dead ends: 141495 [2022-01-28 15:45:33,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 58 SyntacticMatches, 6 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=239, Invalid=1401, Unknown=0, NotChecked=0, Total=1640 [2022-01-28 15:45:33,875 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 449 mSDsluCounter, 1872 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 1381 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 778 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:33,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 1381 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1152 Invalid, 0 Unknown, 778 Unchecked, 0.5s Time] [2022-01-28 15:45:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141495 states. [2022-01-28 15:45:36,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141495 to 71747. [2022-01-28 15:45:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71747 states, 71746 states have (on average 4.196401193097873) internal successors, (301075), 71746 states have internal predecessors, (301075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:37,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71747 states to 71747 states and 301075 transitions. [2022-01-28 15:45:37,402 INFO L78 Accepts]: Start accepts. Automaton has 71747 states and 301075 transitions. Word has length 39 [2022-01-28 15:45:37,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:37,402 INFO L470 AbstractCegarLoop]: Abstraction has 71747 states and 301075 transitions. [2022-01-28 15:45:37,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.36) internal successors, (84), 24 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:37,402 INFO L276 IsEmpty]: Start isEmpty. Operand 71747 states and 301075 transitions. [2022-01-28 15:45:37,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:45:37,639 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:37,639 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:37,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2022-01-28 15:45:37,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:37,855 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:45:37,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:37,856 INFO L85 PathProgramCache]: Analyzing trace with hash 234109921, now seen corresponding path program 70 times [2022-01-28 15:45:37,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:37,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144934772] [2022-01-28 15:45:37,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:37,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:37,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:37,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144934772] [2022-01-28 15:45:37,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144934772] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:37,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188628384] [2022-01-28 15:45:37,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-28 15:45:37,982 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:37,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:37,983 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) [2022-01-28 15:45:37,983 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-01-28 15:45:38,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-28 15:45:38,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:38,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:45:38,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:38,422 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:45:38,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-01-28 15:45:38,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:38,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:38,483 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:38,484 INFO L388 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 34 treesize of output 14 [2022-01-28 15:45:38,504 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:38,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:38,654 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:45:38,655 INFO L388 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 60 treesize of output 78 [2022-01-28 15:45:38,830 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:45:38,830 INFO L388 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 47 treesize of output 61 [2022-01-28 15:45:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:38,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188628384] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:38,906 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:38,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-28 15:45:38,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524663333] [2022-01-28 15:45:38,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:38,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:45:38,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:38,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:45:38,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:45:38,907 INFO L87 Difference]: Start difference. First operand 71747 states and 301075 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:40,340 INFO L93 Difference]: Finished difference Result 111853 states and 469594 transitions. [2022-01-28 15:45:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-28 15:45:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:45:40,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:40,879 INFO L225 Difference]: With dead ends: 111853 [2022-01-28 15:45:40,880 INFO L226 Difference]: Without dead ends: 111846 [2022-01-28 15:45:40,880 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 64 SyntacticMatches, 7 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2022-01-28 15:45:40,880 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 176 mSDsluCounter, 1102 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 1088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 463 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:40,880 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 852 Invalid, 1088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 616 Invalid, 0 Unknown, 463 Unchecked, 0.3s Time] [2022-01-28 15:45:41,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111846 states. [2022-01-28 15:45:43,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111846 to 77527. [2022-01-28 15:45:43,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77527 states, 77526 states have (on average 4.201390501251193) internal successors, (325717), 77526 states have internal predecessors, (325717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77527 states to 77527 states and 325717 transitions. [2022-01-28 15:45:43,797 INFO L78 Accepts]: Start accepts. Automaton has 77527 states and 325717 transitions. Word has length 39 [2022-01-28 15:45:43,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:45:43,797 INFO L470 AbstractCegarLoop]: Abstraction has 77527 states and 325717 transitions. [2022-01-28 15:45:43,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 77527 states and 325717 transitions. [2022-01-28 15:45:43,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:45:43,998 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:45:43,998 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:45:44,014 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-01-28 15:45:44,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-01-28 15:45:44,199 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:45:44,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:45:44,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1392633403, now seen corresponding path program 71 times [2022-01-28 15:45:44,199 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:45:44,199 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683193720] [2022-01-28 15:45:44,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:45:44,200 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:45:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:45:44,332 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:44,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:45:44,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683193720] [2022-01-28 15:45:44,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683193720] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:45:44,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587654075] [2022-01-28 15:45:44,333 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-28 15:45:44,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:45:44,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:45:44,334 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) [2022-01-28 15:45:44,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-01-28 15:45:44,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-28 15:45:44,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:45:44,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 36 conjunts are in the unsatisfiable core [2022-01-28 15:45:44,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:45:44,847 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:44,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:44,848 INFO L388 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 59 treesize of output 39 [2022-01-28 15:45:45,143 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:45:45,144 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-01-28 15:45:45,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:45,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:45:45,443 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:45:45,443 INFO L388 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 60 treesize of output 78 [2022-01-28 15:45:45,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:45,656 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:45,657 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:45:45,657 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:45:45,658 INFO L388 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 19 [2022-01-28 15:45:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:45:45,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587654075] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:45:45,700 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:45:45,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-01-28 15:45:45,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383783290] [2022-01-28 15:45:45,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:45:45,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-28 15:45:45,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:45:45,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-28 15:45:45,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2022-01-28 15:45:45,701 INFO L87 Difference]: Start difference. First operand 77527 states and 325717 transitions. Second operand has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:45:53,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:45:53,369 INFO L93 Difference]: Finished difference Result 238463 states and 992917 transitions. [2022-01-28 15:45:53,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-28 15:45:53,369 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:45:53,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:45:54,924 INFO L225 Difference]: With dead ends: 238463 [2022-01-28 15:45:54,924 INFO L226 Difference]: Without dead ends: 238104 [2022-01-28 15:45:54,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 57 SyntacticMatches, 5 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6197 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2112, Invalid=14918, Unknown=0, NotChecked=0, Total=17030 [2022-01-28 15:45:54,925 INFO L933 BasicCegarLoop]: 189 mSDtfsCounter, 1454 mSDsluCounter, 3354 mSDsCounter, 0 mSdLazyCounter, 3116 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1454 SdHoareTripleChecker+Valid, 2559 SdHoareTripleChecker+Invalid, 3373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 3116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-28 15:45:54,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1454 Valid, 2559 Invalid, 3373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 3116 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-28 15:45:55,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238104 states. [2022-01-28 15:46:00,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238104 to 108164. [2022-01-28 15:46:00,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108164 states, 108163 states have (on average 4.283414846111887) internal successors, (463307), 108163 states have internal predecessors, (463307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:01,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108164 states to 108164 states and 463307 transitions. [2022-01-28 15:46:01,441 INFO L78 Accepts]: Start accepts. Automaton has 108164 states and 463307 transitions. Word has length 39 [2022-01-28 15:46:01,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:01,441 INFO L470 AbstractCegarLoop]: Abstraction has 108164 states and 463307 transitions. [2022-01-28 15:46:01,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.730769230769231) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:01,441 INFO L276 IsEmpty]: Start isEmpty. Operand 108164 states and 463307 transitions. [2022-01-28 15:46:01,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:46:01,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:01,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:01,795 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-01-28 15:46:01,979 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,SelfDestructingSolverStorable79 [2022-01-28 15:46:01,980 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:46:01,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:01,980 INFO L85 PathProgramCache]: Analyzing trace with hash 1359791373, now seen corresponding path program 72 times [2022-01-28 15:46:01,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:01,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575325483] [2022-01-28 15:46:01,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:01,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:01,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:02,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:46:02,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575325483] [2022-01-28 15:46:02,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575325483] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:46:02,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172325523] [2022-01-28 15:46:02,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-28 15:46:02,114 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:02,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:46:02,115 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) [2022-01-28 15:46:02,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-01-28 15:46:02,146 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-28 15:46:02,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-28 15:46:02,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 33 conjunts are in the unsatisfiable core [2022-01-28 15:46:02,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:46:02,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:02,617 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:02,617 INFO L388 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 51 treesize of output 39 [2022-01-28 15:46:02,654 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:46:02,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 14 [2022-01-28 15:46:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:02,688 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:46:03,201 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:46:03,202 INFO L388 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 56 treesize of output 74 [2022-01-28 15:46:03,554 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:03,555 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:03,571 INFO L354 Elim1Store]: treesize reduction 8, result has 75.8 percent of original size [2022-01-28 15:46:03,572 INFO L388 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 41 treesize of output 49 [2022-01-28 15:46:03,669 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:03,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172325523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:46:03,670 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:46:03,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 24 [2022-01-28 15:46:03,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108560016] [2022-01-28 15:46:03,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:46:03,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-28 15:46:03,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:46:03,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-28 15:46:03,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2022-01-28 15:46:03,671 INFO L87 Difference]: Start difference. First operand 108164 states and 463307 transitions. Second operand has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:05,330 INFO L93 Difference]: Finished difference Result 139512 states and 592968 transitions. [2022-01-28 15:46:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-28 15:46:05,330 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:46:05,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:06,014 INFO L225 Difference]: With dead ends: 139512 [2022-01-28 15:46:06,015 INFO L226 Difference]: Without dead ends: 139474 [2022-01-28 15:46:06,015 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=1062, Unknown=0, NotChecked=0, Total=1260 [2022-01-28 15:46:06,015 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 311 mSDsluCounter, 1524 mSDsCounter, 0 mSdLazyCounter, 311 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 1188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 311 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 865 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:06,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 1323 Invalid, 1188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 311 Invalid, 0 Unknown, 865 Unchecked, 0.1s Time] [2022-01-28 15:46:06,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139474 states. [2022-01-28 15:46:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139474 to 109083. [2022-01-28 15:46:09,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109083 states, 109082 states have (on average 4.281182963275334) internal successors, (467000), 109082 states have internal predecessors, (467000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:10,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109083 states to 109083 states and 467000 transitions. [2022-01-28 15:46:10,500 INFO L78 Accepts]: Start accepts. Automaton has 109083 states and 467000 transitions. Word has length 39 [2022-01-28 15:46:10,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-28 15:46:10,501 INFO L470 AbstractCegarLoop]: Abstraction has 109083 states and 467000 transitions. [2022-01-28 15:46:10,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.6) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:10,501 INFO L276 IsEmpty]: Start isEmpty. Operand 109083 states and 467000 transitions. [2022-01-28 15:46:10,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-28 15:46:10,831 INFO L506 BasicCegarLoop]: Found error trace [2022-01-28 15:46:10,831 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-28 15:46:10,846 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-01-28 15:46:11,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:11,032 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION (and 1 more)] === [2022-01-28 15:46:11,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-28 15:46:11,032 INFO L85 PathProgramCache]: Analyzing trace with hash -73529211, now seen corresponding path program 73 times [2022-01-28 15:46:11,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-28 15:46:11,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320781882] [2022-01-28 15:46:11,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-28 15:46:11,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-28 15:46:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:11,164 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:11,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-28 15:46:11,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320781882] [2022-01-28 15:46:11,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320781882] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-28 15:46:11,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951944472] [2022-01-28 15:46:11,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-28 15:46:11,165 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-28 15:46:11,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-28 15:46:11,166 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) [2022-01-28 15:46:11,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-01-28 15:46:11,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-28 15:46:11,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 35 conjunts are in the unsatisfiable core [2022-01-28 15:46:11,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-28 15:46:11,528 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2022-01-28 15:46:11,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 39 [2022-01-28 15:46:11,640 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-28 15:46:11,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-28 15:46:11,641 INFO L388 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 34 treesize of output 14 [2022-01-28 15:46:11,661 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:11,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-28 15:46:12,010 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:46:12,011 INFO L388 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 60 treesize of output 78 [2022-01-28 15:46:12,191 INFO L354 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-28 15:46:12,191 INFO L388 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 47 treesize of output 61 [2022-01-28 15:46:12,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-28 15:46:12,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951944472] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-28 15:46:12,265 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-28 15:46:12,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-01-28 15:46:12,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633051366] [2022-01-28 15:46:12,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-28 15:46:12,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-28 15:46:12,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-28 15:46:12,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-28 15:46:12,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-01-28 15:46:12,266 INFO L87 Difference]: Start difference. First operand 109083 states and 467000 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-28 15:46:13,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-28 15:46:13,527 INFO L93 Difference]: Finished difference Result 140021 states and 597316 transitions. [2022-01-28 15:46:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-28 15:46:13,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-01-28 15:46:13,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-28 15:46:14,496 INFO L225 Difference]: With dead ends: 140021 [2022-01-28 15:46:14,496 INFO L226 Difference]: Without dead ends: 140014 [2022-01-28 15:46:14,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2022-01-28 15:46:14,496 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 173 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 322 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-28 15:46:14,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 743 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 419 Invalid, 0 Unknown, 322 Unchecked, 0.2s Time] [2022-01-28 15:46:14,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140014 states.