/usr/bin/java -Xmx16000000000 -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/max-array-hom.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-bc79526 [2022-01-18 06:52:00,499 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-18 06:52:00,500 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-18 06:52:00,528 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-18 06:52:00,571 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 [2022-01-18 06:52:00,602 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-18 06:52:00,602 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-18 06:52:00,602 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-01-18 06:52:00,602 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-01-18 06:52:00,603 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-01-18 06:52:00,603 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-01-18 06:52:00,603 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-01-18 06:52:00,603 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-01-18 06:52:00,603 INFO L138 SettingsManager]: * Use SBE=true [2022-01-18 06:52:00,603 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-18 06:52:00,603 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-18 06:52:00,604 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-18 06:52:00,604 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-18 06:52:00,604 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-18 06:52:00,604 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-18 06:52:00,604 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-18 06:52:00,604 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-18 06:52:00,604 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-18 06:52:00,604 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-18 06:52:00,604 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-18 06:52:00,604 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-18 06:52:00,604 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-18 06:52:00,605 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-18 06:52:00,605 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-18 06:52:00,605 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-18 06:52:00,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:52:00,605 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-18 06:52:00,605 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-01-18 06:52:00,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-01-18 06:52:00,605 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-01-18 06:52:00,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-01-18 06:52:00,606 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2022-01-18 06:52:00,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-18 06:52:00,606 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2022-01-18 06:52:00,753 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-18 06:52:00,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-18 06:52:00,769 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-18 06:52:00,770 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2022-01-18 06:52:00,773 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2022-01-18 06:52:00,774 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl [2022-01-18 06:52:00,774 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/max-array-hom.wvr.bpl' [2022-01-18 06:52:00,802 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-18 06:52:00,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-18 06:52:00,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-01-18 06:52:00,803 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-01-18 06:52:00,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-01-18 06:52:00,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,822 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,827 INFO L137 Inliner]: procedures = 4, calls = 3, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2022-01-18 06:52:00,829 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-01-18 06:52:00,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-18 06:52:00,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-18 06:52:00,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-18 06:52:00,836 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,836 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,843 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,844 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-18 06:52:00,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-18 06:52:00,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-18 06:52:00,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-18 06:52:00,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/1) ... [2022-01-18 06:52:00,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-18 06:52:00,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:00,904 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) [2022-01-18 06:52:00,926 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 [2022-01-18 06:52:00,937 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2022-01-18 06:52:00,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-01-18 06:52:00,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-01-18 06:52:00,938 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2022-01-18 06:52:00,938 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-01-18 06:52:00,938 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-01-18 06:52:00,938 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2022-01-18 06:52:00,938 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-18 06:52:00,939 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-18 06:52:00,939 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2022-01-18 06:52:00,939 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-01-18 06:52:00,939 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-01-18 06:52:00,940 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-01-18 06:52:00,982 INFO L234 CfgBuilder]: Building ICFG [2022-01-18 06:52:00,983 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-18 06:52:01,069 INFO L275 CfgBuilder]: Performing block encoding [2022-01-18 06:52:01,079 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-18 06:52:01,079 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-01-18 06:52:01,080 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:52:01 BoogieIcfgContainer [2022-01-18 06:52:01,080 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-18 06:52:01,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-18 06:52:01,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-18 06:52:01,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-18 06:52:01,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 18.01 06:52:00" (1/2) ... [2022-01-18 06:52:01,099 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a27f323 and model type max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.01 06:52:01, skipping insertion in model container [2022-01-18 06:52:01,099 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.01 06:52:01" (2/2) ... [2022-01-18 06:52:01,100 INFO L111 eAbstractionObserver]: Analyzing ICFG max-array-hom.wvr.bpl [2022-01-18 06:52:01,103 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-01-18 06:52:01,103 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-01-18 06:52:01,103 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-18 06:52:01,104 INFO L513 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-01-18 06:52:01,142 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-01-18 06:52:01,182 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-18 06:52:01,188 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 [2022-01-18 06:52:01,188 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-01-18 06:52:01,194 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 36 places, 29 transitions, 82 flow [2022-01-18 06:52:01,237 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,238 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-01-18 06:52:01,244 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:01,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:52:01,245 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:01,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:01,250 INFO L85 PathProgramCache]: Analyzing trace with hash 541406590, now seen corresponding path program 1 times [2022-01-18 06:52:01,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:01,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28841255] [2022-01-18 06:52:01,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:01,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:01,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:01,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:01,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28841255] [2022-01-18 06:52:01,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28841255] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:52:01,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:52:01,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-18 06:52:01,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635320063] [2022-01-18 06:52:01,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:52:01,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-18 06:52:01,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:01,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-18 06:52:01,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:52:01,409 INFO L87 Difference]: Start difference. First operand has 112 states, 111 states have (on average 2.810810810810811) internal successors, (312), 111 states have internal predecessors, (312), 0 states have call successors, (0), 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 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:01,450 INFO L93 Difference]: Finished difference Result 217 states and 617 transitions. [2022-01-18 06:52:01,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-18 06:52:01,451 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-01-18 06:52:01,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:01,459 INFO L225 Difference]: With dead ends: 217 [2022-01-18 06:52:01,459 INFO L226 Difference]: Without dead ends: 202 [2022-01-18 06:52:01,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-18 06:52:01,463 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:01,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 27 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:52:01,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-01-18 06:52:01,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 149. [2022-01-18 06:52:01,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 2.831081081081081) internal successors, (419), 148 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 419 transitions. [2022-01-18 06:52:01,523 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 419 transitions. Word has length 18 [2022-01-18 06:52:01,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:01,523 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 419 transitions. [2022-01-18 06:52:01,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,524 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 419 transitions. [2022-01-18 06:52:01,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 06:52:01,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:01,525 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] [2022-01-18 06:52:01,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-18 06:52:01,525 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:01,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:01,526 INFO L85 PathProgramCache]: Analyzing trace with hash -1033477442, now seen corresponding path program 1 times [2022-01-18 06:52:01,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:01,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070704418] [2022-01-18 06:52:01,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:01,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:01,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:01,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:01,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070704418] [2022-01-18 06:52:01,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070704418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:52:01,584 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:52:01,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:52:01,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522003065] [2022-01-18 06:52:01,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:52:01,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-18 06:52:01,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:01,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-18 06:52:01,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-18 06:52:01,586 INFO L87 Difference]: Start difference. First operand 149 states and 419 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:01,672 INFO L93 Difference]: Finished difference Result 158 states and 445 transitions. [2022-01-18 06:52:01,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-18 06:52:01,672 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 06:52:01,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:01,674 INFO L225 Difference]: With dead ends: 158 [2022-01-18 06:52:01,674 INFO L226 Difference]: Without dead ends: 158 [2022-01-18 06:52:01,675 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 [2022-01-18 06:52:01,676 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 34 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:01,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 15 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:52:01,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-01-18 06:52:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 133. [2022-01-18 06:52:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 2.8333333333333335) internal successors, (374), 132 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 374 transitions. [2022-01-18 06:52:01,692 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 374 transitions. Word has length 20 [2022-01-18 06:52:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:01,692 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 374 transitions. [2022-01-18 06:52:01,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,693 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 374 transitions. [2022-01-18 06:52:01,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-01-18 06:52:01,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:01,694 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] [2022-01-18 06:52:01,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-18 06:52:01,694 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:01,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:01,695 INFO L85 PathProgramCache]: Analyzing trace with hash -324870244, now seen corresponding path program 1 times [2022-01-18 06:52:01,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:01,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913905741] [2022-01-18 06:52:01,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:01,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:01,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:01,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:01,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:01,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913905741] [2022-01-18 06:52:01,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913905741] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-18 06:52:01,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-18 06:52:01,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-18 06:52:01,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42013859] [2022-01-18 06:52:01,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-18 06:52:01,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-18 06:52:01,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:01,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-18 06:52:01,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-18 06:52:01,764 INFO L87 Difference]: Start difference. First operand 133 states and 374 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:01,832 INFO L93 Difference]: Finished difference Result 183 states and 522 transitions. [2022-01-18 06:52:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-18 06:52:01,833 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-01-18 06:52:01,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:01,836 INFO L225 Difference]: With dead ends: 183 [2022-01-18 06:52:01,836 INFO L226 Difference]: Without dead ends: 183 [2022-01-18 06:52:01,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-18 06:52:01,837 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 77 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:01,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 13 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-18 06:52:01,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-18 06:52:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-01-18 06:52:01,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 2.8535031847133756) internal successors, (448), 157 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 448 transitions. [2022-01-18 06:52:01,858 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 448 transitions. Word has length 20 [2022-01-18 06:52:01,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:01,858 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 448 transitions. [2022-01-18 06:52:01,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 448 transitions. [2022-01-18 06:52:01,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:52:01,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:01,859 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] [2022-01-18 06:52:01,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-18 06:52:01,860 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:01,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:01,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1959936804, now seen corresponding path program 1 times [2022-01-18 06:52:01,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:01,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881772693] [2022-01-18 06:52:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:01,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:02,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:02,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:02,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881772693] [2022-01-18 06:52:02,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881772693] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:02,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810358291] [2022-01-18 06:52:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:02,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:02,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:02,288 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) [2022-01-18 06:52:02,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-01-18 06:52:02,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:02,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:52:02,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:02,738 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 50 treesize of output 38 [2022-01-18 06:52:02,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:02,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:03,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:03,255 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 67 [2022-01-18 06:52:03,596 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:03,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810358291] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:03,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:03,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:52:03,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263550477] [2022-01-18 06:52:03,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:03,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-18 06:52:03,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:03,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-18 06:52:03,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-01-18 06:52:03,598 INFO L87 Difference]: Start difference. First operand 158 states and 448 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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) [2022-01-18 06:52:03,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:03,910 INFO L93 Difference]: Finished difference Result 366 states and 1043 transitions. [2022-01-18 06:52:03,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-18 06:52:03,911 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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 22 [2022-01-18 06:52:03,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:03,913 INFO L225 Difference]: With dead ends: 366 [2022-01-18 06:52:03,913 INFO L226 Difference]: Without dead ends: 351 [2022-01-18 06:52:03,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=123, Invalid=429, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:52:03,915 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 201 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 205 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:03,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 55 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 205 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:52:03,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-01-18 06:52:03,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 224. [2022-01-18 06:52:03,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.8699551569506725) internal successors, (640), 223 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:03,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 640 transitions. [2022-01-18 06:52:03,931 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 640 transitions. Word has length 22 [2022-01-18 06:52:03,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:03,931 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 640 transitions. [2022-01-18 06:52:03,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 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) [2022-01-18 06:52:03,931 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 640 transitions. [2022-01-18 06:52:03,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:52:03,933 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:03,933 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] [2022-01-18 06:52:03,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:04,139 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 [2022-01-18 06:52:04,140 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:04,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:04,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2127745896, now seen corresponding path program 2 times [2022-01-18 06:52:04,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:04,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730191987] [2022-01-18 06:52:04,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:04,141 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:04,336 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:04,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:04,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730191987] [2022-01-18 06:52:04,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730191987] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:04,337 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884710254] [2022-01-18 06:52:04,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:04,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:04,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:04,338 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) [2022-01-18 06:52:04,340 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-01-18 06:52:04,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:04,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:04,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:52:04,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:04,589 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:04,590 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 41 [2022-01-18 06:52:04,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:04,833 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:05,091 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:05,092 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 75 treesize of output 67 [2022-01-18 06:52:05,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:05,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884710254] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:05,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:05,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 19 [2022-01-18 06:52:05,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233717799] [2022-01-18 06:52:05,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:05,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-18 06:52:05,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:05,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-18 06:52:05,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:52:05,358 INFO L87 Difference]: Start difference. First operand 224 states and 640 transitions. Second operand has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:06,176 INFO L93 Difference]: Finished difference Result 478 states and 1385 transitions. [2022-01-18 06:52:06,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:52:06,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:52:06,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:06,181 INFO L225 Difference]: With dead ends: 478 [2022-01-18 06:52:06,181 INFO L226 Difference]: Without dead ends: 463 [2022-01-18 06:52:06,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=229, Invalid=763, Unknown=0, NotChecked=0, Total=992 [2022-01-18 06:52:06,182 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 286 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 570 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:06,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 125 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 570 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:06,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-18 06:52:06,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 229. [2022-01-18 06:52:06,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 2.912280701754386) internal successors, (664), 228 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 664 transitions. [2022-01-18 06:52:06,189 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 664 transitions. Word has length 22 [2022-01-18 06:52:06,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:06,189 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 664 transitions. [2022-01-18 06:52:06,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.1) internal successors, (62), 19 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 664 transitions. [2022-01-18 06:52:06,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:52:06,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:06,191 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] [2022-01-18 06:52:06,209 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:06,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:06,406 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:06,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:06,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1828972448, now seen corresponding path program 3 times [2022-01-18 06:52:06,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:06,406 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303529414] [2022-01-18 06:52:06,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:06,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:06,562 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:06,562 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:06,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303529414] [2022-01-18 06:52:06,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303529414] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:06,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668298336] [2022-01-18 06:52:06,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:06,562 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:06,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:06,563 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) [2022-01-18 06:52:06,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-01-18 06:52:06,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 06:52:06,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:06,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:52:06,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:06,722 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2022-01-18 06:52:06,783 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:06,783 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:06,899 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:06,900 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-01-18 06:52:07,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:07,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668298336] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:07,180 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:07,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 06:52:07,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324148103] [2022-01-18 06:52:07,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:07,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:52:07,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:07,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:52:07,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:52:07,182 INFO L87 Difference]: Start difference. First operand 229 states and 664 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:07,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:07,595 INFO L93 Difference]: Finished difference Result 433 states and 1240 transitions. [2022-01-18 06:52:07,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-18 06:52:07,595 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:52:07,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:07,597 INFO L225 Difference]: With dead ends: 433 [2022-01-18 06:52:07,597 INFO L226 Difference]: Without dead ends: 418 [2022-01-18 06:52:07,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:52:07,598 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 113 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:07,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 131 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:52:07,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-01-18 06:52:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 241. [2022-01-18 06:52:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 2.8916666666666666) internal successors, (694), 240 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 694 transitions. [2022-01-18 06:52:07,604 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 694 transitions. Word has length 22 [2022-01-18 06:52:07,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:07,604 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 694 transitions. [2022-01-18 06:52:07,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:07,604 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 694 transitions. [2022-01-18 06:52:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:52:07,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:07,605 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] [2022-01-18 06:52:07,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:07,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:07,811 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:07,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:07,812 INFO L85 PathProgramCache]: Analyzing trace with hash -258146848, now seen corresponding path program 4 times [2022-01-18 06:52:07,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:07,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607093130] [2022-01-18 06:52:07,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:07,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:07,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:07,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:07,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607093130] [2022-01-18 06:52:07,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607093130] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:07,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700630083] [2022-01-18 06:52:07,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:07,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:07,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:07,965 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) [2022-01-18 06:52:07,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-01-18 06:52:07,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:07,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:07,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-01-18 06:52:07,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:08,138 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:08,139 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 41 [2022-01-18 06:52:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:08,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:08,584 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:08,585 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-01-18 06:52:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:08,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700630083] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:08,839 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:08,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2022-01-18 06:52:08,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739386309] [2022-01-18 06:52:08,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:08,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 06:52:08,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:08,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 06:52:08,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-01-18 06:52:08,840 INFO L87 Difference]: Start difference. First operand 241 states and 694 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:09,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:09,117 INFO L93 Difference]: Finished difference Result 381 states and 1109 transitions. [2022-01-18 06:52:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:52:09,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-01-18 06:52:09,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:09,119 INFO L225 Difference]: With dead ends: 381 [2022-01-18 06:52:09,119 INFO L226 Difference]: Without dead ends: 366 [2022-01-18 06:52:09,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2022-01-18 06:52:09,119 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 122 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:09,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 104 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 243 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-01-18 06:52:09,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2022-01-18 06:52:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 250. [2022-01-18 06:52:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.9437751004016066) internal successors, (733), 249 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 733 transitions. [2022-01-18 06:52:09,125 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 733 transitions. Word has length 22 [2022-01-18 06:52:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:09,126 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 733 transitions. [2022-01-18 06:52:09,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 18 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 733 transitions. [2022-01-18 06:52:09,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:52:09,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:09,127 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] [2022-01-18 06:52:09,143 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:09,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:09,339 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:09,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1789401154, now seen corresponding path program 5 times [2022-01-18 06:52:09,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:09,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415972602] [2022-01-18 06:52:09,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:09,340 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:09,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:09,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:09,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415972602] [2022-01-18 06:52:09,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415972602] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:09,511 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954702201] [2022-01-18 06:52:09,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:09,511 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:09,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:09,512 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) [2022-01-18 06:52:09,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-01-18 06:52:09,536 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:09,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:09,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 21 conjunts are in the unsatisfiable core [2022-01-18 06:52:09,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:09,741 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:09,741 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 41 [2022-01-18 06:52:10,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:10,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:10,412 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:10,412 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-01-18 06:52:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:10,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954702201] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:10,793 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:10,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2022-01-18 06:52:10,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187015753] [2022-01-18 06:52:10,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:10,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-18 06:52:10,794 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:10,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-18 06:52:10,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2022-01-18 06:52:10,794 INFO L87 Difference]: Start difference. First operand 250 states and 733 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2022-01-18 06:52:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:14,584 INFO L93 Difference]: Finished difference Result 962 states and 2846 transitions. [2022-01-18 06:52:14,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:52:14,584 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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 22 [2022-01-18 06:52:14,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:14,588 INFO L225 Difference]: With dead ends: 962 [2022-01-18 06:52:14,588 INFO L226 Difference]: Without dead ends: 932 [2022-01-18 06:52:14,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=912, Invalid=2870, Unknown=0, NotChecked=0, Total=3782 [2022-01-18 06:52:14,589 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 442 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 442 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:14,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [442 Valid, 209 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 642 Invalid, 0 Unknown, 99 Unchecked, 0.5s Time] [2022-01-18 06:52:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 932 states. [2022-01-18 06:52:14,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 932 to 261. [2022-01-18 06:52:14,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 3.019230769230769) internal successors, (785), 260 states have internal predecessors, (785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:14,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 785 transitions. [2022-01-18 06:52:14,597 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 785 transitions. Word has length 22 [2022-01-18 06:52:14,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:14,597 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 785 transitions. [2022-01-18 06:52:14,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 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) [2022-01-18 06:52:14,597 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 785 transitions. [2022-01-18 06:52:14,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-01-18 06:52:14,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:14,598 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] [2022-01-18 06:52:14,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:14,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:14,799 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:14,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:14,799 INFO L85 PathProgramCache]: Analyzing trace with hash -941439742, now seen corresponding path program 6 times [2022-01-18 06:52:14,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:14,799 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799632950] [2022-01-18 06:52:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:14,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:14,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:14,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:14,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799632950] [2022-01-18 06:52:14,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799632950] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:14,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029576526] [2022-01-18 06:52:14,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:14,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:14,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:14,945 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) [2022-01-18 06:52:14,946 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-01-18 06:52:14,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 06:52:14,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:14,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 18 conjunts are in the unsatisfiable core [2022-01-18 06:52:14,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:15,130 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:15,130 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select 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 41 [2022-01-18 06:52:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:15,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:15,574 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:15,574 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 67 [2022-01-18 06:52:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:15,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029576526] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:15,908 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:15,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2022-01-18 06:52:15,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132680079] [2022-01-18 06:52:15,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:15,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-18 06:52:15,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:15,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-18 06:52:15,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2022-01-18 06:52:15,909 INFO L87 Difference]: Start difference. First operand 261 states and 785 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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) [2022-01-18 06:52:17,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:17,026 INFO L93 Difference]: Finished difference Result 585 states and 1722 transitions. [2022-01-18 06:52:17,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-18 06:52:17,026 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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 22 [2022-01-18 06:52:17,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:17,029 INFO L225 Difference]: With dead ends: 585 [2022-01-18 06:52:17,029 INFO L226 Difference]: Without dead ends: 570 [2022-01-18 06:52:17,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2022-01-18 06:52:17,030 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 187 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:17,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 146 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:17,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-01-18 06:52:17,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 258. [2022-01-18 06:52:17,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 257 states have (on average 2.9961089494163424) internal successors, (770), 257 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:17,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 770 transitions. [2022-01-18 06:52:17,037 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 770 transitions. Word has length 22 [2022-01-18 06:52:17,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:17,037 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 770 transitions. [2022-01-18 06:52:17,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 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) [2022-01-18 06:52:17,037 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 770 transitions. [2022-01-18 06:52:17,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:17,038 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:17,038 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] [2022-01-18 06:52:17,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:17,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:17,258 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:17,258 INFO L85 PathProgramCache]: Analyzing trace with hash 976010682, now seen corresponding path program 7 times [2022-01-18 06:52:17,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:17,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253540536] [2022-01-18 06:52:17,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:17,258 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:17,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:17,306 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:17,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:17,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253540536] [2022-01-18 06:52:17,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253540536] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:17,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289099625] [2022-01-18 06:52:17,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:52:17,306 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:17,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:17,308 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) [2022-01-18 06:52:17,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-01-18 06:52:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:17,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:17,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:17,427 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:17,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:17,520 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:17,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289099625] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:17,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:17,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 06:52:17,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963528457] [2022-01-18 06:52:17,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:17,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:52:17,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:17,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:52:17,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:52:17,524 INFO L87 Difference]: Start difference. First operand 258 states and 770 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:18,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:18,289 INFO L93 Difference]: Finished difference Result 1123 states and 3194 transitions. [2022-01-18 06:52:18,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-18 06:52:18,289 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:18,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:18,293 INFO L225 Difference]: With dead ends: 1123 [2022-01-18 06:52:18,293 INFO L226 Difference]: Without dead ends: 1123 [2022-01-18 06:52:18,294 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=714, Invalid=2148, Unknown=0, NotChecked=0, Total=2862 [2022-01-18 06:52:18,294 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 287 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:18,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 190 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:18,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1123 states. [2022-01-18 06:52:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1123 to 322. [2022-01-18 06:52:18,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 322 states, 321 states have (on average 3.196261682242991) internal successors, (1026), 321 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:18,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 1026 transitions. [2022-01-18 06:52:18,304 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 1026 transitions. Word has length 24 [2022-01-18 06:52:18,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:18,304 INFO L470 AbstractCegarLoop]: Abstraction has 322 states and 1026 transitions. [2022-01-18 06:52:18,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 15 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 1026 transitions. [2022-01-18 06:52:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:18,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:18,305 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] [2022-01-18 06:52:18,321 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:18,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:18,521 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:18,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:18,522 INFO L85 PathProgramCache]: Analyzing trace with hash -308162, now seen corresponding path program 8 times [2022-01-18 06:52:18,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:18,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789486016] [2022-01-18 06:52:18,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:18,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:18,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:18,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789486016] [2022-01-18 06:52:18,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789486016] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:18,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188803330] [2022-01-18 06:52:18,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:18,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:18,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:18,587 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) [2022-01-18 06:52:18,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-01-18 06:52:18,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:18,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:18,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:18,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:18,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:18,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:18,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188803330] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:18,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:18,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:52:18,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784478428] [2022-01-18 06:52:18,781 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:18,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:52:18,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:18,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:52:18,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:52:18,782 INFO L87 Difference]: Start difference. First operand 322 states and 1026 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:20,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:20,453 INFO L93 Difference]: Finished difference Result 1814 states and 5087 transitions. [2022-01-18 06:52:20,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 06:52:20,454 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:52:20,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:20,460 INFO L225 Difference]: With dead ends: 1814 [2022-01-18 06:52:20,460 INFO L226 Difference]: Without dead ends: 1814 [2022-01-18 06:52:20,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4272 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2378, Invalid=8752, Unknown=0, NotChecked=0, Total=11130 [2022-01-18 06:52:20,464 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 461 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1135 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 1135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:20,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [461 Valid, 327 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 1135 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-18 06:52:20,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1814 states. [2022-01-18 06:52:20,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1814 to 315. [2022-01-18 06:52:20,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 3.1656050955414012) internal successors, (994), 314 states have internal predecessors, (994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:20,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 994 transitions. [2022-01-18 06:52:20,478 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 994 transitions. Word has length 24 [2022-01-18 06:52:20,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:20,479 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 994 transitions. [2022-01-18 06:52:20,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:20,479 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 994 transitions. [2022-01-18 06:52:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:20,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:20,480 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] [2022-01-18 06:52:20,498 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:20,703 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,SelfDestructingSolverStorable10 [2022-01-18 06:52:20,704 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:20,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:20,704 INFO L85 PathProgramCache]: Analyzing trace with hash 566643918, now seen corresponding path program 9 times [2022-01-18 06:52:20,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:20,704 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528832305] [2022-01-18 06:52:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:20,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:20,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:20,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:20,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528832305] [2022-01-18 06:52:20,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528832305] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:20,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9252398] [2022-01-18 06:52:20,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:20,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:20,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:20,761 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) [2022-01-18 06:52:20,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-01-18 06:52:20,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:52:20,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:20,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:20,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:20,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:20,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:20,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9252398] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:20,958 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:20,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:52:20,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304848688] [2022-01-18 06:52:20,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:20,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:52:20,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:20,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:52:20,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:52:20,959 INFO L87 Difference]: Start difference. First operand 315 states and 994 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:21,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:21,841 INFO L93 Difference]: Finished difference Result 1470 states and 4126 transitions. [2022-01-18 06:52:21,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-18 06:52:21,842 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:52:21,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:21,847 INFO L225 Difference]: With dead ends: 1470 [2022-01-18 06:52:21,847 INFO L226 Difference]: Without dead ends: 1470 [2022-01-18 06:52:21,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1095, Invalid=3327, Unknown=0, NotChecked=0, Total=4422 [2022-01-18 06:52:21,848 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 321 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 836 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 836 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:21,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 277 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 836 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:52:21,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1470 states. [2022-01-18 06:52:21,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1470 to 306. [2022-01-18 06:52:21,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 3.1475409836065573) internal successors, (960), 305 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:21,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 960 transitions. [2022-01-18 06:52:21,862 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 960 transitions. Word has length 24 [2022-01-18 06:52:21,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:21,862 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 960 transitions. [2022-01-18 06:52:21,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:21,863 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 960 transitions. [2022-01-18 06:52:21,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:21,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:21,863 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] [2022-01-18 06:52:21,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:22,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:22,079 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:22,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:22,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1502782590, now seen corresponding path program 1 times [2022-01-18 06:52:22,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:22,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208711541] [2022-01-18 06:52:22,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:22,080 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:22,121 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208711541] [2022-01-18 06:52:22,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208711541] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:22,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082469112] [2022-01-18 06:52:22,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:22,121 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:22,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:22,122 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) [2022-01-18 06:52:22,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-01-18 06:52:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:52:22,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:22,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:22,262 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:22,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082469112] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:22,262 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:22,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 06:52:22,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442249253] [2022-01-18 06:52:22,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:22,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:52:22,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:22,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:52:22,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:52:22,263 INFO L87 Difference]: Start difference. First operand 306 states and 960 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-01-18 06:52:22,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:22,386 INFO L93 Difference]: Finished difference Result 685 states and 2024 transitions. [2022-01-18 06:52:22,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-18 06:52:22,386 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-01-18 06:52:22,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:22,389 INFO L225 Difference]: With dead ends: 685 [2022-01-18 06:52:22,389 INFO L226 Difference]: Without dead ends: 679 [2022-01-18 06:52:22,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:52:22,389 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 154 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:22,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 42 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:52:22,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-18 06:52:22,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 429. [2022-01-18 06:52:22,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 3.2406542056074765) internal successors, (1387), 428 states have internal predecessors, (1387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:22,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1387 transitions. [2022-01-18 06:52:22,398 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1387 transitions. Word has length 24 [2022-01-18 06:52:22,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:22,398 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1387 transitions. [2022-01-18 06:52:22,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-01-18 06:52:22,398 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1387 transitions. [2022-01-18 06:52:22,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:22,399 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:22,399 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] [2022-01-18 06:52:22,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:22,615 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,SelfDestructingSolverStorable12 [2022-01-18 06:52:22,615 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:22,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:22,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1065813882, now seen corresponding path program 10 times [2022-01-18 06:52:22,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:22,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499494623] [2022-01-18 06:52:22,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:22,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:22,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:22,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:22,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:22,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499494623] [2022-01-18 06:52:22,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499494623] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:22,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082414240] [2022-01-18 06:52:22,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:22,652 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:22,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:22,653 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) [2022-01-18 06:52:22,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-01-18 06:52:22,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:22,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:22,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:22,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:22,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:22,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:22,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082414240] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:22,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:22,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2022-01-18 06:52:22,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640794799] [2022-01-18 06:52:22,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:22,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:52:22,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:22,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:52:22,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:52:22,835 INFO L87 Difference]: Start difference. First operand 429 states and 1387 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:23,113 INFO L93 Difference]: Finished difference Result 1159 states and 3490 transitions. [2022-01-18 06:52:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-18 06:52:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:52:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:23,118 INFO L225 Difference]: With dead ends: 1159 [2022-01-18 06:52:23,118 INFO L226 Difference]: Without dead ends: 1111 [2022-01-18 06:52:23,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=690, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:52:23,120 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 325 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:23,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 96 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:52:23,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1111 states. [2022-01-18 06:52:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1111 to 639. [2022-01-18 06:52:23,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 639 states, 638 states have (on average 3.3448275862068964) internal successors, (2134), 638 states have internal predecessors, (2134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:23,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 2134 transitions. [2022-01-18 06:52:23,144 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 2134 transitions. Word has length 24 [2022-01-18 06:52:23,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:23,144 INFO L470 AbstractCegarLoop]: Abstraction has 639 states and 2134 transitions. [2022-01-18 06:52:23,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:23,144 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 2134 transitions. [2022-01-18 06:52:23,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:23,146 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:23,146 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] [2022-01-18 06:52:23,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:23,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-01-18 06:52:23,362 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:23,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:23,362 INFO L85 PathProgramCache]: Analyzing trace with hash 359856550, now seen corresponding path program 2 times [2022-01-18 06:52:23,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:23,362 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171835504] [2022-01-18 06:52:23,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:23,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:23,385 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:23,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:23,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171835504] [2022-01-18 06:52:23,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171835504] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:23,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969937837] [2022-01-18 06:52:23,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:23,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:23,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:23,387 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) [2022-01-18 06:52:23,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-01-18 06:52:23,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:23,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:23,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:52:23,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:23,466 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:23,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969937837] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:23,522 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:23,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-01-18 06:52:23,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981219827] [2022-01-18 06:52:23,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:23,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:52:23,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:23,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:52:23,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:52:23,522 INFO L87 Difference]: Start difference. First operand 639 states and 2134 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-01-18 06:52:23,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:23,709 INFO L93 Difference]: Finished difference Result 1267 states and 3847 transitions. [2022-01-18 06:52:23,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-18 06:52:23,709 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 24 [2022-01-18 06:52:23,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:23,713 INFO L225 Difference]: With dead ends: 1267 [2022-01-18 06:52:23,713 INFO L226 Difference]: Without dead ends: 1267 [2022-01-18 06:52:23,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2022-01-18 06:52:23,714 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 171 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:23,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 71 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:52:23,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1267 states. [2022-01-18 06:52:23,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1267 to 683. [2022-01-18 06:52:23,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 682 states have (on average 3.3167155425219943) internal successors, (2262), 682 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:23,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 2262 transitions. [2022-01-18 06:52:23,745 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 2262 transitions. Word has length 24 [2022-01-18 06:52:23,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:23,745 INFO L470 AbstractCegarLoop]: Abstraction has 683 states and 2262 transitions. [2022-01-18 06:52:23,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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) [2022-01-18 06:52:23,745 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 2262 transitions. [2022-01-18 06:52:23,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:23,747 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:23,747 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] [2022-01-18 06:52:23,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:23,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-01-18 06:52:23,959 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:23,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:23,960 INFO L85 PathProgramCache]: Analyzing trace with hash -986825016, now seen corresponding path program 11 times [2022-01-18 06:52:23,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:23,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152830339] [2022-01-18 06:52:23,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:23,960 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:23,997 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:23,998 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:23,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152830339] [2022-01-18 06:52:23,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152830339] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:23,998 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767111758] [2022-01-18 06:52:23,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:23,998 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:23,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:23,999 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) [2022-01-18 06:52:24,000 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-01-18 06:52:24,020 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:24,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:24,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:24,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:24,080 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:24,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:24,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:24,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767111758] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:24,138 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:24,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:52:24,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717958936] [2022-01-18 06:52:24,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:24,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:52:24,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:24,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:52:24,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:52:24,139 INFO L87 Difference]: Start difference. First operand 683 states and 2262 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-01-18 06:52:24,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:24,608 INFO L93 Difference]: Finished difference Result 2268 states and 6749 transitions. [2022-01-18 06:52:24,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-18 06:52:24,609 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-01-18 06:52:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:24,616 INFO L225 Difference]: With dead ends: 2268 [2022-01-18 06:52:24,616 INFO L226 Difference]: Without dead ends: 2268 [2022-01-18 06:52:24,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2022-01-18 06:52:24,617 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 278 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:24,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 163 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:52:24,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2268 states. [2022-01-18 06:52:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2268 to 699. [2022-01-18 06:52:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 699 states, 698 states have (on average 3.312320916905444) internal successors, (2312), 698 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:24,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 699 states to 699 states and 2312 transitions. [2022-01-18 06:52:24,639 INFO L78 Accepts]: Start accepts. Automaton has 699 states and 2312 transitions. Word has length 24 [2022-01-18 06:52:24,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:24,639 INFO L470 AbstractCegarLoop]: Abstraction has 699 states and 2312 transitions. [2022-01-18 06:52:24,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-01-18 06:52:24,640 INFO L276 IsEmpty]: Start isEmpty. Operand 699 states and 2312 transitions. [2022-01-18 06:52:24,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:24,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:24,641 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] [2022-01-18 06:52:24,657 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:24,857 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,SelfDestructingSolverStorable15 [2022-01-18 06:52:24,857 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash -201910922, now seen corresponding path program 12 times [2022-01-18 06:52:24,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:24,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925280619] [2022-01-18 06:52:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:24,857 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:24,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:24,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:24,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:24,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925280619] [2022-01-18 06:52:24,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925280619] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:24,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885423318] [2022-01-18 06:52:24,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:24,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:24,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:24,892 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) [2022-01-18 06:52:24,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-01-18 06:52:24,913 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-01-18 06:52:24,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:24,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:25,011 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:25,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:25,076 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:25,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885423318] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:25,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:25,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:52:25,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888001636] [2022-01-18 06:52:25,076 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:25,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:52:25,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:25,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:52:25,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:52:25,077 INFO L87 Difference]: Start difference. First operand 699 states and 2312 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-01-18 06:52:25,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:25,620 INFO L93 Difference]: Finished difference Result 2256 states and 6789 transitions. [2022-01-18 06:52:25,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:52:25,620 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-01-18 06:52:25,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:25,627 INFO L225 Difference]: With dead ends: 2256 [2022-01-18 06:52:25,627 INFO L226 Difference]: Without dead ends: 2256 [2022-01-18 06:52:25,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=584, Invalid=2068, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 06:52:25,628 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 261 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:25,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 172 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:52:25,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2022-01-18 06:52:25,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 775. [2022-01-18 06:52:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.289405684754522) internal successors, (2546), 774 states have internal predecessors, (2546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:25,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2546 transitions. [2022-01-18 06:52:25,649 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2546 transitions. Word has length 24 [2022-01-18 06:52:25,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:25,650 INFO L470 AbstractCegarLoop]: Abstraction has 775 states and 2546 transitions. [2022-01-18 06:52:25,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-01-18 06:52:25,650 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2546 transitions. [2022-01-18 06:52:25,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:25,652 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:25,652 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] [2022-01-18 06:52:25,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:25,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:25,868 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:25,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:25,868 INFO L85 PathProgramCache]: Analyzing trace with hash 186144540, now seen corresponding path program 13 times [2022-01-18 06:52:25,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:25,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184071946] [2022-01-18 06:52:25,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:25,869 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:25,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:25,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:25,919 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:25,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184071946] [2022-01-18 06:52:25,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184071946] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:25,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976349628] [2022-01-18 06:52:25,919 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:52:25,919 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:25,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:25,920 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) [2022-01-18 06:52:25,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-01-18 06:52:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:25,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:25,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:26,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:26,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976349628] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:26,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:26,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2022-01-18 06:52:26,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18008915] [2022-01-18 06:52:26,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:26,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:52:26,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:52:26,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:52:26,059 INFO L87 Difference]: Start difference. First operand 775 states and 2546 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2022-01-18 06:52:26,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:26,388 INFO L93 Difference]: Finished difference Result 1611 states and 5005 transitions. [2022-01-18 06:52:26,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-18 06:52:26,388 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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 24 [2022-01-18 06:52:26,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:26,396 INFO L225 Difference]: With dead ends: 1611 [2022-01-18 06:52:26,396 INFO L226 Difference]: Without dead ends: 1611 [2022-01-18 06:52:26,396 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:52:26,397 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 180 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:26,397 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 169 Invalid, 494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:52:26,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2022-01-18 06:52:26,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 926. [2022-01-18 06:52:26,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 926 states, 925 states have (on average 3.370810810810811) internal successors, (3118), 925 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:26,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 926 states to 926 states and 3118 transitions. [2022-01-18 06:52:26,416 INFO L78 Accepts]: Start accepts. Automaton has 926 states and 3118 transitions. Word has length 24 [2022-01-18 06:52:26,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:26,417 INFO L470 AbstractCegarLoop]: Abstraction has 926 states and 3118 transitions. [2022-01-18 06:52:26,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 13 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) [2022-01-18 06:52:26,417 INFO L276 IsEmpty]: Start isEmpty. Operand 926 states and 3118 transitions. [2022-01-18 06:52:26,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:26,419 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:26,419 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] [2022-01-18 06:52:26,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:26,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-01-18 06:52:26,635 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:26,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:26,636 INFO L85 PathProgramCache]: Analyzing trace with hash -246732064, now seen corresponding path program 14 times [2022-01-18 06:52:26,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:26,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923145617] [2022-01-18 06:52:26,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:26,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:26,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:26,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:26,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923145617] [2022-01-18 06:52:26,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923145617] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:26,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377080002] [2022-01-18 06:52:26,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:26,670 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:26,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:26,671 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) [2022-01-18 06:52:26,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-01-18 06:52:26,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:26,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:26,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:26,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:26,750 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:26,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:26,809 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:26,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377080002] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:26,809 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:26,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:52:26,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937141955] [2022-01-18 06:52:26,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:26,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:52:26,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:26,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:52:26,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:52:26,810 INFO L87 Difference]: Start difference. First operand 926 states and 3118 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-01-18 06:52:27,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:27,290 INFO L93 Difference]: Finished difference Result 2408 states and 7521 transitions. [2022-01-18 06:52:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-18 06:52:27,290 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 24 [2022-01-18 06:52:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:27,296 INFO L225 Difference]: With dead ends: 2408 [2022-01-18 06:52:27,296 INFO L226 Difference]: Without dead ends: 2404 [2022-01-18 06:52:27,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:52:27,297 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 237 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 586 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:27,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 170 Invalid, 639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 586 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:52:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2404 states. [2022-01-18 06:52:27,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2404 to 934. [2022-01-18 06:52:27,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 3.356913183279743) internal successors, (3132), 933 states have internal predecessors, (3132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:27,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 3132 transitions. [2022-01-18 06:52:27,326 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 3132 transitions. Word has length 24 [2022-01-18 06:52:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:27,326 INFO L470 AbstractCegarLoop]: Abstraction has 934 states and 3132 transitions. [2022-01-18 06:52:27,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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) [2022-01-18 06:52:27,326 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 3132 transitions. [2022-01-18 06:52:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:27,328 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:27,328 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] [2022-01-18 06:52:27,344 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:27,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:27,545 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:27,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:27,545 INFO L85 PathProgramCache]: Analyzing trace with hash -112101728, now seen corresponding path program 15 times [2022-01-18 06:52:27,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:27,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743729640] [2022-01-18 06:52:27,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:27,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:27,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:27,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:27,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743729640] [2022-01-18 06:52:27,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743729640] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:27,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659793261] [2022-01-18 06:52:27,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:27,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:27,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:27,579 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) [2022-01-18 06:52:27,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-01-18 06:52:27,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:52:27,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:27,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:27,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:27,696 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:27,696 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:27,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659793261] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:27,777 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:27,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:52:27,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100363218] [2022-01-18 06:52:27,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:27,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:52:27,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:27,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:52:27,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:52:27,778 INFO L87 Difference]: Start difference. First operand 934 states and 3132 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:28,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:28,640 INFO L93 Difference]: Finished difference Result 3509 states and 10311 transitions. [2022-01-18 06:52:28,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 06:52:28,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:28,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:28,650 INFO L225 Difference]: With dead ends: 3509 [2022-01-18 06:52:28,651 INFO L226 Difference]: Without dead ends: 3509 [2022-01-18 06:52:28,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1536 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1091, Invalid=3199, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 06:52:28,652 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 508 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 749 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:28,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 238 Invalid, 749 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:52:28,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3509 states. [2022-01-18 06:52:28,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3509 to 985. [2022-01-18 06:52:28,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.399390243902439) internal successors, (3345), 984 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3345 transitions. [2022-01-18 06:52:28,697 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3345 transitions. Word has length 24 [2022-01-18 06:52:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:28,698 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3345 transitions. [2022-01-18 06:52:28,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:28,698 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3345 transitions. [2022-01-18 06:52:28,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:28,699 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:28,699 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] [2022-01-18 06:52:28,732 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:28,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:28,914 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:28,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1530937426, now seen corresponding path program 16 times [2022-01-18 06:52:28,915 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:28,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655980290] [2022-01-18 06:52:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:28,915 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:28,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:28,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:28,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:28,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655980290] [2022-01-18 06:52:28,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655980290] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:28,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336820672] [2022-01-18 06:52:28,963 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:28,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:28,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:28,964 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) [2022-01-18 06:52:28,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-01-18 06:52:28,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:28,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:28,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:28,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:29,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:29,147 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:29,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336820672] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:29,147 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:29,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:52:29,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247397906] [2022-01-18 06:52:29,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:29,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:52:29,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:29,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:52:29,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:52:29,148 INFO L87 Difference]: Start difference. First operand 985 states and 3345 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:30,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:30,303 INFO L93 Difference]: Finished difference Result 3211 states and 9686 transitions. [2022-01-18 06:52:30,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-18 06:52:30,304 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:30,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:30,313 INFO L225 Difference]: With dead ends: 3211 [2022-01-18 06:52:30,314 INFO L226 Difference]: Without dead ends: 3207 [2022-01-18 06:52:30,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1498, Invalid=5144, Unknown=0, NotChecked=0, Total=6642 [2022-01-18 06:52:30,316 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 482 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 1073 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:30,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 284 Invalid, 1073 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-18 06:52:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3207 states. [2022-01-18 06:52:30,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3207 to 985. [2022-01-18 06:52:30,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 985 states, 984 states have (on average 3.397357723577236) internal successors, (3343), 984 states have internal predecessors, (3343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:30,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 985 states to 985 states and 3343 transitions. [2022-01-18 06:52:30,358 INFO L78 Accepts]: Start accepts. Automaton has 985 states and 3343 transitions. Word has length 24 [2022-01-18 06:52:30,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:30,358 INFO L470 AbstractCegarLoop]: Abstraction has 985 states and 3343 transitions. [2022-01-18 06:52:30,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:30,359 INFO L276 IsEmpty]: Start isEmpty. Operand 985 states and 3343 transitions. [2022-01-18 06:52:30,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:30,361 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:30,361 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] [2022-01-18 06:52:30,385 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:30,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:30,584 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:30,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:30,584 INFO L85 PathProgramCache]: Analyzing trace with hash 618651874, now seen corresponding path program 3 times [2022-01-18 06:52:30,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:30,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705727113] [2022-01-18 06:52:30,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:30,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:30,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:30,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:30,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705727113] [2022-01-18 06:52:30,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705727113] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:30,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670848779] [2022-01-18 06:52:30,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:30,613 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:30,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:30,614 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) [2022-01-18 06:52:30,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-01-18 06:52:30,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-01-18 06:52:30,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:30,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2022-01-18 06:52:30,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:30,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:30,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:30,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:30,763 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670848779] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:30,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:30,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 9 [2022-01-18 06:52:30,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729802192] [2022-01-18 06:52:30,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:30,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-18 06:52:30,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:30,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-18 06:52:30,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2022-01-18 06:52:30,764 INFO L87 Difference]: Start difference. First operand 985 states and 3343 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2022-01-18 06:52:30,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:30,880 INFO L93 Difference]: Finished difference Result 1333 states and 4297 transitions. [2022-01-18 06:52:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-18 06:52:30,880 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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 24 [2022-01-18 06:52:30,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:30,883 INFO L225 Difference]: With dead ends: 1333 [2022-01-18 06:52:30,883 INFO L226 Difference]: Without dead ends: 1333 [2022-01-18 06:52:30,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:52:30,883 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 99 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:30,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 57 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:52:30,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1333 states. [2022-01-18 06:52:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1333 to 937. [2022-01-18 06:52:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.378205128205128) internal successors, (3162), 936 states have internal predecessors, (3162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3162 transitions. [2022-01-18 06:52:30,900 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3162 transitions. Word has length 24 [2022-01-18 06:52:30,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:30,900 INFO L470 AbstractCegarLoop]: Abstraction has 937 states and 3162 transitions. [2022-01-18 06:52:30,900 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 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) [2022-01-18 06:52:30,900 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3162 transitions. [2022-01-18 06:52:30,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:30,902 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:30,902 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] [2022-01-18 06:52:30,921 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:31,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:31,118 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:31,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:31,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1548851618, now seen corresponding path program 17 times [2022-01-18 06:52:31,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:31,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400006983] [2022-01-18 06:52:31,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:31,118 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:31,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:31,167 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:31,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:31,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400006983] [2022-01-18 06:52:31,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400006983] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:31,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108675817] [2022-01-18 06:52:31,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:31,167 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:31,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:31,168 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) [2022-01-18 06:52:31,190 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-01-18 06:52:31,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:31,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:31,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:31,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:31,317 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:31,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108675817] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:31,317 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:31,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 06:52:31,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828514598] [2022-01-18 06:52:31,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:31,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:52:31,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:31,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:52:31,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:52:31,318 INFO L87 Difference]: Start difference. First operand 937 states and 3162 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-01-18 06:52:31,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:31,629 INFO L93 Difference]: Finished difference Result 2129 states and 6669 transitions. [2022-01-18 06:52:31,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-18 06:52:31,629 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-01-18 06:52:31,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:31,634 INFO L225 Difference]: With dead ends: 2129 [2022-01-18 06:52:31,634 INFO L226 Difference]: Without dead ends: 2129 [2022-01-18 06:52:31,634 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=282, Invalid=774, Unknown=0, NotChecked=0, Total=1056 [2022-01-18 06:52:31,635 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 158 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:31,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 138 Invalid, 405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:52:31,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2129 states. [2022-01-18 06:52:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2129 to 1003. [2022-01-18 06:52:31,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 3.3642714570858283) internal successors, (3371), 1002 states have internal predecessors, (3371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:31,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 3371 transitions. [2022-01-18 06:52:31,657 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 3371 transitions. Word has length 24 [2022-01-18 06:52:31,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:31,657 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 3371 transitions. [2022-01-18 06:52:31,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-01-18 06:52:31,657 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 3371 transitions. [2022-01-18 06:52:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:31,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:31,659 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] [2022-01-18 06:52:31,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:31,874 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,SelfDestructingSolverStorable22 [2022-01-18 06:52:31,875 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:31,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:31,875 INFO L85 PathProgramCache]: Analyzing trace with hash -843436226, now seen corresponding path program 18 times [2022-01-18 06:52:31,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:31,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731565228] [2022-01-18 06:52:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:31,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:31,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:31,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:31,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:31,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731565228] [2022-01-18 06:52:31,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731565228] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:31,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853320165] [2022-01-18 06:52:31,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:31,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:31,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:31,907 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) [2022-01-18 06:52:31,909 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-01-18 06:52:31,930 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:52:31,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:31,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:31,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:31,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:32,033 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:32,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1853320165] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:32,034 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:32,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 06:52:32,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569059356] [2022-01-18 06:52:32,034 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:32,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:52:32,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:32,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:52:32,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:52:32,034 INFO L87 Difference]: Start difference. First operand 1003 states and 3371 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-01-18 06:52:32,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:32,394 INFO L93 Difference]: Finished difference Result 2262 states and 7067 transitions. [2022-01-18 06:52:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-18 06:52:32,395 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-01-18 06:52:32,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:32,416 INFO L225 Difference]: With dead ends: 2262 [2022-01-18 06:52:32,416 INFO L226 Difference]: Without dead ends: 2262 [2022-01-18 06:52:32,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=893, Unknown=0, NotChecked=0, Total=1190 [2022-01-18 06:52:32,417 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 193 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:32,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 123 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:52:32,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-01-18 06:52:32,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1073. [2022-01-18 06:52:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1073 states, 1072 states have (on average 3.3563432835820897) internal successors, (3598), 1072 states have internal predecessors, (3598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1073 states to 1073 states and 3598 transitions. [2022-01-18 06:52:32,473 INFO L78 Accepts]: Start accepts. Automaton has 1073 states and 3598 transitions. Word has length 24 [2022-01-18 06:52:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:32,473 INFO L470 AbstractCegarLoop]: Abstraction has 1073 states and 3598 transitions. [2022-01-18 06:52:32,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-01-18 06:52:32,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1073 states and 3598 transitions. [2022-01-18 06:52:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:32,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:32,475 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] [2022-01-18 06:52:32,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:32,691 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,SelfDestructingSolverStorable23 [2022-01-18 06:52:32,691 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:32,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:32,691 INFO L85 PathProgramCache]: Analyzing trace with hash -1926458882, now seen corresponding path program 19 times [2022-01-18 06:52:32,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:32,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834235281] [2022-01-18 06:52:32,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:32,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:32,727 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:32,727 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:32,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834235281] [2022-01-18 06:52:32,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834235281] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:32,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57217702] [2022-01-18 06:52:32,728 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:52:32,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:32,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:32,729 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) [2022-01-18 06:52:32,729 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-01-18 06:52:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:32,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:32,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:32,841 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:32,842 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:32,884 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:32,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57217702] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:32,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:32,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 14 [2022-01-18 06:52:32,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744672160] [2022-01-18 06:52:32,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:32,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:52:32,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:32,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:52:32,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:52:32,886 INFO L87 Difference]: Start difference. First operand 1073 states and 3598 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-01-18 06:52:33,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:33,127 INFO L93 Difference]: Finished difference Result 1474 states and 4766 transitions. [2022-01-18 06:52:33,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-18 06:52:33,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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 24 [2022-01-18 06:52:33,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:33,130 INFO L225 Difference]: With dead ends: 1474 [2022-01-18 06:52:33,130 INFO L226 Difference]: Without dead ends: 1464 [2022-01-18 06:52:33,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=572, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:52:33,131 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 160 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 424 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:33,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 132 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 424 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:52:33,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1464 states. [2022-01-18 06:52:33,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1464 to 1140. [2022-01-18 06:52:33,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.395961369622476) internal successors, (3868), 1139 states have internal predecessors, (3868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3868 transitions. [2022-01-18 06:52:33,150 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3868 transitions. Word has length 24 [2022-01-18 06:52:33,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:33,150 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3868 transitions. [2022-01-18 06:52:33,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 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) [2022-01-18 06:52:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3868 transitions. [2022-01-18 06:52:33,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:33,152 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:33,152 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] [2022-01-18 06:52:33,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:33,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:33,368 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:33,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:33,369 INFO L85 PathProgramCache]: Analyzing trace with hash -888257368, now seen corresponding path program 20 times [2022-01-18 06:52:33,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:33,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818755940] [2022-01-18 06:52:33,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:33,369 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:33,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:33,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818755940] [2022-01-18 06:52:33,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818755940] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:33,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964104904] [2022-01-18 06:52:33,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:33,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:33,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:33,394 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) [2022-01-18 06:52:33,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-01-18 06:52:33,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:33,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:33,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:33,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:33,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:33,521 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:33,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964104904] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:33,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:33,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2022-01-18 06:52:33,522 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083824509] [2022-01-18 06:52:33,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:33,522 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-18 06:52:33,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:33,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-18 06:52:33,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-01-18 06:52:33,522 INFO L87 Difference]: Start difference. First operand 1140 states and 3868 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-01-18 06:52:33,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:33,782 INFO L93 Difference]: Finished difference Result 2318 states and 7414 transitions. [2022-01-18 06:52:33,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-18 06:52:33,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 24 [2022-01-18 06:52:33,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:33,787 INFO L225 Difference]: With dead ends: 2318 [2022-01-18 06:52:33,787 INFO L226 Difference]: Without dead ends: 2314 [2022-01-18 06:52:33,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=566, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:52:33,788 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 184 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:33,789 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [184 Valid, 114 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:52:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2314 states. [2022-01-18 06:52:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2314 to 1140. [2022-01-18 06:52:33,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1140 states, 1139 states have (on average 3.394205443371378) internal successors, (3866), 1139 states have internal predecessors, (3866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:33,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1140 states to 1140 states and 3866 transitions. [2022-01-18 06:52:33,815 INFO L78 Accepts]: Start accepts. Automaton has 1140 states and 3866 transitions. Word has length 24 [2022-01-18 06:52:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:33,815 INFO L470 AbstractCegarLoop]: Abstraction has 1140 states and 3866 transitions. [2022-01-18 06:52:33,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2022-01-18 06:52:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1140 states and 3866 transitions. [2022-01-18 06:52:33,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:33,817 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:33,817 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] [2022-01-18 06:52:33,849 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:34,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:34,031 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:34,032 INFO L85 PathProgramCache]: Analyzing trace with hash -290920710, now seen corresponding path program 21 times [2022-01-18 06:52:34,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:34,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828614564] [2022-01-18 06:52:34,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:34,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:34,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:34,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828614564] [2022-01-18 06:52:34,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828614564] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:34,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629420204] [2022-01-18 06:52:34,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:34,064 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:34,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:34,065 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) [2022-01-18 06:52:34,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-01-18 06:52:34,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:52:34,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:34,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:34,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:34,132 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:34,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:34,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629420204] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:34,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:34,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2022-01-18 06:52:34,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769984706] [2022-01-18 06:52:34,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:34,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-18 06:52:34,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:34,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-18 06:52:34,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-01-18 06:52:34,182 INFO L87 Difference]: Start difference. First operand 1140 states and 3866 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-01-18 06:52:34,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:34,456 INFO L93 Difference]: Finished difference Result 2302 states and 7376 transitions. [2022-01-18 06:52:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-18 06:52:34,456 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 24 [2022-01-18 06:52:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:34,461 INFO L225 Difference]: With dead ends: 2302 [2022-01-18 06:52:34,461 INFO L226 Difference]: Without dead ends: 2290 [2022-01-18 06:52:34,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=223, Invalid=707, Unknown=0, NotChecked=0, Total=930 [2022-01-18 06:52:34,462 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 187 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:34,462 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 134 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 331 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-18 06:52:34,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2290 states. [2022-01-18 06:52:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2290 to 1148. [2022-01-18 06:52:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1148 states, 1147 states have (on average 3.3844812554489976) internal successors, (3882), 1147 states have internal predecessors, (3882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:34,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1148 states to 1148 states and 3882 transitions. [2022-01-18 06:52:34,487 INFO L78 Accepts]: Start accepts. Automaton has 1148 states and 3882 transitions. Word has length 24 [2022-01-18 06:52:34,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:34,487 INFO L470 AbstractCegarLoop]: Abstraction has 1148 states and 3882 transitions. [2022-01-18 06:52:34,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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) [2022-01-18 06:52:34,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1148 states and 3882 transitions. [2022-01-18 06:52:34,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:34,489 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:34,489 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] [2022-01-18 06:52:34,505 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:34,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-01-18 06:52:34,705 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:34,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:34,705 INFO L85 PathProgramCache]: Analyzing trace with hash -817340994, now seen corresponding path program 22 times [2022-01-18 06:52:34,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:34,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265190997] [2022-01-18 06:52:34,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:34,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:34,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:34,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:34,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265190997] [2022-01-18 06:52:34,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265190997] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:34,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39600019] [2022-01-18 06:52:34,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:34,742 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:34,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:34,743 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) [2022-01-18 06:52:34,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-01-18 06:52:34,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:34,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:34,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:34,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:34,845 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:34,845 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:34,922 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:34,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39600019] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:34,922 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:34,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:52:34,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022914606] [2022-01-18 06:52:34,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:34,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:52:34,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:34,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:52:34,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:52:34,923 INFO L87 Difference]: Start difference. First operand 1148 states and 3882 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:35,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:35,738 INFO L93 Difference]: Finished difference Result 4760 states and 15112 transitions. [2022-01-18 06:52:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-18 06:52:35,738 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:52:35,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:35,748 INFO L225 Difference]: With dead ends: 4760 [2022-01-18 06:52:35,748 INFO L226 Difference]: Without dead ends: 4760 [2022-01-18 06:52:35,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=926, Invalid=2734, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:52:35,749 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 334 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 786 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:35,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 237 Invalid, 845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 786 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:35,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4760 states. [2022-01-18 06:52:35,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4760 to 1429. [2022-01-18 06:52:35,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1429 states, 1428 states have (on average 3.589635854341737) internal successors, (5126), 1428 states have internal predecessors, (5126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1429 states to 1429 states and 5126 transitions. [2022-01-18 06:52:35,792 INFO L78 Accepts]: Start accepts. Automaton has 1429 states and 5126 transitions. Word has length 24 [2022-01-18 06:52:35,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:35,792 INFO L470 AbstractCegarLoop]: Abstraction has 1429 states and 5126 transitions. [2022-01-18 06:52:35,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:35,793 INFO L276 IsEmpty]: Start isEmpty. Operand 1429 states and 5126 transitions. [2022-01-18 06:52:35,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:35,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:35,795 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] [2022-01-18 06:52:35,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:36,010 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,SelfDestructingSolverStorable27 [2022-01-18 06:52:36,010 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:36,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:36,011 INFO L85 PathProgramCache]: Analyzing trace with hash -250388914, now seen corresponding path program 23 times [2022-01-18 06:52:36,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:36,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114640148] [2022-01-18 06:52:36,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:36,011 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:36,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:36,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114640148] [2022-01-18 06:52:36,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114640148] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:36,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949389494] [2022-01-18 06:52:36,061 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:36,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:36,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:36,062 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) [2022-01-18 06:52:36,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-01-18 06:52:36,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:36,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:36,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:36,164 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:36,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:36,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:36,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949389494] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:36,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:36,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:52:36,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060043260] [2022-01-18 06:52:36,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:36,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:52:36,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:52:36,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:52:36,243 INFO L87 Difference]: Start difference. First operand 1429 states and 5126 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:36,934 INFO L93 Difference]: Finished difference Result 4260 states and 13532 transitions. [2022-01-18 06:52:36,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:52:36,934 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:52:36,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:36,942 INFO L225 Difference]: With dead ends: 4260 [2022-01-18 06:52:36,942 INFO L226 Difference]: Without dead ends: 4260 [2022-01-18 06:52:36,943 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=860, Invalid=2220, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 06:52:36,944 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 379 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:36,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 198 Invalid, 714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:36,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4260 states. [2022-01-18 06:52:36,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4260 to 1426. [2022-01-18 06:52:36,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1426 states, 1425 states have (on average 3.5873684210526315) internal successors, (5112), 1425 states have internal predecessors, (5112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:36,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1426 states to 1426 states and 5112 transitions. [2022-01-18 06:52:37,000 INFO L78 Accepts]: Start accepts. Automaton has 1426 states and 5112 transitions. Word has length 24 [2022-01-18 06:52:37,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:37,000 INFO L470 AbstractCegarLoop]: Abstraction has 1426 states and 5112 transitions. [2022-01-18 06:52:37,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:37,000 INFO L276 IsEmpty]: Start isEmpty. Operand 1426 states and 5112 transitions. [2022-01-18 06:52:37,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:37,002 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:37,002 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] [2022-01-18 06:52:37,018 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2022-01-18 06:52:37,204 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,SelfDestructingSolverStorable28 [2022-01-18 06:52:37,204 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:37,205 INFO L85 PathProgramCache]: Analyzing trace with hash -1422734772, now seen corresponding path program 24 times [2022-01-18 06:52:37,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:37,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579321246] [2022-01-18 06:52:37,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:37,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:37,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:37,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:37,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579321246] [2022-01-18 06:52:37,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579321246] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:37,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623615698] [2022-01-18 06:52:37,244 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:37,244 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:37,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:37,245 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) [2022-01-18 06:52:37,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-01-18 06:52:37,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:52:37,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:37,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:37,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:37,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:37,422 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:37,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623615698] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:37,423 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:37,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 06:52:37,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561041143] [2022-01-18 06:52:37,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:37,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:52:37,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:37,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:52:37,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:52:37,424 INFO L87 Difference]: Start difference. First operand 1426 states and 5112 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 06:52:38,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:38,050 INFO L93 Difference]: Finished difference Result 4602 states and 14473 transitions. [2022-01-18 06:52:38,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 06:52:38,050 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-01-18 06:52:38,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:38,058 INFO L225 Difference]: With dead ends: 4602 [2022-01-18 06:52:38,058 INFO L226 Difference]: Without dead ends: 4602 [2022-01-18 06:52:38,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 875 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-01-18 06:52:38,059 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 280 mSDsluCounter, 355 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:38,059 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 216 Invalid, 744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:38,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4602 states. [2022-01-18 06:52:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4602 to 1436. [2022-01-18 06:52:38,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.592334494773519) internal successors, (5155), 1435 states have internal predecessors, (5155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:38,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5155 transitions. [2022-01-18 06:52:38,098 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5155 transitions. Word has length 24 [2022-01-18 06:52:38,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:38,098 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5155 transitions. [2022-01-18 06:52:38,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 06:52:38,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5155 transitions. [2022-01-18 06:52:38,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:38,100 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:38,101 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] [2022-01-18 06:52:38,118 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:38,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:38,311 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:38,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:38,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1341358684, now seen corresponding path program 25 times [2022-01-18 06:52:38,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:38,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923589829] [2022-01-18 06:52:38,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:38,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:38,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:38,347 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:38,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:38,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923589829] [2022-01-18 06:52:38,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923589829] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:38,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302966400] [2022-01-18 06:52:38,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:52:38,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:38,348 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:38,349 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) [2022-01-18 06:52:38,350 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-01-18 06:52:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:38,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:38,435 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:38,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:38,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:38,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302966400] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:38,497 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:38,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 14 [2022-01-18 06:52:38,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5617602] [2022-01-18 06:52:38,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:38,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-18 06:52:38,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:38,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-18 06:52:38,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-01-18 06:52:38,498 INFO L87 Difference]: Start difference. First operand 1436 states and 5155 transitions. Second operand has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 06:52:39,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:39,045 INFO L93 Difference]: Finished difference Result 4348 states and 13871 transitions. [2022-01-18 06:52:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:52:39,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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 24 [2022-01-18 06:52:39,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:39,053 INFO L225 Difference]: With dead ends: 4348 [2022-01-18 06:52:39,053 INFO L226 Difference]: Without dead ends: 4344 [2022-01-18 06:52:39,053 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=514, Invalid=1466, Unknown=0, NotChecked=0, Total=1980 [2022-01-18 06:52:39,054 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 410 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:39,054 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [410 Valid, 167 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2022-01-18 06:52:39,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 1436. [2022-01-18 06:52:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:39,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 06:52:39,095 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 06:52:39,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:39,096 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 06:52:39,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0714285714285716) internal successors, (43), 14 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) [2022-01-18 06:52:39,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 06:52:39,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:39,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:39,098 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] [2022-01-18 06:52:39,115 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:39,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:39,311 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:39,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:39,312 INFO L85 PathProgramCache]: Analyzing trace with hash -410701468, now seen corresponding path program 26 times [2022-01-18 06:52:39,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:39,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650687180] [2022-01-18 06:52:39,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:39,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:39,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:39,365 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:39,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:39,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650687180] [2022-01-18 06:52:39,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650687180] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:39,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396764995] [2022-01-18 06:52:39,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:39,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:39,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:39,367 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) [2022-01-18 06:52:39,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-01-18 06:52:39,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:39,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:39,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:39,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:39,488 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:39,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:39,566 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:39,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396764995] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:39,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:39,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:52:39,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838494026] [2022-01-18 06:52:39,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:39,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:52:39,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:39,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:52:39,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:52:39,567 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:40,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:40,153 INFO L93 Difference]: Finished difference Result 4035 states and 12669 transitions. [2022-01-18 06:52:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 06:52:40,154 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:40,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:40,162 INFO L225 Difference]: With dead ends: 4035 [2022-01-18 06:52:40,163 INFO L226 Difference]: Without dead ends: 4035 [2022-01-18 06:52:40,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=640, Invalid=1616, Unknown=0, NotChecked=0, Total=2256 [2022-01-18 06:52:40,163 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 436 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 572 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 572 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:40,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 228 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 572 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:40,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4035 states. [2022-01-18 06:52:40,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4035 to 1442. [2022-01-18 06:52:40,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1442 states, 1441 states have (on average 3.5933379597501736) internal successors, (5178), 1441 states have internal predecessors, (5178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:40,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 5178 transitions. [2022-01-18 06:52:40,204 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 5178 transitions. Word has length 24 [2022-01-18 06:52:40,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:40,204 INFO L470 AbstractCegarLoop]: Abstraction has 1442 states and 5178 transitions. [2022-01-18 06:52:40,204 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:40,204 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 5178 transitions. [2022-01-18 06:52:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:40,207 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:40,207 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] [2022-01-18 06:52:40,227 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-01-18 06:52:40,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:40,407 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1232337686, now seen corresponding path program 27 times [2022-01-18 06:52:40,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:40,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21513923] [2022-01-18 06:52:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:40,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:40,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:40,449 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:40,449 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21513923] [2022-01-18 06:52:40,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21513923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:40,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807630366] [2022-01-18 06:52:40,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:40,450 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:40,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:40,451 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) [2022-01-18 06:52:40,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-01-18 06:52:40,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:52:40,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:40,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:40,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:40,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:40,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-18 06:52:40,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807630366] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:40,628 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:40,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 16 [2022-01-18 06:52:40,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810176766] [2022-01-18 06:52:40,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:40,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-18 06:52:40,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:40,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-18 06:52:40,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2022-01-18 06:52:40,629 INFO L87 Difference]: Start difference. First operand 1442 states and 5178 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:41,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:41,381 INFO L93 Difference]: Finished difference Result 3794 states and 12201 transitions. [2022-01-18 06:52:41,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:52:41,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:41,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:41,389 INFO L225 Difference]: With dead ends: 3794 [2022-01-18 06:52:41,389 INFO L226 Difference]: Without dead ends: 3790 [2022-01-18 06:52:41,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1026 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=800, Invalid=2392, Unknown=0, NotChecked=0, Total=3192 [2022-01-18 06:52:41,390 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 360 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:41,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 205 Invalid, 826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:41,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3790 states. [2022-01-18 06:52:41,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3790 to 1436. [2022-01-18 06:52:41,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1436 states, 1435 states have (on average 3.590940766550523) internal successors, (5153), 1435 states have internal predecessors, (5153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:41,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1436 states to 1436 states and 5153 transitions. [2022-01-18 06:52:41,423 INFO L78 Accepts]: Start accepts. Automaton has 1436 states and 5153 transitions. Word has length 24 [2022-01-18 06:52:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:41,423 INFO L470 AbstractCegarLoop]: Abstraction has 1436 states and 5153 transitions. [2022-01-18 06:52:41,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 1436 states and 5153 transitions. [2022-01-18 06:52:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:41,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:41,426 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] [2022-01-18 06:52:41,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:41,639 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,SelfDestructingSolverStorable32 [2022-01-18 06:52:41,639 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:41,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:41,640 INFO L85 PathProgramCache]: Analyzing trace with hash -2059201626, now seen corresponding path program 28 times [2022-01-18 06:52:41,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:41,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858799216] [2022-01-18 06:52:41,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:41,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:41,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:41,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:41,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:41,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858799216] [2022-01-18 06:52:41,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858799216] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:41,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851062035] [2022-01-18 06:52:41,684 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:41,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:41,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:41,685 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) [2022-01-18 06:52:41,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-01-18 06:52:41,704 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:41,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:41,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:41,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:41,765 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:41,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:41,822 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:41,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1851062035] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:41,822 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:41,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:52:41,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108614755] [2022-01-18 06:52:41,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:41,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:52:41,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:52:41,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:52:41,823 INFO L87 Difference]: Start difference. First operand 1436 states and 5153 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:42,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:42,512 INFO L93 Difference]: Finished difference Result 3978 states and 12923 transitions. [2022-01-18 06:52:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:52:42,512 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:52:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:42,522 INFO L225 Difference]: With dead ends: 3978 [2022-01-18 06:52:42,522 INFO L226 Difference]: Without dead ends: 3978 [2022-01-18 06:52:42,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=699, Invalid=2271, Unknown=0, NotChecked=0, Total=2970 [2022-01-18 06:52:42,523 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 239 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:42,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [239 Valid, 200 Invalid, 607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:42,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3978 states. [2022-01-18 06:52:42,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3978 to 1585. [2022-01-18 06:52:42,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1585 states, 1584 states have (on average 3.591540404040404) internal successors, (5689), 1584 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:42,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1585 states to 1585 states and 5689 transitions. [2022-01-18 06:52:42,573 INFO L78 Accepts]: Start accepts. Automaton has 1585 states and 5689 transitions. Word has length 24 [2022-01-18 06:52:42,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:42,574 INFO L470 AbstractCegarLoop]: Abstraction has 1585 states and 5689 transitions. [2022-01-18 06:52:42,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:42,574 INFO L276 IsEmpty]: Start isEmpty. Operand 1585 states and 5689 transitions. [2022-01-18 06:52:42,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:42,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:42,585 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] [2022-01-18 06:52:42,602 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:42,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:42,802 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:42,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:42,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1977825538, now seen corresponding path program 29 times [2022-01-18 06:52:42,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:42,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484296646] [2022-01-18 06:52:42,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:42,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:42,837 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:42,837 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:42,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484296646] [2022-01-18 06:52:42,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484296646] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:42,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192472903] [2022-01-18 06:52:42,837 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:52:42,838 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:42,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:42,839 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) [2022-01-18 06:52:42,839 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-01-18 06:52:42,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:52:42,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:42,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:42,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:42,920 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:42,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:42,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:42,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192472903] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:42,988 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:42,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:52:42,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940324172] [2022-01-18 06:52:42,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:42,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:52:42,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:42,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:52:42,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:52:42,988 INFO L87 Difference]: Start difference. First operand 1585 states and 5689 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:43,503 INFO L93 Difference]: Finished difference Result 3706 states and 12257 transitions. [2022-01-18 06:52:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-18 06:52:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:52:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:43,511 INFO L225 Difference]: With dead ends: 3706 [2022-01-18 06:52:43,511 INFO L226 Difference]: Without dead ends: 3702 [2022-01-18 06:52:43,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 558 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=457, Invalid=1435, Unknown=0, NotChecked=0, Total=1892 [2022-01-18 06:52:43,512 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 286 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:43,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 143 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:52:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3702 states. [2022-01-18 06:52:43,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3702 to 1575. [2022-01-18 06:52:43,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1575 states, 1574 states have (on average 3.5870393900889455) internal successors, (5646), 1574 states have internal predecessors, (5646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:43,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1575 states to 1575 states and 5646 transitions. [2022-01-18 06:52:43,554 INFO L78 Accepts]: Start accepts. Automaton has 1575 states and 5646 transitions. Word has length 24 [2022-01-18 06:52:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:43,554 INFO L470 AbstractCegarLoop]: Abstraction has 1575 states and 5646 transitions. [2022-01-18 06:52:43,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 1575 states and 5646 transitions. [2022-01-18 06:52:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:43,557 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:43,557 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] [2022-01-18 06:52:43,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:43,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:43,771 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:43,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:43,772 INFO L85 PathProgramCache]: Analyzing trace with hash 802049786, now seen corresponding path program 30 times [2022-01-18 06:52:43,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:43,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698785923] [2022-01-18 06:52:43,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:43,772 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:43,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:43,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698785923] [2022-01-18 06:52:43,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698785923] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:43,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972442946] [2022-01-18 06:52:43,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:52:43,807 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:43,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:43,808 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) [2022-01-18 06:52:43,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-01-18 06:52:43,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:52:43,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:43,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:43,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:43,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972442946] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:43,964 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:43,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-01-18 06:52:43,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889518204] [2022-01-18 06:52:43,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:43,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-18 06:52:43,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:43,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-18 06:52:43,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2022-01-18 06:52:43,965 INFO L87 Difference]: Start difference. First operand 1575 states and 5646 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:44,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:44,540 INFO L93 Difference]: Finished difference Result 4114 states and 13193 transitions. [2022-01-18 06:52:44,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:52:44,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-01-18 06:52:44,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:44,551 INFO L225 Difference]: With dead ends: 4114 [2022-01-18 06:52:44,551 INFO L226 Difference]: Without dead ends: 4102 [2022-01-18 06:52:44,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1676, Unknown=0, NotChecked=0, Total=2162 [2022-01-18 06:52:44,552 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 343 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:44,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 169 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:44,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2022-01-18 06:52:44,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 1595. [2022-01-18 06:52:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1595 states, 1594 states have (on average 3.5884567126725218) internal successors, (5720), 1594 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:44,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1595 states to 1595 states and 5720 transitions. [2022-01-18 06:52:44,645 INFO L78 Accepts]: Start accepts. Automaton has 1595 states and 5720 transitions. Word has length 24 [2022-01-18 06:52:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:44,646 INFO L470 AbstractCegarLoop]: Abstraction has 1595 states and 5720 transitions. [2022-01-18 06:52:44,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:44,646 INFO L276 IsEmpty]: Start isEmpty. Operand 1595 states and 5720 transitions. [2022-01-18 06:52:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:44,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:44,649 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] [2022-01-18 06:52:44,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:44,872 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,SelfDestructingSolverStorable35 [2022-01-18 06:52:44,872 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:44,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:44,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1895790794, now seen corresponding path program 31 times [2022-01-18 06:52:44,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:44,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489179195] [2022-01-18 06:52:44,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:44,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:44,923 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:44,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489179195] [2022-01-18 06:52:44,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489179195] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:44,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135186710] [2022-01-18 06:52:44,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:52:44,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:44,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:44,926 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) [2022-01-18 06:52:44,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-01-18 06:52:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:44,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:44,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:45,035 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:45,116 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:45,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135186710] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:45,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:45,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:52:45,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44383487] [2022-01-18 06:52:45,117 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:45,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:52:45,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:45,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:52:45,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:52:45,118 INFO L87 Difference]: Start difference. First operand 1595 states and 5720 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:45,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:45,683 INFO L93 Difference]: Finished difference Result 3694 states and 11776 transitions. [2022-01-18 06:52:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:52:45,683 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:45,690 INFO L225 Difference]: With dead ends: 3694 [2022-01-18 06:52:45,690 INFO L226 Difference]: Without dead ends: 3694 [2022-01-18 06:52:45,691 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=678, Invalid=1772, Unknown=0, NotChecked=0, Total=2450 [2022-01-18 06:52:45,691 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 402 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:45,691 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 248 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-18 06:52:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3694 states. [2022-01-18 06:52:45,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3694 to 1680. [2022-01-18 06:52:45,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1680 states, 1679 states have (on average 3.5842763549731984) internal successors, (6018), 1679 states have internal predecessors, (6018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:45,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1680 states to 1680 states and 6018 transitions. [2022-01-18 06:52:45,729 INFO L78 Accepts]: Start accepts. Automaton has 1680 states and 6018 transitions. Word has length 24 [2022-01-18 06:52:45,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:45,729 INFO L470 AbstractCegarLoop]: Abstraction has 1680 states and 6018 transitions. [2022-01-18 06:52:45,729 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:45,729 INFO L276 IsEmpty]: Start isEmpty. Operand 1680 states and 6018 transitions. [2022-01-18 06:52:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:45,732 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:45,732 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] [2022-01-18 06:52:45,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-01-18 06:52:45,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-01-18 06:52:45,941 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:45,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:45,941 INFO L85 PathProgramCache]: Analyzing trace with hash -252751640, now seen corresponding path program 32 times [2022-01-18 06:52:45,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:45,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599070111] [2022-01-18 06:52:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:45,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:45,978 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:45,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599070111] [2022-01-18 06:52:45,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599070111] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:45,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326099678] [2022-01-18 06:52:45,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:52:45,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:45,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:45,980 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) [2022-01-18 06:52:45,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-01-18 06:52:46,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:52:46,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:46,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:46,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:46,085 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:46,085 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:46,170 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:46,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326099678] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:46,170 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:46,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2022-01-18 06:52:46,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495349547] [2022-01-18 06:52:46,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:46,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-18 06:52:46,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-18 06:52:46,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2022-01-18 06:52:46,171 INFO L87 Difference]: Start difference. First operand 1680 states and 6018 transitions. Second operand has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:46,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:46,942 INFO L93 Difference]: Finished difference Result 3420 states and 11230 transitions. [2022-01-18 06:52:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-18 06:52:46,942 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have 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 [2022-01-18 06:52:46,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:46,949 INFO L225 Difference]: With dead ends: 3420 [2022-01-18 06:52:46,949 INFO L226 Difference]: Without dead ends: 3416 [2022-01-18 06:52:46,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=880, Invalid=2780, Unknown=0, NotChecked=0, Total=3660 [2022-01-18 06:52:46,949 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 338 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 562 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:46,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 200 Invalid, 641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 562 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:46,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3416 states. [2022-01-18 06:52:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3416 to 1678. [2022-01-18 06:52:46,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1677 states have (on average 3.5819916517590937) internal successors, (6007), 1677 states have internal predecessors, (6007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:46,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 6007 transitions. [2022-01-18 06:52:46,985 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 6007 transitions. Word has length 24 [2022-01-18 06:52:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:46,985 INFO L470 AbstractCegarLoop]: Abstraction has 1678 states and 6007 transitions. [2022-01-18 06:52:46,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.6470588235294117) internal successors, (45), 17 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:46,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 6007 transitions. [2022-01-18 06:52:46,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-18 06:52:46,988 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:46,988 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] [2022-01-18 06:52:47,011 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-01-18 06:52:47,189 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,SelfDestructingSolverStorable37 [2022-01-18 06:52:47,189 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:47,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:47,189 INFO L85 PathProgramCache]: Analyzing trace with hash -1520208818, now seen corresponding path program 33 times [2022-01-18 06:52:47,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:47,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042025033] [2022-01-18 06:52:47,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:47,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:47,227 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:47,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:47,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042025033] [2022-01-18 06:52:47,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042025033] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:47,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041241935] [2022-01-18 06:52:47,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:52:47,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:47,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:47,229 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) [2022-01-18 06:52:47,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-01-18 06:52:47,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:52:47,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:47,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2022-01-18 06:52:47,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:47,315 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:47,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:47,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:47,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041241935] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:47,384 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:47,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2022-01-18 06:52:47,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628182572] [2022-01-18 06:52:47,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:47,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-18 06:52:47,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:47,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-18 06:52:47,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2022-01-18 06:52:47,385 INFO L87 Difference]: Start difference. First operand 1678 states and 6007 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 06:52:48,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:48,002 INFO L93 Difference]: Finished difference Result 3256 states and 10823 transitions. [2022-01-18 06:52:48,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-18 06:52:48,002 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 24 [2022-01-18 06:52:48,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:48,010 INFO L225 Difference]: With dead ends: 3256 [2022-01-18 06:52:48,010 INFO L226 Difference]: Without dead ends: 3244 [2022-01-18 06:52:48,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 748 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2022-01-18 06:52:48,011 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 217 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:48,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 187 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-18 06:52:48,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3244 states. [2022-01-18 06:52:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3244 to 1676. [2022-01-18 06:52:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1676 states, 1675 states have (on average 3.5797014925373136) internal successors, (5996), 1675 states have internal predecessors, (5996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1676 states to 1676 states and 5996 transitions. [2022-01-18 06:52:48,056 INFO L78 Accepts]: Start accepts. Automaton has 1676 states and 5996 transitions. Word has length 24 [2022-01-18 06:52:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:48,056 INFO L470 AbstractCegarLoop]: Abstraction has 1676 states and 5996 transitions. [2022-01-18 06:52:48,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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) [2022-01-18 06:52:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 1676 states and 5996 transitions. [2022-01-18 06:52:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:52:48,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:48,059 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] [2022-01-18 06:52:48,081 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-01-18 06:52:48,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-01-18 06:52:48,260 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash 1154803164, now seen corresponding path program 4 times [2022-01-18 06:52:48,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:48,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304957652] [2022-01-18 06:52:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:48,261 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:48,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:52:48,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:48,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:52:48,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304957652] [2022-01-18 06:52:48,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304957652] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:52:48,820 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090508758] [2022-01-18 06:52:48,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:52:48,820 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:52:48,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:52:48,821 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) [2022-01-18 06:52:48,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-01-18 06:52:48,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:52:48,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:52:48,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 06:52:48,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:52:49,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:52:49,547 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:49,548 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 06:52:49,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:49,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:52:50,825 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:52:50,842 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:52:50,842 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 269 [2022-01-18 06:52:53,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:52:53,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090508758] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:52:53,129 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:52:53,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:52:53,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930970545] [2022-01-18 06:52:53,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:52:53,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:52:53,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:52:53,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:52:53,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=533, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:52:53,129 INFO L87 Difference]: Start difference. First operand 1676 states and 5996 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:59,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:52:59,589 INFO L93 Difference]: Finished difference Result 4132 states and 13160 transitions. [2022-01-18 06:52:59,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:52:59,589 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:52:59,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:52:59,596 INFO L225 Difference]: With dead ends: 4132 [2022-01-18 06:52:59,596 INFO L226 Difference]: Without dead ends: 4072 [2022-01-18 06:52:59,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1657 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=978, Invalid=4134, Unknown=0, NotChecked=0, Total=5112 [2022-01-18 06:52:59,597 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 683 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1149 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 683 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 1302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:52:59,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [683 Valid, 272 Invalid, 1302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1149 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-18 06:52:59,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4072 states. [2022-01-18 06:52:59,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4072 to 1792. [2022-01-18 06:52:59,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1791 states have (on average 3.5907314349525405) internal successors, (6431), 1791 states have internal predecessors, (6431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:59,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 6431 transitions. [2022-01-18 06:52:59,632 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 6431 transitions. Word has length 26 [2022-01-18 06:52:59,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:52:59,632 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 6431 transitions. [2022-01-18 06:52:59,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:52:59,632 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 6431 transitions. [2022-01-18 06:52:59,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:52:59,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:52:59,635 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] [2022-01-18 06:52:59,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-01-18 06:52:59,843 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,SelfDestructingSolverStorable39 [2022-01-18 06:52:59,843 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:52:59,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:52:59,844 INFO L85 PathProgramCache]: Analyzing trace with hash -873594852, now seen corresponding path program 5 times [2022-01-18 06:52:59,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:52:59,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586480900] [2022-01-18 06:52:59,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:52:59,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:52:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:00,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:00,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586480900] [2022-01-18 06:53:00,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586480900] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:00,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184205589] [2022-01-18 06:53:00,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:53:00,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:00,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:00,301 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) [2022-01-18 06:53:00,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-01-18 06:53:00,323 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:53:00,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:00,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 06:53:00,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:00,893 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:00,894 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:00,894 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 06:53:01,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:01,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:02,339 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:02,361 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:02,361 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 343 treesize of output 269 [2022-01-18 06:53:07,054 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:07,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184205589] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:07,055 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:07,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:53:07,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030238567] [2022-01-18 06:53:07,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:07,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:53:07,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:07,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:53:07,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:53:07,056 INFO L87 Difference]: Start difference. First operand 1792 states and 6431 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:14,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:14,126 INFO L93 Difference]: Finished difference Result 4121 states and 13207 transitions. [2022-01-18 06:53:14,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-18 06:53:14,126 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:53:14,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:14,134 INFO L225 Difference]: With dead ends: 4121 [2022-01-18 06:53:14,134 INFO L226 Difference]: Without dead ends: 4091 [2022-01-18 06:53:14,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=978, Invalid=4278, Unknown=0, NotChecked=0, Total=5256 [2022-01-18 06:53:14,135 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 462 mSDsluCounter, 679 mSDsCounter, 0 mSdLazyCounter, 1398 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 1517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 19 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:14,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 362 Invalid, 1517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1398 Invalid, 0 Unknown, 19 Unchecked, 1.0s Time] [2022-01-18 06:53:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2022-01-18 06:53:14,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 1837. [2022-01-18 06:53:14,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1837 states, 1836 states have (on average 3.579520697167756) internal successors, (6572), 1836 states have internal predecessors, (6572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:14,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1837 states to 1837 states and 6572 transitions. [2022-01-18 06:53:14,186 INFO L78 Accepts]: Start accepts. Automaton has 1837 states and 6572 transitions. Word has length 26 [2022-01-18 06:53:14,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:14,186 INFO L470 AbstractCegarLoop]: Abstraction has 1837 states and 6572 transitions. [2022-01-18 06:53:14,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:14,187 INFO L276 IsEmpty]: Start isEmpty. Operand 1837 states and 6572 transitions. [2022-01-18 06:53:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:53:14,190 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:14,190 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] [2022-01-18 06:53:14,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-01-18 06:53:14,391 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,SelfDestructingSolverStorable40 [2022-01-18 06:53:14,391 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:14,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:14,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1927464722, now seen corresponding path program 6 times [2022-01-18 06:53:14,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:14,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888753505] [2022-01-18 06:53:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:14,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:14,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:14,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888753505] [2022-01-18 06:53:14,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888753505] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:14,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639603892] [2022-01-18 06:53:14,841 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:53:14,841 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:14,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:14,842 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) [2022-01-18 06:53:14,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-01-18 06:53:14,868 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:53:14,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:14,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 06:53:14,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:15,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:15,457 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:15,457 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 85 [2022-01-18 06:53:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:16,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:17,261 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:17,262 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:17,276 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:17,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 335 treesize of output 253 [2022-01-18 06:53:18,690 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:18,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639603892] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:18,690 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:18,690 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 06:53:18,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383094634] [2022-01-18 06:53:18,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:18,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:53:18,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:18,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:53:18,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:53:18,691 INFO L87 Difference]: Start difference. First operand 1837 states and 6572 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:39,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:39,716 INFO L93 Difference]: Finished difference Result 4509 states and 14690 transitions. [2022-01-18 06:53:39,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-18 06:53:39,717 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:53:39,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:39,724 INFO L225 Difference]: With dead ends: 4509 [2022-01-18 06:53:39,724 INFO L226 Difference]: Without dead ends: 4442 [2022-01-18 06:53:39,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4211 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=1697, Invalid=10735, Unknown=0, NotChecked=0, Total=12432 [2022-01-18 06:53:39,727 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 625 mSDsluCounter, 1180 mSDsCounter, 0 mSdLazyCounter, 2602 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 625 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 2941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 2602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 242 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:39,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [625 Valid, 621 Invalid, 2941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 2602 Invalid, 0 Unknown, 242 Unchecked, 2.3s Time] [2022-01-18 06:53:39,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4442 states. [2022-01-18 06:53:39,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4442 to 1918. [2022-01-18 06:53:39,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1918 states, 1917 states have (on average 3.575899843505477) internal successors, (6855), 1917 states have internal predecessors, (6855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1918 states to 1918 states and 6855 transitions. [2022-01-18 06:53:39,768 INFO L78 Accepts]: Start accepts. Automaton has 1918 states and 6855 transitions. Word has length 26 [2022-01-18 06:53:39,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:39,768 INFO L470 AbstractCegarLoop]: Abstraction has 1918 states and 6855 transitions. [2022-01-18 06:53:39,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 1918 states and 6855 transitions. [2022-01-18 06:53:39,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:53:39,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:39,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:53:39,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2022-01-18 06:53:39,991 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,SelfDestructingSolverStorable41 [2022-01-18 06:53:39,991 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:39,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:39,992 INFO L85 PathProgramCache]: Analyzing trace with hash 717834456, now seen corresponding path program 34 times [2022-01-18 06:53:39,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:39,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798253502] [2022-01-18 06:53:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:39,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:40,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:40,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798253502] [2022-01-18 06:53:40,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798253502] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:40,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739109360] [2022-01-18 06:53:40,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:53:40,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:40,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:40,542 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) [2022-01-18 06:53:40,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-01-18 06:53:40,574 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:53:40,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:53:40,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:53:40,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:41,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:41,249 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:41,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:41,250 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:41,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-01-18 06:53:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:41,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:42,567 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:53:42,567 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 245 [2022-01-18 06:53:43,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:43,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739109360] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:53:43,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:53:43,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 06:53:43,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038025881] [2022-01-18 06:53:43,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:53:43,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:53:43,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:53:43,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:53:43,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:53:43,796 INFO L87 Difference]: Start difference. First operand 1918 states and 6855 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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) [2022-01-18 06:53:53,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:53:53,728 INFO L93 Difference]: Finished difference Result 3997 states and 13369 transitions. [2022-01-18 06:53:53,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 06:53:53,729 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 26 [2022-01-18 06:53:53,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:53:53,738 INFO L225 Difference]: With dead ends: 3997 [2022-01-18 06:53:53,738 INFO L226 Difference]: Without dead ends: 3967 [2022-01-18 06:53:53,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2843 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1175, Invalid=7381, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 06:53:53,739 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 323 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 1943 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:53:53,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 372 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1943 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 06:53:53,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3967 states. [2022-01-18 06:53:53,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3967 to 1991. [2022-01-18 06:53:53,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1991 states, 1990 states have (on average 3.571356783919598) internal successors, (7107), 1990 states have internal predecessors, (7107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:53:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 7107 transitions. [2022-01-18 06:53:53,788 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 7107 transitions. Word has length 26 [2022-01-18 06:53:53,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:53:53,788 INFO L470 AbstractCegarLoop]: Abstraction has 1991 states and 7107 transitions. [2022-01-18 06:53:53,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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) [2022-01-18 06:53:53,789 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 7107 transitions. [2022-01-18 06:53:53,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:53:53,792 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:53:53,792 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] [2022-01-18 06:53:53,813 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-01-18 06:53:53,992 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,SelfDestructingSolverStorable42 [2022-01-18 06:53:53,993 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:53:53,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:53:53,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1522881632, now seen corresponding path program 7 times [2022-01-18 06:53:53,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:53:53,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047565212] [2022-01-18 06:53:53,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:53:53,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:53:53,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:54,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:53:54,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047565212] [2022-01-18 06:53:54,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047565212] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:53:54,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273982308] [2022-01-18 06:53:54,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:53:54,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:53:54,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:53:54,579 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) [2022-01-18 06:53:54,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-01-18 06:53:54,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:53:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:53:54,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:53:56,062 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:53:56,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:53:56,063 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 06:53:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:53:56,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:53:57,467 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:53:57,467 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 323 treesize of output 273 [2022-01-18 06:54:16,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:16,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273982308] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:16,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:16,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:54:16,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76167890] [2022-01-18 06:54:16,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:16,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:54:16,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:16,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:54:16,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:54:16,990 INFO L87 Difference]: Start difference. First operand 1991 states and 7107 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:21,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:21,966 INFO L93 Difference]: Finished difference Result 5092 states and 16963 transitions. [2022-01-18 06:54:21,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-18 06:54:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:54:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:21,975 INFO L225 Difference]: With dead ends: 5092 [2022-01-18 06:54:21,976 INFO L226 Difference]: Without dead ends: 5078 [2022-01-18 06:54:21,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 11 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=633, Invalid=2789, Unknown=0, NotChecked=0, Total=3422 [2022-01-18 06:54:21,976 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 305 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 674 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 470 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:21,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 425 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 674 Invalid, 0 Unknown, 470 Unchecked, 0.5s Time] [2022-01-18 06:54:21,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5078 states. [2022-01-18 06:54:22,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5078 to 2019. [2022-01-18 06:54:22,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2019 states, 2018 states have (on average 3.576808721506442) internal successors, (7218), 2018 states have internal predecessors, (7218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:22,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2019 states to 2019 states and 7218 transitions. [2022-01-18 06:54:22,024 INFO L78 Accepts]: Start accepts. Automaton has 2019 states and 7218 transitions. Word has length 26 [2022-01-18 06:54:22,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:22,025 INFO L470 AbstractCegarLoop]: Abstraction has 2019 states and 7218 transitions. [2022-01-18 06:54:22,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:22,025 INFO L276 IsEmpty]: Start isEmpty. Operand 2019 states and 7218 transitions. [2022-01-18 06:54:22,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:54:22,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:22,028 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:22,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2022-01-18 06:54:22,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:22,244 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:22,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1221704100, now seen corresponding path program 35 times [2022-01-18 06:54:22,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:22,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669423512] [2022-01-18 06:54:22,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:22,244 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:22,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:22,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:22,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:22,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669423512] [2022-01-18 06:54:22,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669423512] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:22,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427582812] [2022-01-18 06:54:22,757 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:54:22,757 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:22,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:22,758 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) [2022-01-18 06:54:22,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-01-18 06:54:22,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 06:54:22,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:22,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:54:22,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:23,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:54:23,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:54:23,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:54:23,443 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:54:23,443 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 06:54:23,567 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:23,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:24,575 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:54:24,576 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 245 [2022-01-18 06:54:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:25,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427582812] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:25,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:25,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 06:54:25,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127578599] [2022-01-18 06:54:25,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:25,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:54:25,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:25,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:54:25,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:54:25,693 INFO L87 Difference]: Start difference. First operand 2019 states and 7218 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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) [2022-01-18 06:54:35,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:54:35,712 INFO L93 Difference]: Finished difference Result 4024 states and 13206 transitions. [2022-01-18 06:54:35,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-18 06:54:35,712 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 26 [2022-01-18 06:54:35,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:54:35,719 INFO L225 Difference]: With dead ends: 4024 [2022-01-18 06:54:35,720 INFO L226 Difference]: Without dead ends: 3969 [2022-01-18 06:54:35,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2512 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=1264, Invalid=6046, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 06:54:35,720 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 422 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 2545 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 2650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:54:35,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [422 Valid, 594 Invalid, 2650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2545 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-18 06:54:35,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3969 states. [2022-01-18 06:54:35,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3969 to 2062. [2022-01-18 06:54:35,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2062 states, 2061 states have (on average 3.5783600194080543) internal successors, (7375), 2061 states have internal predecessors, (7375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:54:35,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2062 states to 2062 states and 7375 transitions. [2022-01-18 06:54:35,770 INFO L78 Accepts]: Start accepts. Automaton has 2062 states and 7375 transitions. Word has length 26 [2022-01-18 06:54:35,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:54:35,770 INFO L470 AbstractCegarLoop]: Abstraction has 2062 states and 7375 transitions. [2022-01-18 06:54:35,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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) [2022-01-18 06:54:35,771 INFO L276 IsEmpty]: Start isEmpty. Operand 2062 states and 7375 transitions. [2022-01-18 06:54:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:54:35,774 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:54:35,774 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:54:35,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-01-18 06:54:35,974 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:35,974 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:54:35,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:54:35,975 INFO L85 PathProgramCache]: Analyzing trace with hash 2096944352, now seen corresponding path program 36 times [2022-01-18 06:54:35,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:54:35,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655018598] [2022-01-18 06:54:35,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:54:35,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:54:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:54:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:36,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:54:36,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655018598] [2022-01-18 06:54:36,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655018598] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:54:36,491 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087176791] [2022-01-18 06:54:36,491 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:54:36,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:54:36,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:54:36,492 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) [2022-01-18 06:54:36,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-01-18 06:54:36,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:54:36,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:54:36,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:54:36,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:54:37,066 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:54:37,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:54:37,079 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:54:37,079 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 115 treesize of output 101 [2022-01-18 06:54:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:37,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:54:38,639 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:54:38,639 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 245 [2022-01-18 06:54:40,417 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:54:40,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087176791] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:54:40,418 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:54:40,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2022-01-18 06:54:40,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423767507] [2022-01-18 06:54:40,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:54:40,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 06:54:40,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:54:40,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 06:54:40,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=601, Unknown=0, NotChecked=0, Total=702 [2022-01-18 06:54:40,418 INFO L87 Difference]: Start difference. First operand 2062 states and 7375 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 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) [2022-01-18 06:55:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:55:58,519 INFO L93 Difference]: Finished difference Result 8295 states and 25821 transitions. [2022-01-18 06:55:58,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 374 states. [2022-01-18 06:55:58,519 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 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 26 [2022-01-18 06:55:58,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:55:58,533 INFO L225 Difference]: With dead ends: 8295 [2022-01-18 06:55:58,533 INFO L226 Difference]: Without dead ends: 8160 [2022-01-18 06:55:58,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69401 ImplicationChecksByTransitivity, 73.8s TimeCoverageRelationStatistics Valid=13389, Invalid=140667, Unknown=0, NotChecked=0, Total=154056 [2022-01-18 06:55:58,539 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 1269 mSDsluCounter, 2799 mSDsCounter, 0 mSdLazyCounter, 6101 mSolverCounterSat, 338 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 1650 SdHoareTripleChecker+Invalid, 6439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 338 IncrementalHoareTripleChecker+Valid, 6101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:55:58,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 1650 Invalid, 6439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [338 Valid, 6101 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-01-18 06:55:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2022-01-18 06:55:58,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 2226. [2022-01-18 06:55:58,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2226 states, 2225 states have (on average 3.5644943820224717) internal successors, (7931), 2225 states have internal predecessors, (7931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:55:58,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2226 states to 2226 states and 7931 transitions. [2022-01-18 06:55:58,601 INFO L78 Accepts]: Start accepts. Automaton has 2226 states and 7931 transitions. Word has length 26 [2022-01-18 06:55:58,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:55:58,601 INFO L470 AbstractCegarLoop]: Abstraction has 2226 states and 7931 transitions. [2022-01-18 06:55:58,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 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) [2022-01-18 06:55:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2226 states and 7931 transitions. [2022-01-18 06:55:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:55:58,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:55:58,605 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] [2022-01-18 06:55:58,620 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2022-01-18 06:55:58,805 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,SelfDestructingSolverStorable45 [2022-01-18 06:55:58,805 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:55:58,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:55:58,806 INFO L85 PathProgramCache]: Analyzing trace with hash 918853184, now seen corresponding path program 8 times [2022-01-18 06:55:58,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:55:58,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289960563] [2022-01-18 06:55:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:55:58,806 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:55:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:55:59,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:55:59,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:55:59,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289960563] [2022-01-18 06:55:59,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289960563] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:55:59,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742753952] [2022-01-18 06:55:59,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:55:59,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:55:59,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:55:59,344 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) [2022-01-18 06:55:59,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-01-18 06:55:59,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:55:59,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:55:59,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 06:55:59,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:56:00,034 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:00,034 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 06:56:01,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:01,048 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:56:02,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:56:02,464 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:56:02,481 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:02,481 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 339 treesize of output 253 [2022-01-18 06:56:03,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:03,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742753952] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:56:03,692 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:56:03,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-01-18 06:56:03,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629903140] [2022-01-18 06:56:03,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:56:03,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:56:03,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:56:03,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:56:03,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:56:03,693 INFO L87 Difference]: Start difference. First operand 2226 states and 7931 transitions. Second operand has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:56:20,196 INFO L93 Difference]: Finished difference Result 4489 states and 14451 transitions. [2022-01-18 06:56:20,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-18 06:56:20,197 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:56:20,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:56:20,204 INFO L225 Difference]: With dead ends: 4489 [2022-01-18 06:56:20,204 INFO L226 Difference]: Without dead ends: 4355 [2022-01-18 06:56:20,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3043 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=1344, Invalid=7398, Unknown=0, NotChecked=0, Total=8742 [2022-01-18 06:56:20,205 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 414 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 2054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 06:56:20,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [414 Valid, 526 Invalid, 2054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1984 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-18 06:56:20,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2022-01-18 06:56:20,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 2300. [2022-01-18 06:56:20,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2300 states, 2299 states have (on average 3.557198782079165) internal successors, (8178), 2299 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:20,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2300 states to 2300 states and 8178 transitions. [2022-01-18 06:56:20,267 INFO L78 Accepts]: Start accepts. Automaton has 2300 states and 8178 transitions. Word has length 26 [2022-01-18 06:56:20,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:56:20,267 INFO L470 AbstractCegarLoop]: Abstraction has 2300 states and 8178 transitions. [2022-01-18 06:56:20,267 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.52) internal successors, (63), 25 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:20,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2300 states and 8178 transitions. [2022-01-18 06:56:20,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:56:20,271 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:56:20,271 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] [2022-01-18 06:56:20,286 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2022-01-18 06:56:20,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-01-18 06:56:20,471 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:56:20,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:56:20,472 INFO L85 PathProgramCache]: Analyzing trace with hash 193303520, now seen corresponding path program 9 times [2022-01-18 06:56:20,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:56:20,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511093258] [2022-01-18 06:56:20,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:56:20,472 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:56:20,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:56:20,902 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:20,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:56:20,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511093258] [2022-01-18 06:56:20,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511093258] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:56:20,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991588009] [2022-01-18 06:56:20,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:56:20,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:20,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:56:20,904 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) [2022-01-18 06:56:20,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-01-18 06:56:20,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:56:20,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:56:20,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:56:20,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:56:21,359 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:21,360 INFO L387 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 89 treesize of output 89 [2022-01-18 06:56:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:27,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:56:29,345 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:29,345 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 315 treesize of output 265 [2022-01-18 06:56:37,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:37,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991588009] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:56:37,437 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:56:37,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 12] total 28 [2022-01-18 06:56:37,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229999495] [2022-01-18 06:56:37,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:56:37,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 06:56:37,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:56:37,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 06:56:37,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=637, Unknown=0, NotChecked=0, Total=756 [2022-01-18 06:56:37,438 INFO L87 Difference]: Start difference. First operand 2300 states and 8178 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 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) [2022-01-18 06:56:42,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:56:42,444 INFO L93 Difference]: Finished difference Result 3928 states and 13451 transitions. [2022-01-18 06:56:42,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 06:56:42,444 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 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 26 [2022-01-18 06:56:42,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:56:42,451 INFO L225 Difference]: With dead ends: 3928 [2022-01-18 06:56:42,452 INFO L226 Difference]: Without dead ends: 3907 [2022-01-18 06:56:42,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=584, Invalid=2496, Unknown=0, NotChecked=0, Total=3080 [2022-01-18 06:56:42,452 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 298 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 298 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 1788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 524 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:56:42,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [298 Valid, 339 Invalid, 1788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1198 Invalid, 0 Unknown, 524 Unchecked, 0.9s Time] [2022-01-18 06:56:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2022-01-18 06:56:42,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 2326. [2022-01-18 06:56:42,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 3.557849462365591) internal successors, (8272), 2325 states have internal predecessors, (8272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 8272 transitions. [2022-01-18 06:56:42,495 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 8272 transitions. Word has length 26 [2022-01-18 06:56:42,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:56:42,495 INFO L470 AbstractCegarLoop]: Abstraction has 2326 states and 8272 transitions. [2022-01-18 06:56:42,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 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) [2022-01-18 06:56:42,495 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 8272 transitions. [2022-01-18 06:56:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:56:42,499 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:56:42,499 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] [2022-01-18 06:56:42,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-01-18 06:56:42,709 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,SelfDestructingSolverStorable47 [2022-01-18 06:56:42,710 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:56:42,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:56:42,710 INFO L85 PathProgramCache]: Analyzing trace with hash -483290174, now seen corresponding path program 10 times [2022-01-18 06:56:42,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:56:42,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523302012] [2022-01-18 06:56:42,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:56:42,710 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:56:42,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:56:43,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:43,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:56:43,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523302012] [2022-01-18 06:56:43,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523302012] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:56:43,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606356565] [2022-01-18 06:56:43,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:56:43,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:43,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:56:43,096 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) [2022-01-18 06:56:43,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-01-18 06:56:43,121 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:56:43,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:56:43,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:56:43,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:56:43,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:56:43,542 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:43,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 06:56:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:44,443 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:56:45,754 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:56:45,754 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 419 treesize of output 309 [2022-01-18 06:56:50,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:50,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606356565] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:56:50,598 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:56:50,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2022-01-18 06:56:50,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742389399] [2022-01-18 06:56:50,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:56:50,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-18 06:56:50,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:56:50,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-18 06:56:50,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-01-18 06:56:50,599 INFO L87 Difference]: Start difference. First operand 2326 states and 8272 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:55,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:56:55,110 INFO L93 Difference]: Finished difference Result 4253 states and 13868 transitions. [2022-01-18 06:56:55,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-18 06:56:55,111 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:56:55,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:56:55,118 INFO L225 Difference]: With dead ends: 4253 [2022-01-18 06:56:55,118 INFO L226 Difference]: Without dead ends: 4203 [2022-01-18 06:56:55,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2022-01-18 06:56:55,131 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 266 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 266 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 06:56:55,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [266 Valid, 314 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 1074 Invalid, 0 Unknown, 42 Unchecked, 0.8s Time] [2022-01-18 06:56:55,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2022-01-18 06:56:55,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 2347. [2022-01-18 06:56:55,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.561381074168798) internal successors, (8355), 2346 states have internal predecessors, (8355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8355 transitions. [2022-01-18 06:56:55,185 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8355 transitions. Word has length 26 [2022-01-18 06:56:55,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:56:55,185 INFO L470 AbstractCegarLoop]: Abstraction has 2347 states and 8355 transitions. [2022-01-18 06:56:55,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:56:55,186 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8355 transitions. [2022-01-18 06:56:55,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:56:55,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:56:55,189 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] [2022-01-18 06:56:55,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-01-18 06:56:55,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:55,390 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:56:55,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:56:55,390 INFO L85 PathProgramCache]: Analyzing trace with hash 999844764, now seen corresponding path program 11 times [2022-01-18 06:56:55,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:56:55,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949225547] [2022-01-18 06:56:55,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:56:55,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:56:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:56:55,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:55,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:56:55,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949225547] [2022-01-18 06:56:55,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949225547] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:56:55,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145619978] [2022-01-18 06:56:55,798 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 06:56:55,798 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:56:55,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:56:55,799 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) [2022-01-18 06:56:55,800 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-01-18 06:56:55,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 06:56:55,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:56:55,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 06:56:55,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:56:56,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:56:56,271 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:56,271 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 06:56:57,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:56:57,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:56:58,447 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:56:58,469 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:56:58,470 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 347 treesize of output 261 [2022-01-18 06:57:05,868 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:05,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145619978] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:57:05,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:57:05,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2022-01-18 06:57:05,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411480475] [2022-01-18 06:57:05,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:57:05,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:57:05,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:57:05,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:57:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:57:05,869 INFO L87 Difference]: Start difference. First operand 2347 states and 8355 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:33,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:57:33,294 INFO L93 Difference]: Finished difference Result 5771 states and 18551 transitions. [2022-01-18 06:57:33,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-18 06:57:33,294 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:57:33,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:57:33,305 INFO L225 Difference]: With dead ends: 5771 [2022-01-18 06:57:33,305 INFO L226 Difference]: Without dead ends: 5666 [2022-01-18 06:57:33,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6755 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=2353, Invalid=15203, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 06:57:33,306 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 371 mSDsluCounter, 1083 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:57:33,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 625 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2478 Invalid, 0 Unknown, 442 Unchecked, 2.1s Time] [2022-01-18 06:57:33,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5666 states. [2022-01-18 06:57:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5666 to 2463. [2022-01-18 06:57:33,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 3.5556458164094233) internal successors, (8754), 2462 states have internal predecessors, (8754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:33,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 8754 transitions. [2022-01-18 06:57:33,368 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 8754 transitions. Word has length 26 [2022-01-18 06:57:33,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:57:33,368 INFO L470 AbstractCegarLoop]: Abstraction has 2463 states and 8754 transitions. [2022-01-18 06:57:33,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:33,369 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 8754 transitions. [2022-01-18 06:57:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:57:33,372 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:57:33,372 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] [2022-01-18 06:57:33,388 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-01-18 06:57:33,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-01-18 06:57:33,573 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:57:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:57:33,573 INFO L85 PathProgramCache]: Analyzing trace with hash -340731392, now seen corresponding path program 12 times [2022-01-18 06:57:33,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:57:33,573 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524436970] [2022-01-18 06:57:33,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:57:33,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:57:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:34,013 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:57:34,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524436970] [2022-01-18 06:57:34,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524436970] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:57:34,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024375652] [2022-01-18 06:57:34,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 06:57:34,013 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:34,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:57:34,014 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) [2022-01-18 06:57:34,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-01-18 06:57:34,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 06:57:34,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:57:34,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 06:57:34,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:57:34,685 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:57:34,685 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:57:34,686 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 06:57:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:34,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:57:36,224 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:57:36,246 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:36,247 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 261 [2022-01-18 06:57:41,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:41,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024375652] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:57:41,314 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:57:41,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:57:41,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503123463] [2022-01-18 06:57:41,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:57:41,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:57:41,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:57:41,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:57:41,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:57:41,314 INFO L87 Difference]: Start difference. First operand 2463 states and 8754 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:57:47,282 INFO L93 Difference]: Finished difference Result 4483 states and 14789 transitions. [2022-01-18 06:57:47,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-18 06:57:47,282 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:57:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:57:47,290 INFO L225 Difference]: With dead ends: 4483 [2022-01-18 06:57:47,291 INFO L226 Difference]: Without dead ends: 4441 [2022-01-18 06:57:47,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1390 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=799, Invalid=3491, Unknown=0, NotChecked=0, Total=4290 [2022-01-18 06:57:47,291 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 369 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 1030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 217 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:57:47,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 251 Invalid, 1030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 732 Invalid, 0 Unknown, 217 Unchecked, 0.7s Time] [2022-01-18 06:57:47,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4441 states. [2022-01-18 06:57:47,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4441 to 2536. [2022-01-18 06:57:47,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2536 states, 2535 states have (on average 3.560552268244576) internal successors, (9026), 2535 states have internal predecessors, (9026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2536 states to 2536 states and 9026 transitions. [2022-01-18 06:57:47,335 INFO L78 Accepts]: Start accepts. Automaton has 2536 states and 9026 transitions. Word has length 26 [2022-01-18 06:57:47,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:57:47,335 INFO L470 AbstractCegarLoop]: Abstraction has 2536 states and 9026 transitions. [2022-01-18 06:57:47,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:57:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2536 states and 9026 transitions. [2022-01-18 06:57:47,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:57:47,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:57:47,340 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] [2022-01-18 06:57:47,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2022-01-18 06:57:47,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:47,555 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:57:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:57:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1834639114, now seen corresponding path program 13 times [2022-01-18 06:57:47,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:57:47,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322041379] [2022-01-18 06:57:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:57:47,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:57:47,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:48,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:48,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:57:48,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322041379] [2022-01-18 06:57:48,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322041379] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:57:48,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079254515] [2022-01-18 06:57:48,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:57:48,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:57:48,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:57:48,053 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) [2022-01-18 06:57:48,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-01-18 06:57:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:57:48,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:57:48,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:57:48,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:57:48,641 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:57:48,641 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 06:57:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:49,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:57:50,543 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:57:50,543 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 339 treesize of output 261 [2022-01-18 06:57:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:57:54,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079254515] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:57:54,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:57:54,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:57:54,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346912784] [2022-01-18 06:57:54,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:57:54,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:57:54,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:57:54,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:57:54,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:57:54,460 INFO L87 Difference]: Start difference. First operand 2536 states and 9026 transitions. Second operand has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:02,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:02,799 INFO L93 Difference]: Finished difference Result 4695 states and 15530 transitions. [2022-01-18 06:58:02,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-18 06:58:02,800 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:58:02,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:02,808 INFO L225 Difference]: With dead ends: 4695 [2022-01-18 06:58:02,808 INFO L226 Difference]: Without dead ends: 4642 [2022-01-18 06:58:02,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1647 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=817, Invalid=4585, Unknown=0, NotChecked=0, Total=5402 [2022-01-18 06:58:02,809 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 315 mSDsluCounter, 837 mSDsCounter, 0 mSdLazyCounter, 1988 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 2046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 1988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:02,809 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 468 Invalid, 2046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 1988 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 06:58:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4642 states. [2022-01-18 06:58:02,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4642 to 2555. [2022-01-18 06:58:02,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2555 states, 2554 states have (on average 3.5602975724353954) internal successors, (9093), 2554 states have internal predecessors, (9093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:02,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2555 states to 2555 states and 9093 transitions. [2022-01-18 06:58:02,857 INFO L78 Accepts]: Start accepts. Automaton has 2555 states and 9093 transitions. Word has length 26 [2022-01-18 06:58:02,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:02,857 INFO L470 AbstractCegarLoop]: Abstraction has 2555 states and 9093 transitions. [2022-01-18 06:58:02,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6153846153846154) internal successors, (68), 26 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:02,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2555 states and 9093 transitions. [2022-01-18 06:58:02,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:02,861 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:02,861 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] [2022-01-18 06:58:02,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-01-18 06:58:03,061 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,SelfDestructingSolverStorable51 [2022-01-18 06:58:03,061 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:03,061 INFO L85 PathProgramCache]: Analyzing trace with hash 646760220, now seen corresponding path program 14 times [2022-01-18 06:58:03,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:03,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400281805] [2022-01-18 06:58:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:03,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:03,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:03,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:58:03,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400281805] [2022-01-18 06:58:03,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400281805] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:58:03,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121700734] [2022-01-18 06:58:03,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:58:03,572 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:03,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:58:03,573 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) [2022-01-18 06:58:03,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-01-18 06:58:03,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:58:03,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:58:03,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:58:03,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:58:03,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:03,970 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:03,970 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 06:58:04,715 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:04,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:58:06,047 INFO L353 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2022-01-18 06:58:06,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 355 treesize of output 269 [2022-01-18 06:58:10,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:10,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121700734] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:58:10,248 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:58:10,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 26 [2022-01-18 06:58:10,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959971536] [2022-01-18 06:58:10,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:58:10,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:58:10,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:58:10,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:58:10,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:58:10,248 INFO L87 Difference]: Start difference. First operand 2555 states and 9093 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 06:58:18,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:18,564 INFO L93 Difference]: Finished difference Result 4892 states and 16164 transitions. [2022-01-18 06:58:18,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-18 06:58:18,564 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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 26 [2022-01-18 06:58:18,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:18,573 INFO L225 Difference]: With dead ends: 4892 [2022-01-18 06:58:18,573 INFO L226 Difference]: Without dead ends: 4827 [2022-01-18 06:58:18,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1664 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=813, Invalid=4737, Unknown=0, NotChecked=0, Total=5550 [2022-01-18 06:58:18,574 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 391 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 1427 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:18,574 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 336 Invalid, 1501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1427 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-18 06:58:18,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4827 states. [2022-01-18 06:58:18,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4827 to 2561. [2022-01-18 06:58:18,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2561 states, 2560 states have (on average 3.559765625) internal successors, (9113), 2560 states have internal predecessors, (9113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:18,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2561 states to 2561 states and 9113 transitions. [2022-01-18 06:58:18,630 INFO L78 Accepts]: Start accepts. Automaton has 2561 states and 9113 transitions. Word has length 26 [2022-01-18 06:58:18,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:18,630 INFO L470 AbstractCegarLoop]: Abstraction has 2561 states and 9113 transitions. [2022-01-18 06:58:18,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 26 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) [2022-01-18 06:58:18,630 INFO L276 IsEmpty]: Start isEmpty. Operand 2561 states and 9113 transitions. [2022-01-18 06:58:18,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:18,633 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:18,633 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:58:18,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-01-18 06:58:18,834 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,SelfDestructingSolverStorable52 [2022-01-18 06:58:18,834 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:18,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:18,835 INFO L85 PathProgramCache]: Analyzing trace with hash 902763630, now seen corresponding path program 37 times [2022-01-18 06:58:18,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:18,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598254406] [2022-01-18 06:58:18,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:18,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:19,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:58:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598254406] [2022-01-18 06:58:19,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598254406] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:58:19,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281081220] [2022-01-18 06:58:19,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 06:58:19,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:19,271 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:58:19,272 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) [2022-01-18 06:58:19,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-01-18 06:58:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:19,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:58:19,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:58:19,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:19,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:19,932 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:19,933 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:19,933 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 75 [2022-01-18 06:58:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:20,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:58:21,227 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:58:21,227 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-01-18 06:58:22,390 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:22,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281081220] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:58:22,390 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:58:22,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 06:58:22,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146535455] [2022-01-18 06:58:22,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:58:22,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:58:22,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:58:22,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:58:22,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:58:22,391 INFO L87 Difference]: Start difference. First operand 2561 states and 9113 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:26,284 INFO L93 Difference]: Finished difference Result 4205 states and 14207 transitions. [2022-01-18 06:58:26,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-18 06:58:26,284 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:58:26,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:26,291 INFO L225 Difference]: With dead ends: 4205 [2022-01-18 06:58:26,292 INFO L226 Difference]: Without dead ends: 4175 [2022-01-18 06:58:26,292 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=583, Invalid=3449, Unknown=0, NotChecked=0, Total=4032 [2022-01-18 06:58:26,292 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 244 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 1319 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:26,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [244 Valid, 328 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1319 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-18 06:58:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2022-01-18 06:58:26,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 2581. [2022-01-18 06:58:26,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2581 states, 2580 states have (on average 3.5554263565891473) internal successors, (9173), 2580 states have internal predecessors, (9173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:26,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2581 states to 2581 states and 9173 transitions. [2022-01-18 06:58:26,335 INFO L78 Accepts]: Start accepts. Automaton has 2581 states and 9173 transitions. Word has length 26 [2022-01-18 06:58:26,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:26,335 INFO L470 AbstractCegarLoop]: Abstraction has 2581 states and 9173 transitions. [2022-01-18 06:58:26,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:26,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2581 states and 9173 transitions. [2022-01-18 06:58:26,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:26,339 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:26,339 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:58:26,357 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-01-18 06:58:26,554 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:26,555 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:26,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:26,555 INFO L85 PathProgramCache]: Analyzing trace with hash 2020528988, now seen corresponding path program 38 times [2022-01-18 06:58:26,555 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:26,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981005576] [2022-01-18 06:58:26,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:26,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:26,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:26,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:58:26,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981005576] [2022-01-18 06:58:26,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981005576] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:58:26,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158152570] [2022-01-18 06:58:26,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 06:58:26,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:26,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:58:26,996 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) [2022-01-18 06:58:26,997 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-01-18 06:58:27,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 06:58:27,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:58:27,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 06:58:27,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:58:27,645 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:27,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:27,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:27,659 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:27,659 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 103 [2022-01-18 06:58:28,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:28,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:58:30,416 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:30,417 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:30,418 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:30,431 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:30,431 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 367 treesize of output 239 [2022-01-18 06:58:31,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:31,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158152570] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:58:31,205 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:58:31,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-01-18 06:58:31,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815737786] [2022-01-18 06:58:31,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:58:31,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:58:31,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:58:31,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:58:31,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:58:31,206 INFO L87 Difference]: Start difference. First operand 2581 states and 9173 transitions. Second operand has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 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) [2022-01-18 06:58:43,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:43,730 INFO L93 Difference]: Finished difference Result 4403 states and 14681 transitions. [2022-01-18 06:58:43,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 06:58:43,731 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 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 26 [2022-01-18 06:58:43,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:43,739 INFO L225 Difference]: With dead ends: 4403 [2022-01-18 06:58:43,739 INFO L226 Difference]: Without dead ends: 4273 [2022-01-18 06:58:43,739 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2758 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=1443, Invalid=6929, Unknown=0, NotChecked=0, Total=8372 [2022-01-18 06:58:43,739 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 377 mSDsluCounter, 956 mSDsCounter, 0 mSdLazyCounter, 1863 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 474 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1863 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:43,740 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 474 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1863 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-18 06:58:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2022-01-18 06:58:43,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 2623. [2022-01-18 06:58:43,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2623 states, 2622 states have (on average 3.54233409610984) internal successors, (9288), 2622 states have internal predecessors, (9288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:43,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2623 states to 2623 states and 9288 transitions. [2022-01-18 06:58:43,782 INFO L78 Accepts]: Start accepts. Automaton has 2623 states and 9288 transitions. Word has length 26 [2022-01-18 06:58:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:43,782 INFO L470 AbstractCegarLoop]: Abstraction has 2623 states and 9288 transitions. [2022-01-18 06:58:43,782 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.4482758620689653) internal successors, (71), 29 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) [2022-01-18 06:58:43,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2623 states and 9288 transitions. [2022-01-18 06:58:43,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:43,785 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:43,785 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:58:43,801 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-01-18 06:58:43,986 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,SelfDestructingSolverStorable54 [2022-01-18 06:58:43,986 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:43,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1206563744, now seen corresponding path program 39 times [2022-01-18 06:58:43,987 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:43,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6362309] [2022-01-18 06:58:43,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:43,987 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:58:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:44,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:58:44,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6362309] [2022-01-18 06:58:44,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6362309] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:58:44,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609552709] [2022-01-18 06:58:44,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:58:44,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:58:44,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:58:44,468 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) [2022-01-18 06:58:44,468 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-01-18 06:58:44,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-01-18 06:58:44,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:58:44,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:58:44,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:58:44,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:44,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:45,005 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:58:45,006 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 125 treesize of output 115 [2022-01-18 06:58:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:46,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:58:51,551 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:51,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:51,553 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:58:51,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:58:51,555 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 303 treesize of output 181 [2022-01-18 06:58:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:58:51,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609552709] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:58:51,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:58:51,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2022-01-18 06:58:51,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615288730] [2022-01-18 06:58:51,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:58:51,759 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-18 06:58:51,759 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:58:51,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-18 06:58:51,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2022-01-18 06:58:51,760 INFO L87 Difference]: Start difference. First operand 2623 states and 9288 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 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) [2022-01-18 06:58:59,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:58:59,355 INFO L93 Difference]: Finished difference Result 4946 states and 16617 transitions. [2022-01-18 06:58:59,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 06:58:59,356 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 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 26 [2022-01-18 06:58:59,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:58:59,365 INFO L225 Difference]: With dead ends: 4946 [2022-01-18 06:58:59,365 INFO L226 Difference]: Without dead ends: 4901 [2022-01-18 06:58:59,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2259 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1192, Invalid=6118, Unknown=0, NotChecked=0, Total=7310 [2022-01-18 06:58:59,366 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 381 mSDsluCounter, 865 mSDsCounter, 0 mSdLazyCounter, 1560 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 505 SdHoareTripleChecker+Invalid, 2344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 685 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 06:58:59,366 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 505 Invalid, 2344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1560 Invalid, 0 Unknown, 685 Unchecked, 1.1s Time] [2022-01-18 06:58:59,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4901 states. [2022-01-18 06:58:59,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4901 to 2714. [2022-01-18 06:58:59,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2713 states have (on average 3.5307777368227056) internal successors, (9579), 2713 states have internal predecessors, (9579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:58:59,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 9579 transitions. [2022-01-18 06:58:59,418 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 9579 transitions. Word has length 26 [2022-01-18 06:58:59,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:58:59,418 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 9579 transitions. [2022-01-18 06:58:59,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 29 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) [2022-01-18 06:58:59,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 9579 transitions. [2022-01-18 06:58:59,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:58:59,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:58:59,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 06:58:59,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-01-18 06:58:59,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-01-18 06:58:59,623 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:58:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:58:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash 267653912, now seen corresponding path program 40 times [2022-01-18 06:58:59,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:58:59,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340449674] [2022-01-18 06:58:59,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:58:59,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:58:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:59:00,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:00,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:59:00,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340449674] [2022-01-18 06:59:00,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340449674] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:59:00,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913311748] [2022-01-18 06:59:00,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:59:00,067 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:00,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:59:00,068 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) [2022-01-18 06:59:00,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-01-18 06:59:00,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:59:00,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:59:00,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 06:59:00,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:59:00,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:00,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:00,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:00,712 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:00,713 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 75 [2022-01-18 06:59:00,857 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:00,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:59:02,199 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 06:59:02,200 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 363 treesize of output 245 [2022-01-18 06:59:03,562 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:03,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913311748] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:59:03,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:59:03,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2022-01-18 06:59:03,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291428549] [2022-01-18 06:59:03,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:59:03,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 06:59:03,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:59:03,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 06:59:03,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2022-01-18 06:59:03,563 INFO L87 Difference]: Start difference. First operand 2714 states and 9579 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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) [2022-01-18 06:59:09,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:59:09,797 INFO L93 Difference]: Finished difference Result 4529 states and 15159 transitions. [2022-01-18 06:59:09,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-18 06:59:09,797 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 26 [2022-01-18 06:59:09,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:59:09,806 INFO L225 Difference]: With dead ends: 4529 [2022-01-18 06:59:09,806 INFO L226 Difference]: Without dead ends: 4499 [2022-01-18 06:59:09,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2101 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=850, Invalid=5630, Unknown=0, NotChecked=0, Total=6480 [2022-01-18 06:59:09,806 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 242 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 2089 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 2232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 2089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 06:59:09,807 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [242 Valid, 557 Invalid, 2232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 2089 Invalid, 0 Unknown, 63 Unchecked, 1.3s Time] [2022-01-18 06:59:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4499 states. [2022-01-18 06:59:09,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4499 to 2752. [2022-01-18 06:59:09,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2752 states, 2751 states have (on average 3.5223555070883314) internal successors, (9690), 2751 states have internal predecessors, (9690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:09,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2752 states to 2752 states and 9690 transitions. [2022-01-18 06:59:09,855 INFO L78 Accepts]: Start accepts. Automaton has 2752 states and 9690 transitions. Word has length 26 [2022-01-18 06:59:09,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:59:09,855 INFO L470 AbstractCegarLoop]: Abstraction has 2752 states and 9690 transitions. [2022-01-18 06:59:09,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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) [2022-01-18 06:59:09,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2752 states and 9690 transitions. [2022-01-18 06:59:09,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:59:09,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:59:09,859 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] [2022-01-18 06:59:09,874 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2022-01-18 06:59:10,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:10,060 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:59:10,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:59:10,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1794939168, now seen corresponding path program 15 times [2022-01-18 06:59:10,060 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:59:10,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184503613] [2022-01-18 06:59:10,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:59:10,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:59:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:59:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:10,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:59:10,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184503613] [2022-01-18 06:59:10,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184503613] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:59:10,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700796569] [2022-01-18 06:59:10,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 06:59:10,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:10,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:59:10,517 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) [2022-01-18 06:59:10,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-01-18 06:59:10,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 06:59:10,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:59:10,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 06:59:10,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:59:11,903 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:11,904 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:11,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 06:59:12,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:12,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:59:13,319 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:59:13,320 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 315 treesize of output 265 [2022-01-18 06:59:38,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:38,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700796569] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:59:38,740 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:59:38,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:59:38,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149104702] [2022-01-18 06:59:38,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:59:38,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:59:38,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:59:38,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:59:38,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=511, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:59:38,741 INFO L87 Difference]: Start difference. First operand 2752 states and 9690 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:44,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 06:59:44,209 INFO L93 Difference]: Finished difference Result 6243 states and 19866 transitions. [2022-01-18 06:59:44,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-18 06:59:44,209 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 06:59:44,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 06:59:44,221 INFO L225 Difference]: With dead ends: 6243 [2022-01-18 06:59:44,221 INFO L226 Difference]: Without dead ends: 6213 [2022-01-18 06:59:44,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1524 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=934, Invalid=3622, Unknown=0, NotChecked=0, Total=4556 [2022-01-18 06:59:44,222 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 390 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 1208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 314 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-18 06:59:44,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 357 Invalid, 1208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 828 Invalid, 0 Unknown, 314 Unchecked, 0.7s Time] [2022-01-18 06:59:44,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6213 states. [2022-01-18 06:59:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6213 to 2839. [2022-01-18 06:59:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 3.5419309372797745) internal successors, (10052), 2838 states have internal predecessors, (10052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:44,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 10052 transitions. [2022-01-18 06:59:44,294 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 10052 transitions. Word has length 26 [2022-01-18 06:59:44,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 06:59:44,294 INFO L470 AbstractCegarLoop]: Abstraction has 2839 states and 10052 transitions. [2022-01-18 06:59:44,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 06:59:44,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 10052 transitions. [2022-01-18 06:59:44,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 06:59:44,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 06:59:44,299 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] [2022-01-18 06:59:44,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-01-18 06:59:44,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:44,500 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 06:59:44,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 06:59:44,501 INFO L85 PathProgramCache]: Analyzing trace with hash 1006120406, now seen corresponding path program 16 times [2022-01-18 06:59:44,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 06:59:44,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011310723] [2022-01-18 06:59:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 06:59:44,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 06:59:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 06:59:44,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:44,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 06:59:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011310723] [2022-01-18 06:59:44,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011310723] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 06:59:44,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767529538] [2022-01-18 06:59:44,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 06:59:44,941 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 06:59:44,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 06:59:44,942 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) [2022-01-18 06:59:44,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-01-18 06:59:44,966 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 06:59:44,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 06:59:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 06:59:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 06:59:45,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 06:59:45,658 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:45,660 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 06:59:45,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:45,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 06:59:47,091 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 06:59:47,116 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 06:59:47,116 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 339 treesize of output 261 [2022-01-18 06:59:52,624 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 06:59:52,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767529538] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 06:59:52,625 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 06:59:52,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 26 [2022-01-18 06:59:52,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045602854] [2022-01-18 06:59:52,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 06:59:52,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 06:59:52,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 06:59:52,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 06:59:52,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2022-01-18 06:59:52,625 INFO L87 Difference]: Start difference. First operand 2839 states and 10052 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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) [2022-01-18 07:00:02,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:00:02,003 INFO L93 Difference]: Finished difference Result 6734 states and 21590 transitions. [2022-01-18 07:00:02,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-18 07:00:02,004 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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 26 [2022-01-18 07:00:02,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:00:02,017 INFO L225 Difference]: With dead ends: 6734 [2022-01-18 07:00:02,017 INFO L226 Difference]: Without dead ends: 6704 [2022-01-18 07:00:02,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1543, Invalid=5597, Unknown=0, NotChecked=0, Total=7140 [2022-01-18 07:00:02,018 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 727 mSDsluCounter, 600 mSDsCounter, 0 mSdLazyCounter, 1310 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 75 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:00:02,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [727 Valid, 360 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1310 Invalid, 0 Unknown, 75 Unchecked, 1.1s Time] [2022-01-18 07:00:02,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6704 states. [2022-01-18 07:00:02,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6704 to 2965. [2022-01-18 07:00:02,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2965 states, 2964 states have (on average 3.5418353576248314) internal successors, (10498), 2964 states have internal predecessors, (10498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:02,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2965 states to 2965 states and 10498 transitions. [2022-01-18 07:00:02,106 INFO L78 Accepts]: Start accepts. Automaton has 2965 states and 10498 transitions. Word has length 26 [2022-01-18 07:00:02,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:00:02,107 INFO L470 AbstractCegarLoop]: Abstraction has 2965 states and 10498 transitions. [2022-01-18 07:00:02,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 26 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) [2022-01-18 07:00:02,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2965 states and 10498 transitions. [2022-01-18 07:00:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:00:02,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:00:02,111 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] [2022-01-18 07:00:02,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-01-18 07:00:02,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:02,312 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:00:02,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:00:02,312 INFO L85 PathProgramCache]: Analyzing trace with hash -205068792, now seen corresponding path program 17 times [2022-01-18 07:00:02,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:00:02,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555400125] [2022-01-18 07:00:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:00:02,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:00:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:02,918 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:00:02,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555400125] [2022-01-18 07:00:02,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555400125] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:00:02,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628700539] [2022-01-18 07:00:02,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:00:02,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:02,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:00:02,919 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) [2022-01-18 07:00:02,920 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-01-18 07:00:02,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-01-18 07:00:02,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:00:02,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2022-01-18 07:00:02,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:00:03,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:03,671 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:03,672 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 109 treesize of output 75 [2022-01-18 07:00:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:03,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:00:05,380 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:05,403 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:05,403 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 411 treesize of output 309 [2022-01-18 07:00:11,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:11,316 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628700539] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:00:11,316 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:00:11,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 07:00:11,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874559104] [2022-01-18 07:00:11,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:00:11,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:00:11,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:00:11,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:00:11,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:00:11,317 INFO L87 Difference]: Start difference. First operand 2965 states and 10498 transitions. Second operand has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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) [2022-01-18 07:00:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:00:26,706 INFO L93 Difference]: Finished difference Result 6581 states and 21007 transitions. [2022-01-18 07:00:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-18 07:00:26,706 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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 26 [2022-01-18 07:00:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:00:26,717 INFO L225 Difference]: With dead ends: 6581 [2022-01-18 07:00:26,717 INFO L226 Difference]: Without dead ends: 6544 [2022-01-18 07:00:26,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 52 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3535 ImplicationChecksByTransitivity, 15.3s TimeCoverageRelationStatistics Valid=1646, Invalid=7474, Unknown=0, NotChecked=0, Total=9120 [2022-01-18 07:00:26,718 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 486 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 879 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 486 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1623 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 654 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:00:26,718 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [486 Valid, 403 Invalid, 1623 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 879 Invalid, 0 Unknown, 654 Unchecked, 1.0s Time] [2022-01-18 07:00:26,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6544 states. [2022-01-18 07:00:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6544 to 3055. [2022-01-18 07:00:26,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3055 states, 3054 states have (on average 3.5546823837590047) internal successors, (10856), 3054 states have internal predecessors, (10856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:26,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3055 states to 3055 states and 10856 transitions. [2022-01-18 07:00:26,777 INFO L78 Accepts]: Start accepts. Automaton has 3055 states and 10856 transitions. Word has length 26 [2022-01-18 07:00:26,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:00:26,777 INFO L470 AbstractCegarLoop]: Abstraction has 3055 states and 10856 transitions. [2022-01-18 07:00:26,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.357142857142857) internal successors, (66), 28 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) [2022-01-18 07:00:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3055 states and 10856 transitions. [2022-01-18 07:00:26,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:00:26,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:00:26,781 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] [2022-01-18 07:00:26,797 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-01-18 07:00:26,981 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,SelfDestructingSolverStorable59 [2022-01-18 07:00:26,982 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:00:26,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:00:26,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1698976514, now seen corresponding path program 18 times [2022-01-18 07:00:26,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:00:26,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941670419] [2022-01-18 07:00:26,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:00:26,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:00:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:27,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:27,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:00:27,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941670419] [2022-01-18 07:00:27,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941670419] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:00:27,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400256305] [2022-01-18 07:00:27,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:00:27,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:27,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:00:27,645 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) [2022-01-18 07:00:27,646 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-01-18 07:00:27,671 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-01-18 07:00:27,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:00:27,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:00:27,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:00:29,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:29,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:29,472 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:29,472 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 07:00:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:30,155 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:00:31,710 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:31,711 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:31,729 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:31,730 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 379 treesize of output 297 [2022-01-18 07:00:34,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:34,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400256305] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:00:34,043 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:00:34,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 07:00:34,043 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000050526] [2022-01-18 07:00:34,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:00:34,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:00:34,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:00:34,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:00:34,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:00:34,044 INFO L87 Difference]: Start difference. First operand 3055 states and 10856 transitions. Second operand has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:50,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:00:50,706 INFO L93 Difference]: Finished difference Result 7389 states and 24489 transitions. [2022-01-18 07:00:50,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-18 07:00:50,707 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:00:50,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:00:50,723 INFO L225 Difference]: With dead ends: 7389 [2022-01-18 07:00:50,723 INFO L226 Difference]: Without dead ends: 7344 [2022-01-18 07:00:50,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 35 SyntacticMatches, 6 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7161 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=2741, Invalid=14815, Unknown=0, NotChecked=0, Total=17556 [2022-01-18 07:00:50,725 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 633 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 1678 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 633 SdHoareTripleChecker+Valid, 863 SdHoareTripleChecker+Invalid, 3337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1678 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1551 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:00:50,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [633 Valid, 863 Invalid, 3337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1678 Invalid, 0 Unknown, 1551 Unchecked, 1.5s Time] [2022-01-18 07:00:50,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7344 states. [2022-01-18 07:00:50,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7344 to 3077. [2022-01-18 07:00:50,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3077 states, 3076 states have (on average 3.565344603381014) internal successors, (10967), 3076 states have internal predecessors, (10967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3077 states to 3077 states and 10967 transitions. [2022-01-18 07:00:50,814 INFO L78 Accepts]: Start accepts. Automaton has 3077 states and 10967 transitions. Word has length 26 [2022-01-18 07:00:50,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:00:50,814 INFO L470 AbstractCegarLoop]: Abstraction has 3077 states and 10967 transitions. [2022-01-18 07:00:50,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.4285714285714284) internal successors, (68), 28 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:00:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3077 states and 10967 transitions. [2022-01-18 07:00:50,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:00:50,819 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:00:50,819 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] [2022-01-18 07:00:50,835 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-01-18 07:00:51,019 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,SelfDestructingSolverStorable60 [2022-01-18 07:00:51,020 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:00:51,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:00:51,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1822601572, now seen corresponding path program 19 times [2022-01-18 07:00:51,020 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:00:51,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54539263] [2022-01-18 07:00:51,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:00:51,021 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:00:51,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:51,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:51,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:00:51,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54539263] [2022-01-18 07:00:51,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54539263] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:00:51,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556435841] [2022-01-18 07:00:51,365 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:00:51,365 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:00:51,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:00:51,366 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) [2022-01-18 07:00:51,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-01-18 07:00:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:00:51,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 07:00:51,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:00:51,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:00:51,860 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:51,860 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 109 treesize of output 83 [2022-01-18 07:00:52,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:52,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:00:53,821 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:00:53,845 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:00:53,846 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 347 treesize of output 269 [2022-01-18 07:00:57,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:00:57,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556435841] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:00:57,166 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:00:57,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 07:00:57,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423914727] [2022-01-18 07:00:57,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:00:57,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:00:57,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:00:57,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:00:57,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:00:57,167 INFO L87 Difference]: Start difference. First operand 3077 states and 10967 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:09,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:01:09,611 INFO L93 Difference]: Finished difference Result 7294 states and 23512 transitions. [2022-01-18 07:01:09,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-18 07:01:09,612 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:01:09,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:01:09,625 INFO L225 Difference]: With dead ends: 7294 [2022-01-18 07:01:09,625 INFO L226 Difference]: Without dead ends: 7241 [2022-01-18 07:01:09,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2986 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1731, Invalid=6459, Unknown=0, NotChecked=0, Total=8190 [2022-01-18 07:01:09,626 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 657 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1723 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 2024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 1723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-18 07:01:09,626 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [657 Valid, 581 Invalid, 2024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 1723 Invalid, 0 Unknown, 173 Unchecked, 1.4s Time] [2022-01-18 07:01:09,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7241 states. [2022-01-18 07:01:09,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7241 to 3138. [2022-01-18 07:01:09,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3138 states, 3137 states have (on average 3.571246413771119) internal successors, (11203), 3137 states have internal predecessors, (11203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3138 states to 3138 states and 11203 transitions. [2022-01-18 07:01:09,711 INFO L78 Accepts]: Start accepts. Automaton has 3138 states and 11203 transitions. Word has length 26 [2022-01-18 07:01:09,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:01:09,711 INFO L470 AbstractCegarLoop]: Abstraction has 3138 states and 11203 transitions. [2022-01-18 07:01:09,711 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:09,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3138 states and 11203 transitions. [2022-01-18 07:01:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:01:09,715 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:01:09,715 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] [2022-01-18 07:01:09,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2022-01-18 07:01:09,916 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,SelfDestructingSolverStorable61 [2022-01-18 07:01:09,916 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:01:09,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:01:09,916 INFO L85 PathProgramCache]: Analyzing trace with hash -629380028, now seen corresponding path program 20 times [2022-01-18 07:01:09,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:01:09,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097369088] [2022-01-18 07:01:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:01:09,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:01:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:01:10,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:10,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:01:10,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097369088] [2022-01-18 07:01:10,326 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097369088] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:01:10,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247566613] [2022-01-18 07:01:10,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:01:10,327 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:10,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:01:10,328 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) [2022-01-18 07:01:10,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-01-18 07:01:10,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:01:10,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:01:10,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 07:01:10,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:01:11,013 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:11,013 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 109 treesize of output 91 [2022-01-18 07:01:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:12,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:01:14,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:01:14,083 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:01:14,100 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:14,101 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 347 treesize of output 261 [2022-01-18 07:01:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:16,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247566613] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:01:16,224 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:01:16,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2022-01-18 07:01:16,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264947052] [2022-01-18 07:01:16,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:01:16,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:01:16,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:01:16,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:01:16,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=634, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:01:16,225 INFO L87 Difference]: Start difference. First operand 3138 states and 11203 transitions. Second operand has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 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) [2022-01-18 07:01:42,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:01:42,086 INFO L93 Difference]: Finished difference Result 7072 states and 23270 transitions. [2022-01-18 07:01:42,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-18 07:01:42,086 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 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 26 [2022-01-18 07:01:42,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:01:42,099 INFO L225 Difference]: With dead ends: 7072 [2022-01-18 07:01:42,099 INFO L226 Difference]: Without dead ends: 7027 [2022-01-18 07:01:42,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 38 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6959 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=2839, Invalid=15251, Unknown=0, NotChecked=0, Total=18090 [2022-01-18 07:01:42,100 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 750 mSDsluCounter, 1273 mSDsCounter, 0 mSdLazyCounter, 1814 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 3698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1762 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-18 07:01:42,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 729 Invalid, 3698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1814 Invalid, 0 Unknown, 1762 Unchecked, 1.6s Time] [2022-01-18 07:01:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7027 states. [2022-01-18 07:01:42,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7027 to 3150. [2022-01-18 07:01:42,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3150 states, 3149 states have (on average 3.5773261352810417) internal successors, (11265), 3149 states have internal predecessors, (11265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:01:42,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3150 states to 3150 states and 11265 transitions. [2022-01-18 07:01:42,188 INFO L78 Accepts]: Start accepts. Automaton has 3150 states and 11265 transitions. Word has length 26 [2022-01-18 07:01:42,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:01:42,188 INFO L470 AbstractCegarLoop]: Abstraction has 3150 states and 11265 transitions. [2022-01-18 07:01:42,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5) internal successors, (70), 28 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) [2022-01-18 07:01:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 3150 states and 11265 transitions. [2022-01-18 07:01:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:01:42,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:01:42,193 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] [2022-01-18 07:01:42,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2022-01-18 07:01:42,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:42,400 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:01:42,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:01:42,401 INFO L85 PathProgramCache]: Analyzing trace with hash -1679960728, now seen corresponding path program 21 times [2022-01-18 07:01:42,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:01:42,401 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918054285] [2022-01-18 07:01:42,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:01:42,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:01:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:01:42,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:42,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:01:42,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918054285] [2022-01-18 07:01:42,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918054285] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:01:42,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989106281] [2022-01-18 07:01:42,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-01-18 07:01:42,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:01:42,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:01:42,761 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) [2022-01-18 07:01:42,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-01-18 07:01:42,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-01-18 07:01:42,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:01:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:01:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:01:43,255 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:43,255 INFO L387 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 109 treesize of output 99 [2022-01-18 07:01:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:01:49,532 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:01:51,040 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:01:51,040 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 323 treesize of output 273 [2022-01-18 07:02:11,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:11,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989106281] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:11,510 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:11,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 27 [2022-01-18 07:02:11,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133160703] [2022-01-18 07:02:11,510 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:11,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-18 07:02:11,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:11,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-18 07:02:11,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=579, Unknown=0, NotChecked=0, Total=702 [2022-01-18 07:02:11,510 INFO L87 Difference]: Start difference. First operand 3150 states and 11265 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:29,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:29,019 INFO L93 Difference]: Finished difference Result 6969 states and 23397 transitions. [2022-01-18 07:02:29,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-18 07:02:29,020 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:02:29,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:29,032 INFO L225 Difference]: With dead ends: 6969 [2022-01-18 07:02:29,032 INFO L226 Difference]: Without dead ends: 6931 [2022-01-18 07:02:29,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3109 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=1570, Invalid=7742, Unknown=0, NotChecked=0, Total=9312 [2022-01-18 07:02:29,033 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 374 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 2166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 684 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:29,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [374 Valid, 485 Invalid, 2166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1394 Invalid, 0 Unknown, 684 Unchecked, 1.2s Time] [2022-01-18 07:02:29,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6931 states. [2022-01-18 07:02:29,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6931 to 3124. [2022-01-18 07:02:29,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3124 states, 3123 states have (on average 3.5702849823887286) internal successors, (11150), 3123 states have internal predecessors, (11150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:29,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3124 states to 3124 states and 11150 transitions. [2022-01-18 07:02:29,097 INFO L78 Accepts]: Start accepts. Automaton has 3124 states and 11150 transitions. Word has length 26 [2022-01-18 07:02:29,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:29,097 INFO L470 AbstractCegarLoop]: Abstraction has 3124 states and 11150 transitions. [2022-01-18 07:02:29,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:29,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3124 states and 11150 transitions. [2022-01-18 07:02:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:29,102 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:29,102 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] [2022-01-18 07:02:29,117 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-01-18 07:02:29,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:29,302 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:29,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:29,303 INFO L85 PathProgramCache]: Analyzing trace with hash 358111584, now seen corresponding path program 22 times [2022-01-18 07:02:29,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:29,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134019441] [2022-01-18 07:02:29,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:29,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:29,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:29,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:29,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134019441] [2022-01-18 07:02:29,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134019441] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:29,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694457881] [2022-01-18 07:02:29,756 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-01-18 07:02:29,756 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:29,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:29,757 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) [2022-01-18 07:02:29,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-01-18 07:02:29,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-01-18 07:02:29,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:02:29,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 07:02:29,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:30,219 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:30,223 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:30,223 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 73 [2022-01-18 07:02:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:31,044 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:32,228 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:32,249 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:32,250 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 355 treesize of output 269 [2022-01-18 07:02:36,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:36,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694457881] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:36,168 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:36,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 25 [2022-01-18 07:02:36,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217694244] [2022-01-18 07:02:36,168 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:36,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-18 07:02:36,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:36,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-18 07:02:36,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2022-01-18 07:02:36,169 INFO L87 Difference]: Start difference. First operand 3124 states and 11150 transitions. Second operand has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:44,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:02:44,596 INFO L93 Difference]: Finished difference Result 6085 states and 19944 transitions. [2022-01-18 07:02:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-18 07:02:44,597 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-01-18 07:02:44,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:02:44,607 INFO L225 Difference]: With dead ends: 6085 [2022-01-18 07:02:44,607 INFO L226 Difference]: Without dead ends: 6005 [2022-01-18 07:02:44,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1940 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1058, Invalid=4642, Unknown=0, NotChecked=0, Total=5700 [2022-01-18 07:02:44,608 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 608 mSDsluCounter, 424 mSDsCounter, 0 mSdLazyCounter, 930 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 930 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-18 07:02:44,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 295 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 930 Invalid, 0 Unknown, 171 Unchecked, 0.8s Time] [2022-01-18 07:02:44,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6005 states. [2022-01-18 07:02:44,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6005 to 3159. [2022-01-18 07:02:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3159 states, 3158 states have (on average 3.571247625079164) internal successors, (11278), 3158 states have internal predecessors, (11278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:44,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3159 states to 3159 states and 11278 transitions. [2022-01-18 07:02:44,669 INFO L78 Accepts]: Start accepts. Automaton has 3159 states and 11278 transitions. Word has length 26 [2022-01-18 07:02:44,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:02:44,669 INFO L470 AbstractCegarLoop]: Abstraction has 3159 states and 11278 transitions. [2022-01-18 07:02:44,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.48) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:02:44,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3159 states and 11278 transitions. [2022-01-18 07:02:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:02:44,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:02:44,674 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:02:44,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-01-18 07:02:44,874 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,SelfDestructingSolverStorable64 [2022-01-18 07:02:44,874 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:02:44,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:02:44,875 INFO L85 PathProgramCache]: Analyzing trace with hash -790186942, now seen corresponding path program 41 times [2022-01-18 07:02:44,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:02:44,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206075314] [2022-01-18 07:02:44,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:02:44,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:02:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:02:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:45,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:02:45,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206075314] [2022-01-18 07:02:45,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206075314] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:02:45,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325088828] [2022-01-18 07:02:45,376 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-01-18 07:02:45,377 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:02:45,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:02:45,377 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) [2022-01-18 07:02:45,378 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-01-18 07:02:45,402 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-01-18 07:02:45,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:02:45,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2022-01-18 07:02:45,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:02:45,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:45,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:02:45,852 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:45,852 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 127 treesize of output 115 [2022-01-18 07:02:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:48,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:02:49,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:49,308 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:49,309 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:02:49,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:02:49,322 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 363 treesize of output 239 [2022-01-18 07:02:50,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:02:50,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325088828] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:02:50,227 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:02:50,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 30 [2022-01-18 07:02:50,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424507272] [2022-01-18 07:02:50,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:02:50,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-18 07:02:50,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:02:50,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-18 07:02:50,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2022-01-18 07:02:50,228 INFO L87 Difference]: Start difference. First operand 3159 states and 11278 transitions. Second operand has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 30 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) [2022-01-18 07:03:13,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:03:13,999 INFO L93 Difference]: Finished difference Result 7405 states and 24057 transitions. [2022-01-18 07:03:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-18 07:03:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 30 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 26 [2022-01-18 07:03:13,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:03:14,013 INFO L225 Difference]: With dead ends: 7405 [2022-01-18 07:03:14,013 INFO L226 Difference]: Without dead ends: 7348 [2022-01-18 07:03:14,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6984 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=3763, Invalid=14597, Unknown=0, NotChecked=0, Total=18360 [2022-01-18 07:03:14,014 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 782 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 2376 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 2572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 2376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-18 07:03:14,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [782 Valid, 580 Invalid, 2572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 2376 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-18 07:03:14,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7348 states. [2022-01-18 07:03:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7348 to 3195. [2022-01-18 07:03:14,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3195 states, 3194 states have (on average 3.586412022542267) internal successors, (11455), 3194 states have internal predecessors, (11455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:14,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3195 states to 3195 states and 11455 transitions. [2022-01-18 07:03:14,102 INFO L78 Accepts]: Start accepts. Automaton has 3195 states and 11455 transitions. Word has length 26 [2022-01-18 07:03:14,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:03:14,102 INFO L470 AbstractCegarLoop]: Abstraction has 3195 states and 11455 transitions. [2022-01-18 07:03:14,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.466666666666667) internal successors, (74), 30 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) [2022-01-18 07:03:14,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3195 states and 11455 transitions. [2022-01-18 07:03:14,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:03:14,108 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:03:14,108 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:03:14,124 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-01-18 07:03:14,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-01-18 07:03:14,317 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:03:14,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:03:14,318 INFO L85 PathProgramCache]: Analyzing trace with hash 692947996, now seen corresponding path program 42 times [2022-01-18 07:03:14,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:03:14,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495930667] [2022-01-18 07:03:14,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:03:14,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:03:14,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:03:14,783 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:14,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:03:14,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495930667] [2022-01-18 07:03:14,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495930667] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:03:14,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172684523] [2022-01-18 07:03:14,784 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-01-18 07:03:14,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:14,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:03:14,785 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) [2022-01-18 07:03:14,785 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-01-18 07:03:14,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-01-18 07:03:14,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:03:14,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:03:14,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:03:15,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:15,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:15,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:15,347 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:03:15,347 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 125 treesize of output 107 [2022-01-18 07:03:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:16,204 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:03:17,304 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:03:17,305 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:03:17,306 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:03:17,321 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:03:17,321 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 363 treesize of output 239 [2022-01-18 07:03:18,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:18,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172684523] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:03:18,256 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:03:18,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 27 [2022-01-18 07:03:18,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857668256] [2022-01-18 07:03:18,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:03:18,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-18 07:03:18,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:03:18,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-18 07:03:18,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2022-01-18 07:03:18,257 INFO L87 Difference]: Start difference. First operand 3195 states and 11455 transitions. Second operand has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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) [2022-01-18 07:03:34,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:03:34,683 INFO L93 Difference]: Finished difference Result 6028 states and 20131 transitions. [2022-01-18 07:03:34,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-18 07:03:34,683 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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 26 [2022-01-18 07:03:34,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:03:34,693 INFO L225 Difference]: With dead ends: 6028 [2022-01-18 07:03:34,693 INFO L226 Difference]: Without dead ends: 5930 [2022-01-18 07:03:34,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5085 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=2159, Invalid=12361, Unknown=0, NotChecked=0, Total=14520 [2022-01-18 07:03:34,694 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 510 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 2724 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 790 SdHoareTripleChecker+Invalid, 3133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 2724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 297 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-18 07:03:34,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [510 Valid, 790 Invalid, 3133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 2724 Invalid, 0 Unknown, 297 Unchecked, 2.0s Time] [2022-01-18 07:03:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5930 states. [2022-01-18 07:03:34,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5930 to 3414. [2022-01-18 07:03:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3414 states, 3413 states have (on average 3.59888661002051) internal successors, (12283), 3413 states have internal predecessors, (12283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:34,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3414 states to 3414 states and 12283 transitions. [2022-01-18 07:03:34,762 INFO L78 Accepts]: Start accepts. Automaton has 3414 states and 12283 transitions. Word has length 26 [2022-01-18 07:03:34,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:03:34,762 INFO L470 AbstractCegarLoop]: Abstraction has 3414 states and 12283 transitions. [2022-01-18 07:03:34,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5714285714285716) internal successors, (72), 27 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) [2022-01-18 07:03:34,763 INFO L276 IsEmpty]: Start isEmpty. Operand 3414 states and 12283 transitions. [2022-01-18 07:03:34,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:03:34,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:03:34,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:03:34,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2022-01-18 07:03:34,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:34,968 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:03:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:03:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash -363185156, now seen corresponding path program 43 times [2022-01-18 07:03:34,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:03:34,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397733685] [2022-01-18 07:03:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:03:34,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:03:34,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:03:35,436 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:35,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:03:35,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397733685] [2022-01-18 07:03:35,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397733685] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:03:35,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836345606] [2022-01-18 07:03:35,437 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-01-18 07:03:35,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:35,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:03:35,438 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) [2022-01-18 07:03:35,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-01-18 07:03:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:03:35,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2022-01-18 07:03:35,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:03:36,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:36,173 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:03:36,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:36,174 INFO L173 IndexEqualityManager]: detected equality via solver [2022-01-18 07:03:36,175 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 75 [2022-01-18 07:03:36,292 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:36,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:03:37,290 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:03:37,291 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 367 treesize of output 245 [2022-01-18 07:03:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:38,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836345606] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:03:38,629 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:03:38,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2022-01-18 07:03:38,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750655683] [2022-01-18 07:03:38,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:03:38,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:03:38,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:03:38,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:03:38,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:03:38,630 INFO L87 Difference]: Start difference. First operand 3414 states and 12283 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2022-01-18 07:03:49,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-18 07:03:49,241 INFO L93 Difference]: Finished difference Result 5250 states and 17601 transitions. [2022-01-18 07:03:49,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-18 07:03:49,241 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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 26 [2022-01-18 07:03:49,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-18 07:03:49,250 INFO L225 Difference]: With dead ends: 5250 [2022-01-18 07:03:49,250 INFO L226 Difference]: Without dead ends: 5144 [2022-01-18 07:03:49,251 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2898 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=1311, Invalid=7245, Unknown=0, NotChecked=0, Total=8556 [2022-01-18 07:03:49,251 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 405 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 431 SdHoareTripleChecker+Invalid, 1909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-18 07:03:49,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 431 Invalid, 1909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-18 07:03:49,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2022-01-18 07:03:49,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 3395. [2022-01-18 07:03:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3395 states, 3394 states have (on average 3.6019446081319977) internal successors, (12225), 3394 states have internal predecessors, (12225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-01-18 07:03:49,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3395 states to 3395 states and 12225 transitions. [2022-01-18 07:03:49,309 INFO L78 Accepts]: Start accepts. Automaton has 3395 states and 12225 transitions. Word has length 26 [2022-01-18 07:03:49,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-18 07:03:49,309 INFO L470 AbstractCegarLoop]: Abstraction has 3395 states and 12225 transitions. [2022-01-18 07:03:49,309 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 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) [2022-01-18 07:03:49,309 INFO L276 IsEmpty]: Start isEmpty. Operand 3395 states and 12225 transitions. [2022-01-18 07:03:49,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-18 07:03:49,314 INFO L506 BasicCegarLoop]: Found error trace [2022-01-18 07:03:49,314 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-18 07:03:49,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2022-01-18 07:03:49,527 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,SelfDestructingSolverStorable67 [2022-01-18 07:03:49,527 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2022-01-18 07:03:49,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-18 07:03:49,527 INFO L85 PathProgramCache]: Analyzing trace with hash 897223290, now seen corresponding path program 44 times [2022-01-18 07:03:49,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-01-18 07:03:49,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699833458] [2022-01-18 07:03:49,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-18 07:03:49,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-18 07:03:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-18 07:03:49,880 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:49,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-01-18 07:03:49,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699833458] [2022-01-18 07:03:49,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699833458] provided 0 perfect and 1 imperfect interpolant sequences [2022-01-18 07:03:49,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184281845] [2022-01-18 07:03:49,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-01-18 07:03:49,881 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-01-18 07:03:49,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-18 07:03:49,882 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) [2022-01-18 07:03:49,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-01-18 07:03:49,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-01-18 07:03:49,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-01-18 07:03:49,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2022-01-18 07:03:49,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-01-18 07:03:50,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:50,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-01-18 07:03:50,358 INFO L353 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-01-18 07:03:50,358 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 127 treesize of output 105 [2022-01-18 07:03:51,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:51,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-01-18 07:03:51,913 INFO L353 Elim1Store]: treesize reduction 24, result has 60.7 percent of original size [2022-01-18 07:03:51,913 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 371 treesize of output 253 [2022-01-18 07:03:53,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-18 07:03:53,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184281845] provided 0 perfect and 2 imperfect interpolant sequences [2022-01-18 07:03:53,500 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-01-18 07:03:53,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 25 [2022-01-18 07:03:53,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355546910] [2022-01-18 07:03:53,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-01-18 07:03:53,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-18 07:03:53,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-01-18 07:03:53,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-18 07:03:53,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2022-01-18 07:03:53,501 INFO L87 Difference]: Start difference. First operand 3395 states and 12225 transitions. Second operand has 26 states, 26 states have (on average 2.576923076923077) internal successors, (67), 25 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) Received shutdown request... [2022-01-18 07:04:48,081 WARN L244 SmtUtils]: Removed 3 from assertion stack [2022-01-18 07:04:48,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 282 states. [2022-01-18 07:04:48,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 298 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40738 ImplicationChecksByTransitivity, 52.4s TimeCoverageRelationStatistics Valid=11878, Invalid=77822, Unknown=0, NotChecked=0, Total=89700 [2022-01-18 07:04:48,084 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 745 mSDsluCounter, 1346 mSDsCounter, 0 mSdLazyCounter, 3097 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 745 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 3324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 3097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-18 07:04:48,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [745 Valid, 822 Invalid, 3324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 3097 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-18 07:04:48,085 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT (3 of 4 remaining) [2022-01-18 07:04:48,093 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:04:48,093 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2022-01-18 07:04:48,112 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2022-01-18 07:04:48,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-01-18 07:04:48,300 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (3395states) and FLOYD_HOARE automaton (currently 282 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 77 for 3ms.. [2022-01-18 07:04:48,302 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION (2 of 4 remaining) [2022-01-18 07:04:48,302 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION (1 of 4 remaining) [2022-01-18 07:04:48,302 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION (0 of 4 remaining) [2022-01-18 07:04:48,304 INFO L732 BasicCegarLoop]: Path program histogram: [44, 22, 1, 1, 1] [2022-01-18 07:04:48,305 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-01-18 07:04:48,305 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2022-01-18 07:04:48,306 INFO L202 PluginConnector]: Adding new model max-array-hom.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.01 07:04:48 BasicIcfg [2022-01-18 07:04:48,306 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-01-18 07:04:48,306 INFO L158 Benchmark]: Toolchain (without parser) took 767504.01ms. Allocated memory was 343.9MB in the beginning and 497.0MB in the end (delta: 153.1MB). Free memory was 305.1MB in the beginning and 325.9MB in the end (delta: -20.8MB). Peak memory consumption was 134.8MB. Max. memory is 16.0GB. [2022-01-18 07:04:48,307 INFO L158 Benchmark]: Boogie PL CUP Parser took 0.12ms. Allocated memory is still 343.9MB. Free memory is still 306.3MB. There was no memory consumed. Max. memory is 16.0GB. [2022-01-18 07:04:48,307 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.79ms. Allocated memory is still 343.9MB. Free memory was 305.1MB in the beginning and 303.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 07:04:48,307 INFO L158 Benchmark]: Boogie Preprocessor took 19.19ms. Allocated memory is still 343.9MB. Free memory was 303.5MB in the beginning and 302.6MB in the end (delta: 915.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2022-01-18 07:04:48,307 INFO L158 Benchmark]: RCFGBuilder took 229.68ms. Allocated memory is still 343.9MB. Free memory was 302.6MB in the beginning and 293.0MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. [2022-01-18 07:04:48,307 INFO L158 Benchmark]: TraceAbstraction took 767225.04ms. Allocated memory was 343.9MB in the beginning and 497.0MB in the end (delta: 153.1MB). Free memory was 292.5MB in the beginning and 325.9MB in the end (delta: -33.4MB). Peak memory consumption was 122.2MB. Max. memory is 16.0GB. [2022-01-18 07:04:48,307 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12ms. Allocated memory is still 343.9MB. Free memory is still 306.3MB. There was no memory consumed. Max. memory is 16.0GB. * Boogie Procedure Inliner took 25.79ms. Allocated memory is still 343.9MB. Free memory was 305.1MB in the beginning and 303.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 19.19ms. Allocated memory is still 343.9MB. Free memory was 303.5MB in the beginning and 302.6MB in the end (delta: 915.7kB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 229.68ms. Allocated memory is still 343.9MB. Free memory was 302.6MB in the beginning and 293.0MB in the end (delta: 9.6MB). Peak memory consumption was 8.4MB. Max. memory is 16.0GB. * TraceAbstraction took 767225.04ms. Allocated memory was 343.9MB in the beginning and 497.0MB in the end (delta: 153.1MB). Free memory was 292.5MB in the beginning and 325.9MB in the end (delta: -33.4MB). Peak memory consumption was 122.2MB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (3395states) and FLOYD_HOARE automaton (currently 282 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 77 for 3ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3395states) and FLOYD_HOARE automaton (currently 282 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 77 for 3ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3395states) and FLOYD_HOARE automaton (currently 282 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 77 for 3ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (3395states) and FLOYD_HOARE automaton (currently 282 states, 26 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 77 for 3ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 767.1s, OverallIterations: 69, TraceHistogramMax: 2, PathProgramHistogramMax: 44, EmptinessCheckTime: 0.2s, AutomataDifference: 485.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 24959 SdHoareTripleChecker+Valid, 52.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24959 mSDsluCounter, 21835 SdHoareTripleChecker+Invalid, 45.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 8533 IncrementalHoareTripleChecker+Unchecked, 37310 mSDsCounter, 5083 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 73180 IncrementalHoareTripleChecker+Invalid, 86796 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5083 mSolverCounterUnsat, 1877 mSDtfsCounter, 73180 mSolverCounterSat, 0.3s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 7298 GetRequests, 2481 SyntacticMatches, 151 SemanticMatches, 4665 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220030 ImplicationChecksByTransitivity, 457.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3414occurred in iteration=67, InterpolantAutomatonStates: 3737, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.8s AutomataMinimizationTime, 68 MinimizatonAttempts, 131330 StatesRemovedByMinimization, 68 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 262.7s InterpolantComputationTime, 3322 NumberOfCodeBlocks, 3316 NumberOfCodeBlocksAsserted, 211 NumberOfCheckSat, 4753 ConstructedInterpolants, 64 QuantifiedInterpolants, 140609 SizeOfPredicates, 732 NumberOfNonLiveVariables, 4259 ConjunctsInSsa, 1143 ConjunctsInUnsatCore, 201 InterpolantComputations, 3 PerfectInterpolantSequences, 174/1076 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown